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  1. <?xml version="1.0" ?>
  2. <feed xmlns="http://www.w3.org/2005/Atom" xmlns:g="http://base.google.com/ns/1.0">
  3.  <title>LEAP: Little Electronic and Arduino Projects</title>
  4.  <subtitle>my collection of electronics projects, many involving an Arduino in one way or another</subtitle>
  5.  <link href="https://leap.tardate.com/catalog/atom.xml" rel="self"/>
  6.  <link href="https://leap.tardate.com/"/>
  7.  <id>https://leap.tardate.com/</id>
  8.  <updated>2020-01-20T16:06:39Z</updated>
  9.  <author>
  10.    <name>Paul Gallagher</name>
  11.    <email>[email protected]</email>
  12.    <uri>https://github.com/tardate</uri>
  13.  </author>
  14.  <entry>
  15.    <id>https://leap.tardate.com/Equipment/MetalDetectorKit/</id>
  16.    <link href="https://leap.tardate.com/Equipment/MetalDetectorKit/"/>
  17.    <updated>2020-01-19T15:43:54Z</updated>
  18.    <title>#526 Metal Detector Kit</title>
  19.    <summary>An inductive metal detector kit powered by an 18650 with TP4333-based BMS charging circuit</summary>
  20.    <g:image_link>https://leap.tardate.com/Equipment/MetalDetectorKit/assets/MetalDetectorKit_build.jpg</g:image_link>
  21.    <category term="BMS"/>
  22.    <category term="RF"/>
  23.  </entry>
  24.  <entry>
  25.    <id>https://leap.tardate.com/Audio/SimpleSoundEffects2/</id>
  26.    <link href="https://leap.tardate.com/Audio/SimpleSoundEffects2/"/>
  27.    <updated>2020-01-15T16:25:24Z</updated>
  28.    <title>#525 Simple Sound Effects 2</title>
  29.    <summary>Building the ATtiny version of the Elektor Simple Sound Effects project, with a port to Arduino/C++.</summary>
  30.    <g:image_link>https://leap.tardate.com/Audio/SimpleSoundEffects2/assets/SimpleSoundEffects2_build.jpg</g:image_link>
  31.    <category term="Audio"/>
  32.    <category term="AVR"/>
  33.  </entry>
  34.  <entry>
  35.    <id>https://leap.tardate.com/playground/ThermalPrinter/Lucky4DOracle/</id>
  36.    <link href="https://leap.tardate.com/playground/ThermalPrinter/Lucky4DOracle/"/>
  37.    <updated>2019-12-30T04:27:25Z</updated>
  38.    <title>#524 Lucky 4D Printer</title>
  39.    <summary>A Lucky 4D number generator, built with a JP-QR701 Thermal Printer, including a detour into to print Chinese (GB2312-80)</summary>
  40.    <g:image_link>https://leap.tardate.com/playground/ThermalPrinter/Lucky4DOracle/assets/Lucky4DOracle_build.jpg</g:image_link>
  41.    <category term="Arduino"/>
  42.    <category term="Thermal Printer"/>
  43.  </entry>
  44.  <entry>
  45.    <id>https://leap.tardate.com/playground/ThermalPrinter/QR701Basics/</id>
  46.    <link href="https://leap.tardate.com/playground/ThermalPrinter/QR701Basics/"/>
  47.    <updated>2019-12-28T09:22:23Z</updated>
  48.    <title>#523 JP-QR701 Thermal Printer Basics</title>
  49.    <summary>Learning how to use the JP-QR701 thermal printer module with an Arduino, including QR codes generated with Python</summary>
  50.    <g:image_link>https://leap.tardate.com/playground/ThermalPrinter/QR701Basics/assets/QR701Basics_build.jpg</g:image_link>
  51.    <category term="Arduino"/>
  52.    <category term="Thermal Printer"/>
  53.  </entry>
  54.  <entry>
  55.    <id>https://leap.tardate.com/Radio/LPD433/RFDoorbell/</id>
  56.    <link href="https://leap.tardate.com/Radio/LPD433/RFDoorbell/"/>
  57.    <updated>2019-12-28T09:22:23Z</updated>
  58.    <title>#522 Remote Doorbell</title>
  59.    <summary>A simple doorbell using a 433MHz transmitter/receiver pair for remote signalling, and an HS-088 sound chip for a doorbell effect</summary>
  60.    <g:image_link>https://leap.tardate.com/Radio/LPD433/RFDoorbell/assets/RFDoorbell_build.jpg</g:image_link>
  61.    <category term="Radio"/>
  62.    <category term="OpAmp"/>
  63.    <category term="LPD433"/>
  64.    <category term="Music Chips"/>
  65.  </entry>
  66.  <entry>
  67.    <id>https://leap.tardate.com/Audio/AudioEffectsChips/CK9561/</id>
  68.    <link href="https://leap.tardate.com/Audio/AudioEffectsChips/CK9561/"/>
  69.    <updated>2019-12-22T04:55:25Z</updated>
  70.    <title>#521 CK9561 Audio Effects Chip</title>
  71.    <summary>Figuring out how to use the CK9561 music chip with 4 sound effects - alarm/siren/weapon sounds that sound strangely familiar if you have ever walked through a toy department at Christmas!</summary>
  72.    <g:image_link>https://leap.tardate.com/Audio/AudioEffectsChips/CK9561/assets/CK9561_build.jpg</g:image_link>
  73.    <category term="Audio"/>
  74.    <category term="Music Chips"/>
  75.  </entry>
  76.  <entry>
  77.    <id>https://leap.tardate.com/Electronics101/555Timer/ContinuityTester/</id>
  78.    <link href="https://leap.tardate.com/Electronics101/555Timer/ContinuityTester/"/>
  79.    <updated>2019-12-19T14:39:43Z</updated>
  80.    <title>#520 Continuity Tester</title>
  81.    <summary>A low-resistance continuity tester in a solder tube. Runs on 3V with a 555 timer buzzer.</summary>
  82.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/ContinuityTester/assets/ContinuityTester_build.jpg</g:image_link>
  83.    <category term="555 Timer"/>
  84.    <category term="Tools"/>
  85.    <category term="Test Equipment"/>
  86.  </entry>
  87.  <entry>
  88.    <id>https://leap.tardate.com/Electronics101/Fuses/PPTCPerformance/</id>
  89.    <link href="https://leap.tardate.com/Electronics101/Fuses/PPTCPerformance/"/>
  90.    <updated>2019-12-16T17:24:08Z</updated>
  91.    <title>#519 PPTC Performance</title>
  92.    <summary>Testing the performance of a few PolySwitch polymeric positive temperature coefficient (PPTC) resettable fuses</summary>
  93.    <g:image_link>https://leap.tardate.com/Electronics101/Fuses/PPTCPerformance/assets/PPTCPerformance_build.jpg</g:image_link>
  94.    <category term="Fuse"/>
  95.    <category term="Power"/>
  96.  </entry>
  97.  <entry>
  98.    <id>https://leap.tardate.com/Equipment/LipoTesterModule/</id>
  99.    <link href="https://leap.tardate.com/Equipment/LipoTesterModule/"/>
  100.    <updated>2019-12-16T17:24:08Z</updated>
  101.    <title>#518 Lipo Tester Module</title>
  102.    <summary>Just a quick look at a 1S to 8S battery tester and alarm module.</summary>
  103.    <g:image_link>https://leap.tardate.com/Equipment/LipoTesterModule/assets/LipoTesterModule_build.jpg</g:image_link>
  104.    <category term="Power"/>
  105.    <category term="BMS"/>
  106.    <category term="Tools"/>
  107.    <category term="Test Equipment"/>
  108.  </entry>
  109.  <entry>
  110.    <id>https://leap.tardate.com/Electronics101/555Timer/PrecisionVariableFrequencyFixedDuty/</id>
  111.    <link href="https://leap.tardate.com/Electronics101/555Timer/PrecisionVariableFrequencyFixedDuty/"/>
  112.    <updated>2019-12-16T17:24:08Z</updated>
  113.    <title>#517 555 Timer Fixed-duty VFO</title>
  114.    <summary>Using an unconventional configuration of a 555 timer variable frequency oscillator with fixed duty cycle (and precise duty cycle fine adjustment)</summary>
  115.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/PrecisionVariableFrequencyFixedDuty/assets/PrecisionVariableFrequencyFixedDuty_build.jpg</g:image_link>
  116.    <category term="555 Timer"/>
  117.    <category term="Oscillators"/>
  118.  </entry>
  119.  <entry>
  120.    <id>https://leap.tardate.com/Radio/FM/ZX2031Kit/</id>
  121.    <link href="https://leap.tardate.com/Radio/FM/ZX2031Kit/"/>
  122.    <updated>2019-12-12T15:37:15Z</updated>
  123.    <title>#516 ZX2031 FM Radio Kit</title>
  124.    <summary>Building an FM radio kit based on the Silan SC1088 FM receiver chip</summary>
  125.    <g:image_link>https://leap.tardate.com/Radio/FM/ZX2031Kit/assets/ZX2031Kit_build.jpg</g:image_link>
  126.    <category term="Radio"/>
  127.    <category term="FM"/>
  128.  </entry>
  129.  <entry>
  130.    <id>https://leap.tardate.com/Radio/FM/FrequencyConverter/</id>
  131.    <link href="https://leap.tardate.com/Radio/FM/FrequencyConverter/"/>
  132.    <updated>2019-12-08T03:41:36Z</updated>
  133.    <title>#515 FM Converter</title>
  134.    <summary>Playing with a simple FM frequency conversion circuit, and demonstrating how it can be used for external tuning</summary>
  135.    <g:image_link>https://leap.tardate.com/Radio/FM/FrequencyConverter/assets/FrequencyConverter_build.jpg</g:image_link>
  136.    <category term="Radio"/>
  137.    <category term="FM"/>
  138.  </entry>
  139.  <entry>
  140.    <id>https://leap.tardate.com/Electronics101/SubtractionLoopCounterKit/</id>
  141.    <link href="https://leap.tardate.com/Electronics101/SubtractionLoopCounterKit/"/>
  142.    <updated>2019-12-08T03:41:36Z</updated>
  143.    <title>#514 Subtraction Loop Counter Kit</title>
  144.    <summary>Investigating a single-digit counter with configurable range and frequency built with 74HC192, CD4011 and CD4511 logic</summary>
  145.    <g:image_link>https://leap.tardate.com/Electronics101/SubtractionLoopCounterKit/assets/SubtractionLoopCounterKit_build.jpg</g:image_link>
  146.    <category term="CMOS/TTL"/>
  147.  </entry>
  148.  <entry>
  149.    <id>https://leap.tardate.com/Equipment/DummyLoad/SimpleResistiveUsbLoad/</id>
  150.    <link href="https://leap.tardate.com/Equipment/DummyLoad/SimpleResistiveUsbLoad/"/>
  151.    <updated>2019-12-08T03:41:36Z</updated>
  152.    <title>#513 Simple USB Dummy Load</title>
  153.    <summary>Examining and testing a simple USB resistive dummy load</summary>
  154.    <g:image_link>https://leap.tardate.com/Equipment/DummyLoad/SimpleResistiveUsbLoad/assets/SimpleResistiveUsbLoad_build.jpg</g:image_link>
  155.    <category term="USB"/>
  156.    <category term="Dummy Load"/>
  157.  </entry>
  158.  <entry>
  159.    <id>https://leap.tardate.com/Audio/GreaterSimpleSoundEffects/</id>
  160.    <link href="https://leap.tardate.com/Audio/GreaterSimpleSoundEffects/"/>
  161.    <updated>2019-12-01T08:56:42Z</updated>
  162.    <title>#512 Greater Simple Sound Effects</title>
  163.    <summary>Reviving a design from Elektor in 1980, with light and touch-sensor variations on the basic CD4040/CD4049 oscillator. The circuit must have been used in BEAM robots back in the day, so my final build is a freeform phototrope squawker.</summary>
  164.    <g:image_link>https://leap.tardate.com/Audio/GreaterSimpleSoundEffects/assets/GreaterSimpleSoundEffects_build.jpg</g:image_link>
  165.    <category term="BEAM"/>
  166.    <category term="CMOS/TTL"/>
  167.    <category term="Sensors"/>
  168.  </entry>
  169.  <entry>
  170.    <id>https://leap.tardate.com/Electronics101/Power/BridgeDoublerSplitSupply/</id>
  171.    <link href="https://leap.tardate.com/Electronics101/Power/BridgeDoublerSplitSupply/"/>
  172.    <updated>2019-11-17T13:14:42Z</updated>
  173.    <title>#511 Bridge Doubler Split Supply</title>
  174.    <summary>an AC-powered bridge doubler supply with DC output governed by 7815/7915 ±15V DC linear regulation</summary>
  175.    <g:image_link>https://leap.tardate.com/Electronics101/Power/BridgeDoublerSplitSupply/assets/BridgeDoublerSplitSupply_build.jpg</g:image_link>
  176.    <category term="Power"/>
  177.  </entry>
  178.  <entry>
  179.    <id>https://leap.tardate.com/Electronics101/SerialInterface/UsbToRs232/</id>
  180.    <link href="https://leap.tardate.com/Electronics101/SerialInterface/UsbToRs232/"/>
  181.    <updated>2019-11-14T17:23:18Z</updated>
  182.    <title>#510 USB to RS-232 Adapter</title>
  183.    <summary>building a USB to 3-wire RS-232 adapter with the CH340G and MAX3232 chipsets</summary>
  184.    <g:image_link>https://leap.tardate.com/Electronics101/SerialInterface/UsbToRs232/assets/UsbToRs232_build.jpg</g:image_link>
  185.    <category term="RS232"/>
  186.    <category term="Serial"/>
  187.    <category term="USB"/>
  188.  </entry>
  189.  <entry>
  190.    <id>https://leap.tardate.com/Electronics101/SerialInterface/MAX3232/RS232TTLModule/</id>
  191.    <link href="https://leap.tardate.com/Electronics101/SerialInterface/MAX3232/RS232TTLModule/"/>
  192.    <updated>2019-11-13T14:58:15Z</updated>
  193.    <title>#509 MAX3232 RS232 to TTL Module</title>
  194.    <summary>Using a MAX3232 Module with CH340 adapter for USB to RS-232 serial communication, with examples using screen on MacOSX</summary>
  195.    <g:image_link>https://leap.tardate.com/Electronics101/SerialInterface/MAX3232/RS232TTLModule/assets/RS232TTLModule_build.jpg</g:image_link>
  196.    <category term="RS232"/>
  197.    <category term="Serial"/>
  198.    <category term="USB"/>
  199.  </entry>
  200.  <entry>
  201.    <id>https://leap.tardate.com/ESP32/UsingMDNS/</id>
  202.    <link href="https://leap.tardate.com/ESP32/UsingMDNS/"/>
  203.    <updated>2019-11-10T09:07:05Z</updated>
  204.    <title>#508 Using mDNS</title>
  205.    <summary>delving into multicast DNS and how it can be used to find and connect to ESP32 devices on the network</summary>
  206.    <g:image_link>https://leap.tardate.com/ESP32/UsingMDNS/assets/UsingMDNS_build.jpg</g:image_link>
  207.    <category term="ESP32"/>
  208.    <category term="mDNS"/>
  209.  </entry>
  210.  <entry>
  211.    <id>https://leap.tardate.com/Electronics101/Switches/SingleStageDelay/</id>
  212.    <link href="https://leap.tardate.com/Electronics101/Switches/SingleStageDelay/"/>
  213.    <updated>2019-11-05T13:14:23Z</updated>
  214.    <title>#507 Single-stage Delay Switch</title>
  215.    <summary>comparing BJT and MOSFETs for creating a simple turn-off delay with discrete components</summary>
  216.    <g:image_link>https://leap.tardate.com/Electronics101/Switches/SingleStageDelay/assets/SingleStageDelay_build.jpg</g:image_link>
  217.    <category term="Switches"/>
  218.    <category term="RC"/>
  219.  </entry>
  220.  <entry>
  221.    <id>https://leap.tardate.com/BoldportClub/pcbmode/</id>
  222.    <link href="https://leap.tardate.com/BoldportClub/pcbmode/"/>
  223.    <updated>2019-11-15T16:37:51Z</updated>
  224.    <title>#506 Learning PCBmodE</title>
  225.    <summary>learning how to use Boldport PCBmodE design software with an example of making a simple 555 timer LED blinky PCB</summary>
  226.    <g:image_link>https://leap.tardate.com/BoldportClub/pcbmode/assets/pcbmode_build.jpg</g:image_link>
  227.    <category term="Boldport"/>
  228.    <category term="PCB Design"/>
  229.    <category term="EDA"/>
  230.  </entry>
  231.  <entry>
  232.    <id>https://leap.tardate.com/Audio/RakitBaby8Sequencer/</id>
  233.    <link href="https://leap.tardate.com/Audio/RakitBaby8Sequencer/"/>
  234.    <updated>2019-10-29T01:56:14Z</updated>
  235.    <title>#505 Rakit Baby8 Sequencer</title>
  236.    <summary>Building the Rakit Baby8, an 8 step sequencer with CV and Gate outputs and a clock input.</summary>
  237.    <g:image_link>https://leap.tardate.com/Audio/RakitBaby8Sequencer/assets/RakitBaby8Sequencer_build.jpg</g:image_link>
  238.    <category term="Audio"/>
  239.    <category term="Music"/>
  240.    <category term="Sequencer"/>
  241.  </entry>
  242.  <entry>
  243.    <id>https://leap.tardate.com/Electronics101/INA226/HighSideMonitorBasics/</id>
  244.    <link href="https://leap.tardate.com/Electronics101/INA226/HighSideMonitorBasics/"/>
  245.    <updated>2019-10-26T18:30:41Z</updated>
  246.    <title>#504 INA226 High-side Monitor Basics</title>
  247.    <summary>How to design for the INA226 current and power monitor and test with an Arduino and various libraries including raw wire I²C</summary>
  248.    <g:image_link>https://leap.tardate.com/Electronics101/INA226/HighSideMonitorBasics/assets/HighSideMonitorBasics_build.jpg</g:image_link>
  249.    <category term="INA226"/>
  250.    <category term="Sensors"/>
  251.  </entry>
  252.  <entry>
  253.    <id>https://leap.tardate.com/Equipment/imaxRcB3LipoCharger/</id>
  254.    <link href="https://leap.tardate.com/Equipment/imaxRcB3LipoCharger/"/>
  255.    <updated>2019-10-20T15:46:35Z</updated>
  256.    <title>#503 imaxRC B3 Lipo Charger</title>
  257.    <summary>quick teardown and review of the imax B3 Pro charger for 2s and 3s Lithium-polymer battery packs</summary>
  258.    <g:image_link>https://leap.tardate.com/Equipment/imaxRcB3LipoCharger/assets/imaxRcB3LipoCharger_build.jpg</g:image_link>
  259.    <category term="Power"/>
  260.    <category term="BMS"/>
  261.  </entry>
  262.  <entry>
  263.    <id>https://leap.tardate.com/Equipment/Lii202SmartCharger/</id>
  264.    <link href="https://leap.tardate.com/Equipment/Lii202SmartCharger/"/>
  265.    <updated>2019-10-20T15:46:35Z</updated>
  266.    <title>#502 LiitoKala Lii-202 Smart Charger</title>
  267.    <summary>quick teardown and review of the Lii-202 18650 charger and power bank</summary>
  268.    <g:image_link>https://leap.tardate.com/Equipment/Lii202SmartCharger/assets/Lii202SmartCharger_build.jpg</g:image_link>
  269.    <category term="Power"/>
  270.    <category term="BMS"/>
  271.  </entry>
  272.  <entry>
  273.    <id>https://leap.tardate.com/Electronics101/BatteryManagement/SingleCellLithiumCharger/</id>
  274.    <link href="https://leap.tardate.com/Electronics101/BatteryManagement/SingleCellLithiumCharger/"/>
  275.    <updated>2019-10-20T15:46:35Z</updated>
  276.    <title>#501 Single-cell Lithium Charger</title>
  277.    <summary>How to charge a single 18650 lithium-ion cell with a TP4056-based charging kit, with comparison to ETA9635/ETA9638-based modules</summary>
  278.    <g:image_link>https://leap.tardate.com/Electronics101/BatteryManagement/SingleCellLithiumCharger/assets/SingleCellLithiumCharger_build.jpg</g:image_link>
  279.    <category term="Power"/>
  280.    <category term="BMS"/>
  281.  </entry>
  282.  <entry>
  283.    <id>https://leap.tardate.com/playground/RFID/Concentration/</id>
  284.    <link href="https://leap.tardate.com/playground/RFID/Concentration/"/>
  285.    <updated>2019-10-15T17:20:23Z</updated>
  286.    <title>#500 RFID Concentration Game</title>
  287.    <summary>Play a game of Concentration/Pairs with a stack of MIFARE Classic cards</summary>
  288.    <g:image_link>https://leap.tardate.com/playground/RFID/Concentration/assets/Concentration_build.jpg</g:image_link>
  289.    <category term="RFID"/>
  290.    <category term="Arduino"/>
  291.    <category term="Boldport"/>
  292.    <category term="LED"/>
  293.  </entry>
  294.  <entry>
  295.    <id>https://leap.tardate.com/Audio/AudioEffectsChips/HS088/Amplified/</id>
  296.    <link href="https://leap.tardate.com/Audio/AudioEffectsChips/HS088/Amplified/"/>
  297.    <updated>2019-09-29T13:47:06Z</updated>
  298.    <title>#499 HS088 Low-voltage Amplifier</title>
  299.    <summary>adding a low-voltage BJT class A amplifier for the HS088 Audio Effects Chip</summary>
  300.    <g:image_link>https://leap.tardate.com/Audio/AudioEffectsChips/HS088/Amplified/assets/Amplified_build.jpg</g:image_link>
  301.    <category term="Audio"/>
  302.    <category term="Music Chips"/>
  303.  </entry>
  304.  <entry>
  305.    <id>https://leap.tardate.com/Electronics101/TeslaCoil/MusicalKit/</id>
  306.    <link href="https://leap.tardate.com/Electronics101/TeslaCoil/MusicalKit/"/>
  307.    <updated>2019-09-29T13:47:06Z</updated>
  308.    <title>#498 Tesla Coil Plasma Speaker Kit</title>
  309.    <summary>playing with a Tesla coil (slayer exciter) circuit that also acts as an audio speaker with pulsing LED effects</summary>
  310.    <g:image_link>https://leap.tardate.com/Electronics101/TeslaCoil/MusicalKit/assets/MusicalKit_build.jpg</g:image_link>
  311.    <category term="Audio"/>
  312.    <category term="Power"/>
  313.    <category term="Oscillators"/>
  314.  </entry>
  315.  <entry>
  316.    <id>https://leap.tardate.com/ESP32/PublishingInternals/</id>
  317.    <link href="https://leap.tardate.com/ESP32/PublishingInternals/"/>
  318.    <updated>2019-09-29T13:47:06Z</updated>
  319.    <title>#497 Publishing Internals</title>
  320.    <summary>Publishing live ESP32 system internals to the web - an exploration of ESP32 features and web serving options, including JSON serialization</summary>
  321.    <g:image_link>https://leap.tardate.com/ESP32/PublishingInternals/assets/PublishingInternals_build.jpg</g:image_link>
  322.    <category term="ESP32"/>
  323.    <category term="JSON"/>
  324.    <category term="WebServer"/>
  325.    <category term="Sensors"/>
  326.  </entry>
  327.  <entry>
  328.    <id>https://leap.tardate.com/ESP32/GettingStarted/</id>
  329.    <link href="https://leap.tardate.com/ESP32/GettingStarted/"/>
  330.    <updated>2019-09-29T13:47:06Z</updated>
  331.    <title>#496 ESP32 Getting Started</title>
  332.    <summary>Getting started with the ESP32: connecting and programming from MacOSX with the Arduino IDE using a WiFi scanner script as an example</summary>
  333.    <g:image_link>https://leap.tardate.com/ESP32/GettingStarted/assets/GettingStarted_build.jpg</g:image_link>
  334.    <category term="ESP32"/>
  335.  </entry>
  336.  <entry>
  337.    <id>https://leap.tardate.com/Electronics101/BJT/NegativeFeedbackAmplifier/</id>
  338.    <link href="https://leap.tardate.com/Electronics101/BJT/NegativeFeedbackAmplifier/"/>
  339.    <updated>2019-09-14T15:33:45Z</updated>
  340.    <title>#495 Negative Feedback Amplifier</title>
  341.    <summary>examining the design and performance of an ac-coupled negative feedback amplifier constructed with BJTs</summary>
  342.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/NegativeFeedbackAmplifier/assets/NegativeFeedbackAmplifier_build.jpg</g:image_link>
  343.    <category term="BJT"/>
  344.  </entry>
  345.  <entry>
  346.    <id>https://leap.tardate.com/FPGA/Fomu/BuildNotifier/</id>
  347.    <link href="https://leap.tardate.com/FPGA/Fomu/BuildNotifier/"/>
  348.    <updated>2019-09-08T10:59:52Z</updated>
  349.    <title>#494 Fomu Build Notifier</title>
  350.    <summary>using the Fomu's RGB-in-your-USB as a test results notifier in RISC-V C (demonstrated with Ruby, RSpec and Guard)</summary>
  351.    <g:image_link>https://leap.tardate.com/FPGA/Fomu/BuildNotifier/assets/BuildNotifier_build.jpg</g:image_link>
  352.    <category term="FPGA"/>
  353.    <category term="Ruby"/>
  354.  </entry>
  355.  <entry>
  356.    <id>https://leap.tardate.com/FPGA/Fomu/GettingStarted/</id>
  357.    <link href="https://leap.tardate.com/FPGA/Fomu/GettingStarted/"/>
  358.    <updated>2019-09-08T10:59:52Z</updated>
  359.    <title>#493 Getting Started with Fomu</title>
  360.    <summary>first look at the Fomu FPGA and some tests running MicroPython on the RISC-V CPU core, and peeking/poking memory over the wishbone bus.</summary>
  361.    <g:image_link>https://leap.tardate.com/FPGA/Fomu/GettingStarted/assets/GettingStarted_build.jpg</g:image_link>
  362.    <category term="FPGA"/>
  363.  </entry>
  364.  <entry>
  365.    <id>https://leap.tardate.com/Kraft/KickingBack/</id>
  366.    <link href="https://leap.tardate.com/Kraft/KickingBack/"/>
  367.    <updated>2019-08-31T12:28:56Z</updated>
  368.    <title>#492 Kicking Back</title>
  369.    <summary>a useless machine/desktop toy that employs some overly complex mechanics to simply kick a ball (in a minor homage to @mPinoe)</summary>
  370.    <g:image_link>https://leap.tardate.com/Kraft/KickingBack/assets/KickingBack_build.jpg</g:image_link>
  371.    <category term="Sensors"/>
  372.    <category term="Solenoid"/>
  373.    <category term="555 Timer"/>
  374.  </entry>
  375.  <entry>
  376.    <id>https://leap.tardate.com/Kinetics/Solenoids/MagnetSwitchedSolenoid/</id>
  377.    <link href="https://leap.tardate.com/Kinetics/Solenoids/MagnetSwitchedSolenoid/"/>
  378.    <updated>2019-08-19T14:38:51Z</updated>
  379.    <title>#491 Magnet-switched Solenoid</title>
  380.    <summary>using a Hall effect sensor to trigger a solenoid with a fixed pulse</summary>
  381.    <g:image_link>https://leap.tardate.com/Kinetics/Solenoids/MagnetSwitchedSolenoid/assets/MagnetSwitchedSolenoid_build.jpg</g:image_link>
  382.    <category term="Solenoid"/>
  383.    <category term="Sensors"/>
  384.  </entry>
  385.  <entry>
  386.    <id>https://leap.tardate.com/Electronics101/EdgeDetection/555FallingEdgeDetector/</id>
  387.    <link href="https://leap.tardate.com/Electronics101/EdgeDetection/555FallingEdgeDetector/"/>
  388.    <updated>2019-08-19T14:38:51Z</updated>
  389.    <title>#490 555 Falling Edge Detector</title>
  390.    <summary>using the 555 timer, BJT inverter and AC-coupling to produce a fixed-width falling edge trigger pulse</summary>
  391.    <g:image_link>https://leap.tardate.com/Electronics101/EdgeDetection/555FallingEdgeDetector/assets/555FallingEdgeDetector_build.jpg</g:image_link>
  392.    <category term="555 Timer"/>
  393.  </entry>
  394.  <entry>
  395.    <id>https://leap.tardate.com/Electronics101/EdgeDetection/555RisingEdgeDetector/</id>
  396.    <link href="https://leap.tardate.com/Electronics101/EdgeDetection/555RisingEdgeDetector/"/>
  397.    <updated>2019-08-19T14:38:51Z</updated>
  398.    <title>#489 555 Rising Edge Detector</title>
  399.    <summary>using the 555 timer and AC-coupling to produce a fixed-width rising edge trigger pulse</summary>
  400.    <g:image_link>https://leap.tardate.com/Electronics101/EdgeDetection/555RisingEdgeDetector/assets/555RisingEdgeDetector_build.jpg</g:image_link>
  401.    <category term="555 Timer"/>
  402.  </entry>
  403.  <entry>
  404.    <id>https://leap.tardate.com/Electronics101/EdgeDetection/XorRcEdgeDetector/</id>
  405.    <link href="https://leap.tardate.com/Electronics101/EdgeDetection/XorRcEdgeDetector/"/>
  406.    <updated>2019-08-19T14:38:51Z</updated>
  407.    <title>#488 XOR-RC Edge Detector</title>
  408.    <summary>Dual edge detection with a 74LS86 XOR and RC circuit</summary>
  409.    <g:image_link>https://leap.tardate.com/Electronics101/EdgeDetection/XorRcEdgeDetector/assets/XorRcEdgeDetector_build.jpg</g:image_link>
  410.    <category term="CMOS/TTL"/>
  411.  </entry>
  412.  <entry>
  413.    <id>https://leap.tardate.com/Electronics101/Oscillators/CrystalLocked1khzOscillator/</id>
  414.    <link href="https://leap.tardate.com/Electronics101/Oscillators/CrystalLocked1khzOscillator/"/>
  415.    <updated>2019-08-12T05:18:25Z</updated>
  416.    <title>#487 Crystal-locked 1kHz Oscillator</title>
  417.    <summary>a 4.096MHz crystal oscillator divided by a CD4060, governing a wien-bridge oscillator to produce buffered sine and square wave outputs locked at 1kHz</summary>
  418.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/CrystalLocked1khzOscillator/assets/CrystalLocked1khzOscillator_build.jpg</g:image_link>
  419.    <category term="Oscillators"/>
  420.  </entry>
  421.  <entry>
  422.    <id>https://leap.tardate.com/playground/UsingTemplates/</id>
  423.    <link href="https://leap.tardate.com/playground/UsingTemplates/"/>
  424.    <updated>2019-07-21T18:12:55Z</updated>
  425.    <title>#486 Using C++ Templates</title>
  426.    <summary>Learning how to use C++ template functions in embedded projects with an Arduino</summary>
  427.    <g:image_link>https://leap.tardate.com/playground/UsingTemplates/assets/UsingTemplates_build.jpg</g:image_link>
  428.    <category term="Arduino"/>
  429.    <category term="C++"/>
  430.  </entry>
  431.  <entry>
  432.    <id>https://leap.tardate.com/playground/RFID/CardCounter/</id>
  433.    <link href="https://leap.tardate.com/playground/RFID/CardCounter/"/>
  434.    <updated>2019-07-21T18:12:55Z</updated>
  435.    <title>#485 RFID Card Counter</title>
  436.    <summary>Simple demonstratration of reading an writing value blocks with an RC522 RFID reader and MIFARE Classic cards</summary>
  437.    <g:image_link>https://leap.tardate.com/playground/RFID/CardCounter/assets/CardCounter_build.jpg</g:image_link>
  438.    <category term="RFID"/>
  439.    <category term="Arduino"/>
  440.  </entry>
  441.  <entry>
  442.    <id>https://leap.tardate.com/Electronics101/Oscillators/CrystalLocked455kHzModulated/</id>
  443.    <link href="https://leap.tardate.com/Electronics101/Oscillators/CrystalLocked455kHzModulated/"/>
  444.    <updated>2019-05-31T14:21:04Z</updated>
  445.    <title>#484 Crystal-Locked 455 kHz AM Oscillator</title>
  446.    <summary>crystal-locked 455 kHz carrier oscillator with fixed-frequency audio tone amplitude modulation (AM) for IF alignment</summary>
  447.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/CrystalLocked455kHzModulated/assets/CrystalLocked455kHzModulated_build.jpg</g:image_link>
  448.    <category term="Radio"/>
  449.    <category term="Oscillators"/>
  450.  </entry>
  451.  <entry>
  452.    <id>https://leap.tardate.com/Kraft/WyLed/</id>
  453.    <link href="https://leap.tardate.com/Kraft/WyLed/"/>
  454.    <updated>2019-05-26T11:40:18Z</updated>
  455.    <title>#483 WyLed</title>
  456.    <summary>.. when you allow an exploration of a chip (TM1638) to get a little out of hand! The WyLed free-form sculpture reacts to sound and blinks a 4-digit LED display. An ATTiny85 provides a little brain, and the TM1638 handles all input and output.</summary>
  457.    <g:image_link>https://leap.tardate.com/Kraft/WyLed/assets/WyLed_build.jpg</g:image_link>
  458.    <category term="Arduino"/>
  459.    <category term="ATmel"/>
  460.    <category term="LED"/>
  461.    <category term="TM1638"/>
  462.  </entry>
  463.  <entry>
  464.    <id>https://leap.tardate.com/Electronics101/Electret/SoundLevelTrigger/</id>
  465.    <link href="https://leap.tardate.com/Electronics101/Electret/SoundLevelTrigger/"/>
  466.    <updated>2019-05-26T11:40:18Z</updated>
  467.    <title>#482 Electret Sound-level Trigger</title>
  468.    <summary>a simple circuit using a TL072 op-amp and 74LS14 inverter for getting a clear digital trigger signal based on the sound level detected by an electret microphone</summary>
  469.    <g:image_link>https://leap.tardate.com/Electronics101/Electret/SoundLevelTrigger/assets/SoundLevelTrigger_build.jpg</g:image_link>
  470.    <category term="Electret"/>
  471.    <category term="Audio"/>
  472.    <category term="Sensor"/>
  473.  </entry>
  474.  <entry>
  475.    <id>https://leap.tardate.com/playground/LED7Segment/TM1638/</id>
  476.    <link href="https://leap.tardate.com/playground/LED7Segment/TM1638/"/>
  477.    <updated>2019-05-26T11:40:18Z</updated>
  478.    <title>#481 TM1638 7-Segment LED Driver</title>
  479.    <summary>investigating the capabilities of the TM1638 as a 7-segment display driver and key pad controller</summary>
  480.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/TM1638/assets/TM1638_build.jpg</g:image_link>
  481.    <category term="7-Segment"/>
  482.    <category term="Arduino"/>
  483.    <category term="LED"/>
  484.    <category term="TM1638"/>
  485.  </entry>
  486.  <entry>
  487.    <id>https://leap.tardate.com/playground/LED7Segment/</id>
  488.    <link href="https://leap.tardate.com/playground/LED7Segment/"/>
  489.    <updated>2016-06-23T14:50:15Z</updated>
  490.    <title>#480 7-Segment LED Displays</title>
  491.    <summary>All about LED 7-segment displays</summary>
  492.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/assets/LED7Segment_build.jpg</g:image_link>
  493.    <category term="7-Segment"/>
  494.    <category term="LED"/>
  495.  </entry>
  496.  <entry>
  497.    <id>https://leap.tardate.com/playground/LED7Segment/MAX7219/LedControlDemo/</id>
  498.    <link href="https://leap.tardate.com/playground/LED7Segment/MAX7219/LedControlDemo/"/>
  499.    <updated>2019-05-26T11:40:18Z</updated>
  500.    <title>#479 LedControl MAX7219 7-Segment LED Driver</title>
  501.    <summary>Driving a series of 7-segment LED displays with the MAX7219 and the LedControl library</summary>
  502.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/MAX7219/LedControlDemo/assets/LedControlDemo_build.jpg</g:image_link>
  503.    <category term="7-Segment"/>
  504.    <category term="Arduino"/>
  505.    <category term="LED"/>
  506.    <category term="MAX7219"/>
  507.  </entry>
  508.  <entry>
  509.    <id>https://leap.tardate.com/playground/LED7Segment/MAX7219/RawDrive/</id>
  510.    <link href="https://leap.tardate.com/playground/LED7Segment/MAX7219/RawDrive/"/>
  511.    <updated>2019-05-05T11:19:13Z</updated>
  512.    <title>#478 Raw MAX7219 7-Segment LED Driver</title>
  513.    <summary>Driving a series of 7-segment LED displays with the MAX7219 and raw SPI commands</summary>
  514.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/MAX7219/RawDrive/assets/RawDrive_build.jpg</g:image_link>
  515.    <category term="7-Segment"/>
  516.    <category term="Arduino"/>
  517.    <category term="LED"/>
  518.    <category term="MAX7219"/>
  519.  </entry>
  520.  <entry>
  521.    <id>https://leap.tardate.com/Audio/RakitDrumSynth/</id>
  522.    <link href="https://leap.tardate.com/Audio/RakitDrumSynth/"/>
  523.    <updated>2019-05-05T11:19:13Z</updated>
  524.    <title>#477 Rakit Drum Synth</title>
  525.    <summary>building the Rakit Drum Synth kit - a very nicely produced clone of the classic Boss PC-2/AMDEK PCK-100 percussion synthesizer</summary>
  526.    <g:image_link>https://leap.tardate.com/Audio/RakitDrumSynth/assets/RakitDrumSynth_build.jpg</g:image_link>
  527.    <category term="Audio"/>
  528.    <category term="Drum"/>
  529.    <category term="Synth"/>
  530.    <category term="Music"/>
  531.  </entry>
  532.  <entry>
  533.    <id>https://leap.tardate.com/Radio/FM/SimplestDirectReceiver/</id>
  534.    <link href="https://leap.tardate.com/Radio/FM/SimplestDirectReceiver/"/>
  535.    <updated>2019-04-28T10:42:00Z</updated>
  536.    <title>#476 Simplest Direct FM Receiver</title>
  537.    <summary>Taming a very simple direct conversion FM receiver</summary>
  538.    <g:image_link>https://leap.tardate.com/Radio/FM/SimplestDirectReceiver/assets/SimplestDirectReceiver_build.jpg</g:image_link>
  539.    <category term="Radio"/>
  540.    <category term="FM"/>
  541.  </entry>
  542.  <entry>
  543.    <id>https://leap.tardate.com/Equipment/ANG860B/</id>
  544.    <link href="https://leap.tardate.com/Equipment/ANG860B/"/>
  545.    <updated>2019-04-27T11:59:59Z</updated>
  546.    <title>#475 ANG860B</title>
  547.    <summary>specifications and notes on the ANENG ANG860B+ digital multimeter</summary>
  548.    <g:image_link>https://leap.tardate.com/Equipment/ANG860B/assets/ANG860B_build.jpg</g:image_link>
  549.    <category term="Tools"/>
  550.    <category term="Test Equipment"/>
  551.    <category term="DMM"/>
  552.  </entry>
  553.  <entry>
  554.    <id>https://leap.tardate.com/Electronics101/AudioEffects/WhiteNoiseGenerator/</id>
  555.    <link href="https://leap.tardate.com/Electronics101/AudioEffects/WhiteNoiseGenerator/"/>
  556.    <updated>2019-04-25T15:07:18Z</updated>
  557.    <title>#474 BJT White Noise Generator</title>
  558.    <summary>Building a common white noise generator circuit and optimising it for 9V operation with BC337 transistors</summary>
  559.    <g:image_link>https://leap.tardate.com/Electronics101/AudioEffects/WhiteNoiseGenerator/assets/WhiteNoiseGenerator_build.jpg</g:image_link>
  560.    <category term="Audio"/>
  561.    <category term="BJT"/>
  562.  </entry>
  563.  <entry>
  564.    <id>https://leap.tardate.com/Kraft/xdiskclk/</id>
  565.    <link href="https://leap.tardate.com/Kraft/xdiskclk/"/>
  566.    <updated>2019-04-25T15:07:18Z</updated>
  567.    <title>#473 xdiskclk</title>
  568.    <summary>An old 3.5 inch disk drive was begging to be disassembled and transformed with the addition of a simple clock mechanism to produce the ex-disk-clock</summary>
  569.    <g:image_link>https://leap.tardate.com/Kraft/xdiskclk/assets/xdiskclk_build.jpg</g:image_link>
  570.    <category term="Craft"/>
  571.    <category term="Clock"/>
  572.  </entry>
  573.  <entry>
  574.    <id>https://leap.tardate.com/Electronics101/Power/CapacitiveDropper/</id>
  575.    <link href="https://leap.tardate.com/Electronics101/Power/CapacitiveDropper/"/>
  576.    <updated>2019-04-21T08:16:06Z</updated>
  577.    <title>#472 CapacitiveDropper</title>
  578.    <summary>Understanding how to design a capacitive dropper, and demonstration with a low-voltage LED driver circuit</summary>
  579.    <g:image_link>https://leap.tardate.com/Electronics101/Power/CapacitiveDropper/assets/CapacitiveDropper_build.jpg</g:image_link>
  580.    <category term="Power"/>
  581.  </entry>
  582.  <entry>
  583.    <id>https://leap.tardate.com/Electronics101/LED/FluorescentRingReplacement/</id>
  584.    <link href="https://leap.tardate.com/Electronics101/LED/FluorescentRingReplacement/"/>
  585.    <updated>2019-04-21T08:16:06Z</updated>
  586.    <title>#471 Fluorescent Ring LED Replacement</title>
  587.    <summary>Understanding fluorescent lighting and installing an LED replacement</summary>
  588.    <g:image_link>https://leap.tardate.com/Electronics101/LED/FluorescentRingReplacement/assets/FluorescentRingReplacement_build.jpg</g:image_link>
  589.    <category term="LED"/>
  590.    <category term="Power"/>
  591.    <category term="Lighting"/>
  592.  </entry>
  593.  <entry>
  594.    <id>https://leap.tardate.com/Radio/AM/SimpleCrystalTransmitter/</id>
  595.    <link href="https://leap.tardate.com/Radio/AM/SimpleCrystalTransmitter/"/>
  596.    <updated>2019-04-20T06:52:07Z</updated>
  597.    <title>#470 Simple Crystal AM Transmitter</title>
  598.    <summary>building a classic crystal-locked AM transmitter with a 1MHz MCO-1510A CMOS crystal oscillator</summary>
  599.    <g:image_link>https://leap.tardate.com/Radio/AM/SimpleCrystalTransmitter/assets/SimpleCrystalTransmitter_build.jpg</g:image_link>
  600.    <category term="Radio"/>
  601.    <category term="AM"/>
  602.    <category term="Transmitter"/>
  603.  </entry>
  604.  <entry>
  605.    <id>https://leap.tardate.com/Electronics101/BreadboardBling/LM386AudioAmp/</id>
  606.    <link href="https://leap.tardate.com/Electronics101/BreadboardBling/LM386AudioAmp/"/>
  607.    <updated>2019-04-15T12:26:29Z</updated>
  608.    <title>#469 LM386 Audio Amp</title>
  609.    <summary>A basic LM386 audio amplifier with volume and gain control on a breadboard-compatbile mounting</summary>
  610.    <g:image_link>https://leap.tardate.com/Electronics101/BreadboardBling/LM386AudioAmp/assets/LM386AudioAmp_build.jpg</g:image_link>
  611.    <category term="Breadboard Bling"/>
  612.    <category term="Audio"/>
  613.    <category term="OpAmp"/>
  614.  </entry>
  615.  <entry>
  616.    <id>https://leap.tardate.com/Electronics101/BreadboardBling/DuplexTuningCapacitor/</id>
  617.    <link href="https://leap.tardate.com/Electronics101/BreadboardBling/DuplexTuningCapacitor/"/>
  618.    <updated>2019-04-09T14:50:13Z</updated>
  619.    <title>#468 Duplex Tuning Capacitor</title>
  620.    <summary>making a breadboard-compatible variable capacitor for radio circuits</summary>
  621.    <g:image_link>https://leap.tardate.com/Electronics101/BreadboardBling/DuplexTuningCapacitor/assets/DuplexTuningCapacitor_build.jpg</g:image_link>
  622.    <category term="Breadboard Bling"/>
  623.    <category term="Radio"/>
  624.  </entry>
  625.  <entry>
  626.    <id>https://leap.tardate.com/Radio/FM/TwoStageTransmitter/</id>
  627.    <link href="https://leap.tardate.com/Radio/FM/TwoStageTransmitter/"/>
  628.    <updated>2019-04-08T02:06:47Z</updated>
  629.    <title>#467 Two-stage FM Transmitter</title>
  630.    <summary>build and test a simple two-stage FM transmitter</summary>
  631.    <g:image_link>https://leap.tardate.com/Radio/FM/TwoStageTransmitter/assets/TwoStageTransmitter_build.jpg</g:image_link>
  632.    <category term="Radio"/>
  633.    <category term="FM"/>
  634.  </entry>
  635.  <entry>
  636.    <id>https://leap.tardate.com/Equipment/VC3165/</id>
  637.    <link href="https://leap.tardate.com/Equipment/VC3165/"/>
  638.    <updated>2019-04-07T03:57:01Z</updated>
  639.    <title>#466 VC3165</title>
  640.    <summary>all about the Victor VC3165 frequency counter</summary>
  641.    <g:image_link>https://leap.tardate.com/Equipment/VC3165/assets/VC3165_build.jpg</g:image_link>
  642.    <category term="Tools"/>
  643.    <category term="Test Equipment"/>
  644.  </entry>
  645.  <entry>
  646.    <id>https://leap.tardate.com/Electronics101/BJT/MrBiJuT/</id>
  647.    <link href="https://leap.tardate.com/Electronics101/BJT/MrBiJuT/"/>
  648.    <updated>2019-04-05T15:21:20Z</updated>
  649.    <title>#465 MrBiJuT</title>
  650.    <summary>Mr BiJuT is a freeform realisation of a simple NPN/PNP transistor testing circuit using a CD4011 Schmitt oscillator</summary>
  651.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/MrBiJuT/assets/MrBiJuT_build.jpg</g:image_link>
  652.    <category term="BJT"/>
  653.    <category term="Test Equipment"/>
  654.    <category term="Oscillators"/>
  655.  </entry>
  656.  <entry>
  657.    <id>https://leap.tardate.com/Radio/AM/SingleTransistorTransmitter/</id>
  658.    <link href="https://leap.tardate.com/Radio/AM/SingleTransistorTransmitter/"/>
  659.    <updated>2019-03-26T11:22:03Z</updated>
  660.    <title>#464 Single Transistor AM Transmitter</title>
  661.    <summary>building a low power, single transistor AM transmitter with surprisingly good fidelity</summary>
  662.    <g:image_link>https://leap.tardate.com/Radio/AM/SingleTransistorTransmitter/assets/SingleTransistorTransmitter_build.jpg</g:image_link>
  663.    <category term="Radio"/>
  664.    <category term="AM"/>
  665.    <category term="Transmitter"/>
  666.  </entry>
  667.  <entry>
  668.    <id>https://leap.tardate.com/Electronics101/OpAmp/Transconductance/</id>
  669.    <link href="https://leap.tardate.com/Electronics101/OpAmp/Transconductance/"/>
  670.    <updated>2019-03-22T15:06:42Z</updated>
  671.    <title>#463 Transconductance Amplifiers</title>
  672.    <summary>understanding transconductance amplifiers and how they can be realised with an op-amp, and testing both single and dual-supply transconductance circuits based on an LM741 op-amp</summary>
  673.    <g:image_link>https://leap.tardate.com/Electronics101/OpAmp/Transconductance/assets/Transconductance_build.jpg</g:image_link>
  674.    <category term="OpAmp"/>
  675.  </entry>
  676.  <entry>
  677.    <id>https://leap.tardate.com/Radio/AM/HX108-2/</id>
  678.    <link href="https://leap.tardate.com/Radio/AM/HX108-2/"/>
  679.    <updated>2019-03-18T15:30:49Z</updated>
  680.    <title>#462 HX108-2</title>
  681.    <summary>build and analyse the HX108-2 superheterodyne AM MW radio receiver kit</summary>
  682.    <g:image_link>https://leap.tardate.com/Radio/AM/HX108-2/assets/HX108-2_build.jpg</g:image_link>
  683.    <category term="Radio"/>
  684.    <category term="AM"/>
  685.  </entry>
  686.  <entry>
  687.    <id>https://leap.tardate.com/Electronics101/GuitarEffects/Goblin/</id>
  688.    <link href="https://leap.tardate.com/Electronics101/GuitarEffects/Goblin/"/>
  689.    <updated>2019-03-11T15:50:20Z</updated>
  690.    <title>#461 Goblin</title>
  691.    <summary>the Goblin is what I'm calling my remake of the classic Ibanez Tube Screamer 808, after researching how the circuit works and common modifications</summary>
  692.    <g:image_link>https://leap.tardate.com/Electronics101/GuitarEffects/Goblin/assets/Goblin_build.jpg</g:image_link>
  693.    <category term="Guitar Effects"/>
  694.    <category term="Audio"/>
  695.  </entry>
  696.  <entry>
  697.    <id>https://leap.tardate.com/Electronics101/AudioEffects/CANary/</id>
  698.    <link href="https://leap.tardate.com/Electronics101/AudioEffects/CANary/"/>
  699.    <updated>2019-03-07T11:13:46Z</updated>
  700.    <title>#460 CANary</title>
  701.    <summary>playing with a popular 74HC14 bird chirp effect by Wilf Rigter and making a CANary sculpture</summary>
  702.    <g:image_link>https://leap.tardate.com/Electronics101/AudioEffects/CANary/assets/CANary_build.jpg</g:image_link>
  703.    <category term="BEAM"/>
  704.    <category term="Oscillators"/>
  705.    <category term="Audio"/>
  706.  </entry>
  707.  <entry>
  708.    <id>https://leap.tardate.com/Electronics101/OpAmp/TwinTeeOscillator/</id>
  709.    <link href="https://leap.tardate.com/Electronics101/OpAmp/TwinTeeOscillator/"/>
  710.    <updated>2019-03-05T14:24:38Z</updated>
  711.    <title>#459 TwinTeeOscillator</title>
  712.    <summary>a twin-tee sine wave oscillator using an TL072 Op-Amp, running in the audio spectrum</summary>
  713.    <g:image_link>https://leap.tardate.com/Electronics101/OpAmp/TwinTeeOscillator/assets/TwinTeeOscillator_build.jpg</g:image_link>
  714.    <category term="OpAmp"/>
  715.    <category term="Oscillators"/>
  716.  </entry>
  717.  <entry>
  718.    <id>https://leap.tardate.com/playground/FastAnalogRead/</id>
  719.    <link href="https://leap.tardate.com/playground/FastAnalogRead/"/>
  720.    <updated>2019-03-05T04:11:15Z</updated>
  721.    <title>#458 FastAnalogRead</title>
  722.    <summary>how to increase the Arduino ADC analog sampling rate</summary>
  723.    <g:image_link>https://leap.tardate.com/playground/FastAnalogRead/assets/FastAnalogRead_build.jpg</g:image_link>
  724.    <category term="Arduino"/>
  725.    <category term="GPIO"/>
  726.  </entry>
  727.  <entry>
  728.    <id>https://leap.tardate.com/playground/PrecisionTimer/</id>
  729.    <link href="https://leap.tardate.com/playground/PrecisionTimer/"/>
  730.    <updated>2019-03-05T03:49:15Z</updated>
  731.    <title>#457 PrecisionTimer</title>
  732.    <summary>comparing the precision and constraints of various methods for timing an operation with an Atmega328, with some discussion of the timer/counter features of the chip</summary>
  733.    <g:image_link>https://leap.tardate.com/playground/PrecisionTimer/assets/PrecisionTimer_build.jpg</g:image_link>
  734.    <category term="Arduino"/>
  735.  </entry>
  736.  <entry>
  737.    <id>https://leap.tardate.com/BoldportClub/pease-out/</id>
  738.    <link href="https://leap.tardate.com/BoldportClub/pease-out/"/>
  739.    <updated>2019-02-21T14:50:29Z</updated>
  740.    <title>#456 BoldportClub/pease-out</title>
  741.    <summary>an audio voltage indicator based on the Boldport Club Pease-out, Project #32 Jan 2019</summary>
  742.    <g:image_link>https://leap.tardate.com/BoldportClub/pease-out/assets/pease-out_build.jpg</g:image_link>
  743.    <category term="Boldport"/>
  744.    <category term="PCB Design"/>
  745.    <category term="LM331"/>
  746.  </entry>
  747.  <entry>
  748.    <id>https://leap.tardate.com/Electronics101/PiezoBuzzers/</id>
  749.    <link href="https://leap.tardate.com/Electronics101/PiezoBuzzers/"/>
  750.    <updated>2019-02-21T14:50:29Z</updated>
  751.    <title>#455 PiezoBuzzers</title>
  752.    <summary>exploring techniques for driving piezo transducers and buzzer units for audio output</summary>
  753.    <g:image_link>https://leap.tardate.com/Electronics101/PiezoBuzzers/assets/PiezoBuzzers_build.jpg</g:image_link>
  754.    <category term="Oscillators"/>
  755.    <category term="Crystal"/>
  756.    <category term="Audio"/>
  757.  </entry>
  758.  <entry>
  759.    <id>https://leap.tardate.com/Electronics101/VoltageReference/ADR4540/</id>
  760.    <link href="https://leap.tardate.com/Electronics101/VoltageReference/ADR4540/"/>
  761.    <updated>2019-02-21T14:50:29Z</updated>
  762.    <title>#454 VoltageReference/ADR4540</title>
  763.    <summary>exploring the ADR4540 precision reference, tested with an Arduino as an external voltage reference</summary>
  764.    <g:image_link>https://leap.tardate.com/Electronics101/VoltageReference/ADR4540/assets/ADR4540_build.jpg</g:image_link>
  765.    <category term="Voltage Reference"/>
  766.  </entry>
  767.  <entry>
  768.    <id>https://leap.tardate.com/Electronics101/BreadboardBling/PotModules/</id>
  769.    <link href="https://leap.tardate.com/Electronics101/BreadboardBling/PotModules/"/>
  770.    <updated>2019-02-21T14:50:29Z</updated>
  771.    <title>#453 PotModules</title>
  772.    <summary>Making some breadboard-compatible potentiometers and covering some basics of terminology, Ohm's Law and voltage dividers</summary>
  773.    <g:image_link>https://leap.tardate.com/Electronics101/BreadboardBling/PotModules/assets/PotModules_build.jpg</g:image_link>
  774.    <category term="Breadboard Bling"/>
  775.  </entry>
  776.  <entry>
  777.    <id>https://leap.tardate.com/Electronics101/CD4046/MainsLinkedPLL/</id>
  778.    <link href="https://leap.tardate.com/Electronics101/CD4046/MainsLinkedPLL/"/>
  779.    <updated>2019-02-21T14:50:29Z</updated>
  780.    <title>#452 CD4046/MainsLinkedPLL</title>
  781.    <summary>A 50/60Hz oscillator locked to mains power frequency using the CD4046 PLL</summary>
  782.    <g:image_link>https://leap.tardate.com/Electronics101/CD4046/MainsLinkedPLL/assets/MainsLinkedPLL_build.jpg</g:image_link>
  783.    <category term="Oscillators"/>
  784.    <category term="PLL"/>
  785.  </entry>
  786.  <entry>
  787.    <id>https://leap.tardate.com/Electronics101/ArcGeneratorKit/</id>
  788.    <link href="https://leap.tardate.com/Electronics101/ArcGeneratorKit/"/>
  789.    <updated>2019-02-21T14:50:29Z</updated>
  790.    <title>#451 ArcGeneratorKit</title>
  791.    <summary>playing with a high-voltage arc generator kit that uses step-up transformer with a simple feedback control of a D882 power transistor</summary>
  792.    <g:image_link>https://leap.tardate.com/Electronics101/ArcGeneratorKit/assets/ArcGeneratorKit_build.jpg</g:image_link>
  793.    <category term="Power"/>
  794.  </entry>
  795.  <entry>
  796.    <id>https://leap.tardate.com/Equipment/LCR45/</id>
  797.    <link href="https://leap.tardate.com/Equipment/LCR45/"/>
  798.    <updated>2019-02-21T14:50:29Z</updated>
  799.    <title>#450 LCR45</title>
  800.    <summary>evaluating the Peak LCR45 inductance, capacitance and resistance meter</summary>
  801.    <g:image_link>https://leap.tardate.com/Equipment/LCR45/assets/LCR45_build.jpg</g:image_link>
  802.    <category term="Tools"/>
  803.    <category term="Test Equipment"/>
  804.  </entry>
  805.  <entry>
  806.    <id>https://leap.tardate.com/Electronics101/AudioEffects/Parrot/</id>
  807.    <link href="https://leap.tardate.com/Electronics101/AudioEffects/Parrot/"/>
  808.    <updated>2019-01-28T18:20:45Z</updated>
  809.    <title>#449 AudioEffects/Parrot</title>
  810.    <summary>playing with a 1-transistor, dual oscillator chirping sound effect circuit</summary>
  811.    <g:image_link>https://leap.tardate.com/Electronics101/AudioEffects/Parrot/assets/Parrot_build.jpg</g:image_link>
  812.    <category term="Audio"/>
  813.    <category term="BEAM"/>
  814.    <category term="Oscillators"/>
  815.  </entry>
  816.  <entry>
  817.    <id>https://leap.tardate.com/Electronics101/ADC/LTC2400/</id>
  818.    <link href="https://leap.tardate.com/Electronics101/ADC/LTC2400/"/>
  819.    <updated>2019-01-28T18:20:45Z</updated>
  820.    <title>#448 LTC2400</title>
  821.    <summary>exploring the tips and traps involved in getting accurate readings from the LTC2400 24-bit ADC</summary>
  822.    <g:image_link>https://leap.tardate.com/Electronics101/ADC/LTC2400/assets/LTC2400_build.jpg</g:image_link>
  823.    <category term="ADC"/>
  824.  </entry>
  825.  <entry>
  826.    <id>https://leap.tardate.com/BoldportClub/capacimeter/</id>
  827.    <link href="https://leap.tardate.com/BoldportClub/capacimeter/"/>
  828.    <updated>2019-01-14T02:14:30Z</updated>
  829.    <title>#447 BoldportClub/capacimeter</title>
  830.    <summary>measuring capacitance with old-school 555 and 4017 digital logic - a Boldport Club remix of a PEAK, Project #31, December 2018</summary>
  831.    <g:image_link>https://leap.tardate.com/BoldportClub/capacimeter/assets/capacimeter_build.jpg</g:image_link>
  832.    <category term="Boldport"/>
  833.    <category term="Tools"/>
  834.    <category term="Test Equipment"/>
  835.  </entry>
  836.  <entry>
  837.    <id>https://leap.tardate.com/Electronics101/ToroidJouleThief/RgbNightLight/</id>
  838.    <link href="https://leap.tardate.com/Electronics101/ToroidJouleThief/RgbNightLight/"/>
  839.    <updated>2019-01-06T11:54:51Z</updated>
  840.    <title>#446 RGB Joule Thief Night Light</title>
  841.    <summary>testing a slow-flash RGB LED with a 1.5V joule thief power supply</summary>
  842.    <g:image_link>https://leap.tardate.com/Electronics101/ToroidJouleThief/RgbNightLight/assets/RgbNightLight_build.jpg</g:image_link>
  843.    <category term="LED"/>
  844.    <category term="Power"/>
  845.  </entry>
  846.  <entry>
  847.    <id>https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/ControlAdjust/</id>
  848.    <link href="https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/ControlAdjust/"/>
  849.    <updated>2019-01-01T13:33:20Z</updated>
  850.    <title>#445 VariableDutyCycle/ControlAdjust</title>
  851.    <summary>using the control pin to adjust duty cycle of a 555 Timer astable oscillator</summary>
  852.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/ControlAdjust/assets/ControlAdjust_build.jpg</g:image_link>
  853.    <category term="555 Timer"/>
  854.    <category term="Oscillators"/>
  855.  </entry>
  856.  <entry>
  857.    <id>https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/DiodeSteering/</id>
  858.    <link href="https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/DiodeSteering/"/>
  859.    <updated>2019-01-01T10:55:42Z</updated>
  860.    <title>#444 VariableDutyCycle/DiodeSteering</title>
  861.    <summary>using diode steering to achieve adjustable duty cycle at fixed frequency in a 555 Timer astable oscillator</summary>
  862.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/DiodeSteering/assets/DiodeSteering_build.jpg</g:image_link>
  863.    <category term="555 Timer"/>
  864.    <category term="Oscillators"/>
  865.  </entry>
  866.  <entry>
  867.    <id>https://leap.tardate.com/STM32/BluePill/LCD16x2/</id>
  868.    <link href="https://leap.tardate.com/STM32/BluePill/LCD16x2/"/>
  869.    <updated>2019-01-01T05:58:40Z</updated>
  870.    <title>#443 BluePill 16x2 LCD</title>
  871.    <summary>using a 16x2 LCD with an ARM Cortex-M3 STM32F103C8T6 Blue Pill board and programmed the Arduino IDE</summary>
  872.    <g:image_link>https://leap.tardate.com/STM32/BluePill/LCD16x2/assets/LCD16x2_build.jpg</g:image_link>
  873.    <category term="STM32"/>
  874.    <category term="LCD"/>
  875.  </entry>
  876.  <entry>
  877.    <id>https://leap.tardate.com/BoldportClub/respot/</id>
  878.    <link href="https://leap.tardate.com/BoldportClub/respot/"/>
  879.    <updated>2019-01-01T04:55:02Z</updated>
  880.    <title>#442 BoldportClub/respot</title>
  881.    <summary>Boldport puts the &quot;pot&quot; back in the resistance, a classic decade resistor box in custom pots</summary>
  882.    <g:image_link>https://leap.tardate.com/BoldportClub/respot/assets/respot_build.jpg</g:image_link>
  883.    <category term="Boldport"/>
  884.    <category term="Tools"/>
  885.    <category term="Test Equipment"/>
  886.  </entry>
  887.  <entry>
  888.    <id>https://leap.tardate.com/Kraft/Pollen8/</id>
  889.    <link href="https://leap.tardate.com/Kraft/Pollen8/"/>
  890.    <updated>2019-01-01T04:55:02Z</updated>
  891.    <title>#441 Pollen8</title>
  892.    <summary>a freeform wire sculpture with LEDs driven by a light-sensitive 555/4017 counter circuit</summary>
  893.    <g:image_link>https://leap.tardate.com/Kraft/Pollen8/assets/Pollen8_build.jpg</g:image_link>
  894.    <category term="LED"/>
  895.    <category term="CMOS/TTL"/>
  896.    <category term="555 Timer"/>
  897.    <category term="Craft"/>
  898.  </entry>
  899.  <entry>
  900.    <id>https://leap.tardate.com/playground/DataLogging/VoltageToAdafruitIO/</id>
  901.    <link href="https://leap.tardate.com/playground/DataLogging/VoltageToAdafruitIO/"/>
  902.    <updated>2019-01-01T04:55:02Z</updated>
  903.    <title>#440 DataLogging/VoltageToAdafruitIO</title>
  904.    <summary>using Adafruit IO and an Ethernet shield to collect analog measurements to the cloud with MQTT</summary>
  905.    <g:image_link>https://leap.tardate.com/playground/DataLogging/VoltageToAdafruitIO/assets/VoltageToAdafruitIO_build.jpg</g:image_link>
  906.    <category term="Sensors"/>
  907.    <category term="Cloud"/>
  908.    <category term="MQTT"/>
  909.    <category term="Data Logging"/>
  910.  </entry>
  911.  <entry>
  912.    <id>https://leap.tardate.com/Electronics101/LedDrivers/QX5252SolarNightLight/</id>
  913.    <link href="https://leap.tardate.com/Electronics101/LedDrivers/QX5252SolarNightLight/"/>
  914.    <updated>2019-01-01T04:55:02Z</updated>
  915.    <title>#439 QX5252SolarNightLight</title>
  916.    <summary>exploring the circuit inside most garden solar lights, which uses a QX5252/YX805 boost and charge controller</summary>
  917.    <g:image_link>https://leap.tardate.com/Electronics101/LedDrivers/QX5252SolarNightLight/assets/QX5252SolarNightLight_build.jpg</g:image_link>
  918.    <category term="Power"/>
  919.    <category term="LED"/>
  920.    <category term="Solar"/>
  921.  </entry>
  922.  <entry>
  923.    <id>https://leap.tardate.com/playground/RFID/DeviceDumper/</id>
  924.    <link href="https://leap.tardate.com/playground/RFID/DeviceDumper/"/>
  925.    <updated>2019-01-01T04:55:02Z</updated>
  926.    <title>#438 RFID Device Dumper</title>
  927.    <summary>getting started with some RFID research and using an RC522 RFID reader with MIFARE Classic cards and tags</summary>
  928.    <g:image_link>https://leap.tardate.com/playground/RFID/DeviceDumper/assets/DeviceDumper_build.jpg</g:image_link>
  929.    <category term="RFID"/>
  930.    <category term="Arduino"/>
  931.  </entry>
  932.  <entry>
  933.    <id>https://leap.tardate.com/Electronics101/LedDrivers/QX5252JouleThief/</id>
  934.    <link href="https://leap.tardate.com/Electronics101/LedDrivers/QX5252JouleThief/"/>
  935.    <updated>2019-01-01T04:55:02Z</updated>
  936.    <title>#437 QX5252JouleThief</title>
  937.    <summary>using a QX5252/YX805 LED driver chip as a joule thief for driving an LED from a low-voltage battery</summary>
  938.    <g:image_link>https://leap.tardate.com/Electronics101/LedDrivers/QX5252JouleThief/assets/QX5252JouleThief_build.jpg</g:image_link>
  939.    <category term="Power"/>
  940.    <category term="LED"/>
  941.  </entry>
  942.  <entry>
  943.    <id>https://leap.tardate.com/Kinetics/BEAM/Vivian/</id>
  944.    <link href="https://leap.tardate.com/Kinetics/BEAM/Vivian/"/>
  945.    <updated>2019-01-01T04:55:02Z</updated>
  946.    <title>#436 Vivian</title>
  947.    <summary>a BEAM Vibrobot using a classic solar-powered FLED circuit enhanced with a QX5252/YX805 solar LED driver</summary>
  948.    <g:image_link>https://leap.tardate.com/Kinetics/BEAM/Vivian/assets/Vivian_build.jpg</g:image_link>
  949.    <category term="BEAM"/>
  950.    <category term="Robotics"/>
  951.  </entry>
  952.  <entry>
  953.    <id>https://leap.tardate.com/Kinetics/BEAM/</id>
  954.    <link href="https://leap.tardate.com/Kinetics/BEAM/"/>
  955.    <updated>2019-01-01T04:55:02Z</updated>
  956.    <title>#435 BEAM</title>
  957.    <summary>a quick survey of the BEAM (Biology, Electronics, Aesthetics and Mechanics) field</summary>
  958.    <g:image_link>https://leap.tardate.com/Kinetics/BEAM/assets/BEAM_build.jpg</g:image_link>
  959.    <category term="BEAM"/>
  960.    <category term="Robotics"/>
  961.  </entry>
  962.  <entry>
  963.    <id>https://leap.tardate.com/BoldportClub/krell/</id>
  964.    <link href="https://leap.tardate.com/BoldportClub/krell/"/>
  965.    <updated>2019-01-01T04:55:02Z</updated>
  966.    <title>#434 BoldportClub/krell</title>
  967.    <summary>building the Boldport Krell: a handheld DSP synthesiser built around a Microchip dsPIC and a design from madlab</summary>
  968.    <g:image_link>https://leap.tardate.com/BoldportClub/krell/assets/krell_build.jpg</g:image_link>
  969.    <category term="Boldport"/>
  970.    <category term="PCB Design"/>
  971.    <category term="Audio"/>
  972.  </entry>
  973.  <entry>
  974.    <id>https://leap.tardate.com/Equipment/AdjustablePowerSupplyKit/</id>
  975.    <link href="https://leap.tardate.com/Equipment/AdjustablePowerSupplyKit/"/>
  976.    <updated>2018-11-11T14:28:17Z</updated>
  977.    <title>#433 AdjustablePowerSupplyKit</title>
  978.    <summary>building a popular 30V/3A adjustable power supply kit, making an enclosure and testing</summary>
  979.    <g:image_link>https://leap.tardate.com/Equipment/AdjustablePowerSupplyKit/assets/AdjustablePowerSupplyKit_build.jpg</g:image_link>
  980.    <category term="Power"/>
  981.  </entry>
  982.  <entry>
  983.    <id>https://leap.tardate.com/Kinetics/StepperMotors/ULN2003Module/</id>
  984.    <link href="https://leap.tardate.com/Kinetics/StepperMotors/ULN2003Module/"/>
  985.    <updated>2018-11-04T15:38:01Z</updated>
  986.    <title>#432 StepperMotors/ULN2003Module</title>
  987.    <summary>investigating the common ULN2003A modules provided for unipolar stepper motor control - this one is identified as X113647</summary>
  988.    <g:image_link>https://leap.tardate.com/Kinetics/StepperMotors/ULN2003Module/assets/ULN2003Module_build.jpg</g:image_link>
  989.    <category term="Stepper"/>
  990.    <category term="ULN2003"/>
  991.  </entry>
  992.  <entry>
  993.    <id>https://leap.tardate.com/Kinetics/StepperMotors/28BYJ48/</id>
  994.    <link href="https://leap.tardate.com/Kinetics/StepperMotors/28BYJ48/"/>
  995.    <updated>2018-11-04T15:38:01Z</updated>
  996.    <title>#431 StepperMotors/28BYJ48</title>
  997.    <summary>all about the 28BYJ-48 unipolar stepper motor and driving it with an Arduino</summary>
  998.    <g:image_link>https://leap.tardate.com/Kinetics/StepperMotors/28BYJ48/assets/28BYJ48_build.jpg</g:image_link>
  999.    <category term="Stepper"/>
  1000.    <category term="Arduino"/>
  1001.  </entry>
  1002.  <entry>
  1003.    <id>https://leap.tardate.com/Kinetics/StepperMotors/BipolarWormDrive/SimpleHBridge/</id>
  1004.    <link href="https://leap.tardate.com/Kinetics/StepperMotors/BipolarWormDrive/SimpleHBridge/"/>
  1005.    <updated>2018-11-04T15:38:01Z</updated>
  1006.    <title>#430 BipolarWormDrive/SimpleHBridge</title>
  1007.    <summary>testing some linear/worm-drive stepper motors salvaged from a DVD drive unit, using a bespoke H-bridge circuit and Arduino .. or pushbuttons!</summary>
  1008.    <g:image_link>https://leap.tardate.com/Kinetics/StepperMotors/BipolarWormDrive/SimpleHBridge/assets/SimpleHBridge_build.jpg</g:image_link>
  1009.    <category term="Stepper"/>
  1010.    <category term="Arduino"/>
  1011.  </entry>
  1012.  <entry>
  1013.    <id>https://leap.tardate.com/BoldportClub/3x7/PomodoroTimer/</id>
  1014.    <link href="https://leap.tardate.com/BoldportClub/3x7/PomodoroTimer/"/>
  1015.    <updated>2018-10-27T03:24:49Z</updated>
  1016.    <title>#429 3x7/PomodoroTimer</title>
  1017.    <summary>a Pomodoro timer wire sculpture using the Boldport 3x7 display and an ATmega328</summary>
  1018.    <g:image_link>https://leap.tardate.com/BoldportClub/3x7/PomodoroTimer/assets/PomodoroTimer_build.jpg</g:image_link>
  1019.    <category term="Boldport"/>
  1020.    <category term="7-Segment"/>
  1021.    <category term="ATmel"/>
  1022.  </entry>
  1023.  <entry>
  1024.    <id>https://leap.tardate.com/BoldportClub/3x7/LRThreeDigitDemo/</id>
  1025.    <link href="https://leap.tardate.com/BoldportClub/3x7/LRThreeDigitDemo/"/>
  1026.    <updated>2018-10-27T03:24:49Z</updated>
  1027.    <title>#428 3x7 LRThreeDigitDemo</title>
  1028.    <summary>driving the Boldport 3x7 display from a Cuttle (Arduino) and the LRThreeDigits library</summary>
  1029.    <g:image_link>https://leap.tardate.com/BoldportClub/3x7/LRThreeDigitDemo/assets/LRThreeDigitDemo_build.jpg</g:image_link>
  1030.    <category term="Boldport"/>
  1031.    <category term="7-Segment"/>
  1032.    <category term="Arduino"/>
  1033.  </entry>
  1034.  <entry>
  1035.    <id>https://leap.tardate.com/playground/ATtiny/SoftwarePWM/</id>
  1036.    <link href="https://leap.tardate.com/playground/ATtiny/SoftwarePWM/"/>
  1037.    <updated>2018-10-21T07:22:34Z</updated>
  1038.    <title>#427 ATtiny/SoftwarePWM</title>
  1039.    <summary>generating arbitrary PWM signals with an ATtiny85 and bit-banging techniques</summary>
  1040.    <g:image_link>https://leap.tardate.com/playground/ATtiny/SoftwarePWM/assets/SoftwarePWM_build.jpg</g:image_link>
  1041.    <category term="ATmel"/>
  1042.    <category term="PWM"/>
  1043.  </entry>
  1044.  <entry>
  1045.    <id>https://leap.tardate.com/BoldportClub/3x7/RippleTester/</id>
  1046.    <link href="https://leap.tardate.com/BoldportClub/3x7/RippleTester/"/>
  1047.    <updated>2018-10-19T10:19:59Z</updated>
  1048.    <title>#426 3x7 RippleTester </title>
  1049.    <summary>using some 4000 series counters (CD4017, CD4060) to exercise the digits and segments of the Boldport 3x7</summary>
  1050.    <g:image_link>https://leap.tardate.com/BoldportClub/3x7/RippleTester/assets/RippleTester_build.jpg</g:image_link>
  1051.    <category term="Boldport"/>
  1052.    <category term="7-Segment"/>
  1053.    <category term="CMOS/TTL"/>
  1054.  </entry>
  1055.  <entry>
  1056.    <id>https://leap.tardate.com/BoldportClub/3x7/</id>
  1057.    <link href="https://leap.tardate.com/BoldportClub/3x7/"/>
  1058.    <updated>2018-10-19T10:19:59Z</updated>
  1059.    <title>#425 BoldportClub/3x7</title>
  1060.    <summary>building the Boldport 3x7, Project #29, with custom flip-top layout so you can see inside this discrete 3-digit, 7-segment display</summary>
  1061.    <g:image_link>https://leap.tardate.com/BoldportClub/3x7/assets/3x7_build.jpg</g:image_link>
  1062.    <category term="Boldport"/>
  1063.    <category term="7-Segment"/>
  1064.  </entry>
  1065.  <entry>
  1066.    <id>https://leap.tardate.com/playground/VL53L0X/TheToneRanger/</id>
  1067.    <link href="https://leap.tardate.com/playground/VL53L0X/TheToneRanger/"/>
  1068.    <updated>2018-10-14T13:32:30Z</updated>
  1069.    <title>#424 TheToneRanger</title>
  1070.    <summary>a simple modification of the basic VL53L0X example to add audio indication of range</summary>
  1071.    <g:image_link>https://leap.tardate.com/playground/VL53L0X/TheToneRanger/assets/TheToneRanger_build.jpg</g:image_link>
  1072.    <category term="Arduino"/>
  1073.    <category term="Sensors"/>
  1074.    <category term="Audio"/>
  1075.  </entry>
  1076.  <entry>
  1077.    <id>https://leap.tardate.com/playground/MakerUno/</id>
  1078.    <link href="https://leap.tardate.com/playground/MakerUno/"/>
  1079.    <updated>2018-10-14T13:32:30Z</updated>
  1080.    <title>#423 MakerUno</title>
  1081.    <summary>checking out the Maker UNO, a feature-packed Arduino-compatible board from Cytron in Penang, Malaysia</summary>
  1082.    <g:image_link>https://leap.tardate.com/playground/MakerUno/assets/MakerUno_build.jpg</g:image_link>
  1083.    <category term="Arduino"/>
  1084.  </entry>
  1085.  <entry>
  1086.    <id>https://leap.tardate.com/playground/VL53L0X/LaserTapeMeasure/</id>
  1087.    <link href="https://leap.tardate.com/playground/VL53L0X/LaserTapeMeasure/"/>
  1088.    <updated>2018-10-11T11:56:03Z</updated>
  1089.    <title>#422 LaserTapeMeasure</title>
  1090.    <summary>using a VL53L0X ranging sensor to make a short-range laser tape measure with an Arduino with Nokia 5110 display</summary>
  1091.    <g:image_link>https://leap.tardate.com/playground/VL53L0X/LaserTapeMeasure/assets/LaserTapeMeasure_build.jpg</g:image_link>
  1092.    <category term="Sensors"/>
  1093.    <category term="Arduino"/>
  1094.    <category term="LCD"/>
  1095.  </entry>
  1096.  <entry>
  1097.    <id>https://leap.tardate.com/Radio/SDR/LimeSDR/FirstLook/</id>
  1098.    <link href="https://leap.tardate.com/Radio/SDR/LimeSDR/FirstLook/"/>
  1099.    <updated>2019-09-29T13:47:06Z</updated>
  1100.    <title>#421 LimeSDR First Look</title>
  1101.    <summary>unboxing and first test of the LimeSDR-USB software-defined radio with MacOSX host</summary>
  1102.    <g:image_link>https://leap.tardate.com/Radio/SDR/LimeSDR/FirstLook/assets/FirstLook_build.jpg</g:image_link>
  1103.    <category term="SDR"/>
  1104.  </entry>
  1105.  <entry>
  1106.    <id>https://leap.tardate.com/BoldportClub/lite2sound-bc/CuttleTalk/</id>
  1107.    <link href="https://leap.tardate.com/BoldportClub/lite2sound-bc/CuttleTalk/"/>
  1108.    <updated>2018-10-07T15:29:04Z</updated>
  1109.    <title>#420 CuttleTalk</title>
  1110.    <summary>playing audio from a Boldport Cuttle (Arduino) over LiFi with lite2sound</summary>
  1111.    <g:image_link>https://leap.tardate.com/BoldportClub/lite2sound-bc/CuttleTalk/assets/CuttleTalk_build.jpg</g:image_link>
  1112.    <category term="Boldport"/>
  1113.    <category term="Audio"/>
  1114.    <category term="LiFi"/>
  1115.  </entry>
  1116.  <entry>
  1117.    <id>https://leap.tardate.com/BoldportClub/lite2sound-bc/</id>
  1118.    <link href="https://leap.tardate.com/BoldportClub/lite2sound-bc/"/>
  1119.    <updated>2018-10-07T15:29:04Z</updated>
  1120.    <title>#419 BoldportClub/lite2sound-bc</title>
  1121.    <summary>building Lite2Sound Boldport Club Project #26</summary>
  1122.    <g:image_link>https://leap.tardate.com/BoldportClub/lite2sound-bc/assets/lite2sound-bc_build.jpg</g:image_link>
  1123.    <category term="Boldport"/>
  1124.    <category term="PCB Design"/>
  1125.    <category term="Audio"/>
  1126.  </entry>
  1127.  <entry>
  1128.    <id>https://leap.tardate.com/Electronics101/Oscillators/CommonEmitterHartley/</id>
  1129.    <link href="https://leap.tardate.com/Electronics101/Oscillators/CommonEmitterHartley/"/>
  1130.    <updated>2018-10-06T12:58:56Z</updated>
  1131.    <title>#418 CommonEmitterHartley</title>
  1132.    <summary>build and test a BJT common-emitter Hartley oscillator</summary>
  1133.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/CommonEmitterHartley/assets/CommonEmitterHartley_build.jpg</g:image_link>
  1134.    <category term="BJT"/>
  1135.    <category term="Oscillators"/>
  1136.  </entry>
  1137.  <entry>
  1138.    <id>https://leap.tardate.com/playground/Audio/SimpleSamplePlayer/</id>
  1139.    <link href="https://leap.tardate.com/playground/Audio/SimpleSamplePlayer/"/>
  1140.    <updated>2018-10-04T15:23:48Z</updated>
  1141.    <title>#417 SimpleSamplePlayer</title>
  1142.    <summary>playing short audio samples on an Arduino using some PWM tricks from the PCM library</summary>
  1143.    <g:image_link>https://leap.tardate.com/playground/Audio/SimpleSamplePlayer/assets/SimpleSamplePlayer_build.jpg</g:image_link>
  1144.    <category term="Audio"/>
  1145.    <category term="Arduino"/>
  1146.    <category term="PWM"/>
  1147.  </entry>
  1148.  <entry>
  1149.    <id>https://leap.tardate.com/Kinetics/LineFollowerKit/</id>
  1150.    <link href="https://leap.tardate.com/Kinetics/LineFollowerKit/"/>
  1151.    <updated>2018-10-02T15:49:18Z</updated>
  1152.    <title>#416 LineFollowerKit</title>
  1153.    <summary>building the D2-5 Intelligent Line Tracking Car Kit - a nice demonstration of a simple feedback control system with an LM358 op-amp</summary>
  1154.    <g:image_link>https://leap.tardate.com/Kinetics/LineFollowerKit/assets/LineFollowerKit_build.jpg</g:image_link>
  1155.    <category term="Sensors"/>
  1156.    <category term="Kinetics"/>
  1157.    <category term="OpAmp"/>
  1158.  </entry>
  1159.  <entry>
  1160.    <id>https://leap.tardate.com/Electronics101/555Timer/NixiePowerSupply/</id>
  1161.    <link href="https://leap.tardate.com/Electronics101/555Timer/NixiePowerSupply/"/>
  1162.    <updated>2018-09-29T11:06:03Z</updated>
  1163.    <title>#415 Nixie Power Supply - 555 Timer Version</title>
  1164.    <summary>using a 555 boost converter to test some Nixie IN3 and IN14 tubes</summary>
  1165.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/NixiePowerSupply/assets/NixiePowerSupply_build.jpg</g:image_link>
  1166.    <category term="Power"/>
  1167.    <category term="Nixie"/>
  1168.    <category term="555 Timer"/>
  1169.  </entry>
  1170.  <entry>
  1171.    <id>https://leap.tardate.com/Electronics101/DecadeProgrammableResistor/</id>
  1172.    <link href="https://leap.tardate.com/Electronics101/DecadeProgrammableResistor/"/>
  1173.    <updated>2018-09-17T16:54:22Z</updated>
  1174.    <title>#414 Decade Programmable Resistor</title>
  1175.    <summary>building an old-fashioned 7-digit decade programmable resistor with push-button control</summary>
  1176.    <g:image_link>https://leap.tardate.com/Electronics101/DecadeProgrammableResistor/assets/DecadeProgrammableResistor_build.jpg</g:image_link>
  1177.    <category term="Test Equipment"/>
  1178.  </entry>
  1179.  <entry>
  1180.    <id>https://leap.tardate.com/Electronics101/RotaryEncoders/IncrementalTester/</id>
  1181.    <link href="https://leap.tardate.com/Electronics101/RotaryEncoders/IncrementalTester/"/>
  1182.    <updated>2018-09-17T16:54:22Z</updated>
  1183.    <title>#413 Rotary Encoder Tester</title>
  1184.    <summary>demonstrating a rotary encoder forward/reverse LED indicator using simple digital logic</summary>
  1185.    <g:image_link>https://leap.tardate.com/Electronics101/RotaryEncoders/IncrementalTester/assets/IncrementalTester_build.jpg</g:image_link>
  1186.    <category term="Sensor"/>
  1187.    <category term="CMOS/TTL"/>
  1188.  </entry>
  1189.  <entry>
  1190.    <id>https://leap.tardate.com/Electronics101/BJT/Comparator/</id>
  1191.    <link href="https://leap.tardate.com/Electronics101/BJT/Comparator/"/>
  1192.    <updated>2018-08-30T03:47:18Z</updated>
  1193.    <title>#412 BJT Comparator</title>
  1194.    <summary>investigating and testing a comparator design with discrete components</summary>
  1195.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/Comparator/assets/Comparator_build.jpg</g:image_link>
  1196.    <category term="BJT"/>
  1197.    <category term="Comparator"/>
  1198.  </entry>
  1199.  <entry>
  1200.    <id>https://leap.tardate.com/BoldportClub/cordwood-three/</id>
  1201.    <link href="https://leap.tardate.com/BoldportClub/cordwood-three/"/>
  1202.    <updated>2018-08-23T15:04:09Z</updated>
  1203.    <title>#411 BoldportClub/cordwood-three</title>
  1204.    <summary>custom build of the Boldport Club Cordwood Puzzle III, Project #25, May 2018, with an archway layout and a spring-loaded LED trigger machanism</summary>
  1205.    <g:image_link>https://leap.tardate.com/BoldportClub/cordwood-three/assets/cordwood-three_build.jpg</g:image_link>
  1206.    <category term="Boldport"/>
  1207.    <category term="LED"/>
  1208.  </entry>
  1209.  <entry>
  1210.    <id>https://leap.tardate.com/Kinetics/HomopolarJouleThiefBlinky/</id>
  1211.    <link href="https://leap.tardate.com/Kinetics/HomopolarJouleThiefBlinky/"/>
  1212.    <updated>2018-08-12T16:16:08Z</updated>
  1213.    <title>#410 HomopolarJouleThiefBlinky</title>
  1214.    <summary>a totally Rube-Goldberg contraption for blinking an LED with a AAA battery, homopolar motor and joule thief mechanisms</summary>
  1215.    <g:image_link>https://leap.tardate.com/Kinetics/HomopolarJouleThiefBlinky/assets/HomopolarJouleThiefBlinky_build.jpg</g:image_link>
  1216.    <category term="Kinetics"/>
  1217.    <category term="LED"/>
  1218.    <category term="Oscillators"/>
  1219.  </entry>
  1220.  <entry>
  1221.    <id>https://leap.tardate.com/BoldportClub/conehead/</id>
  1222.    <link href="https://leap.tardate.com/BoldportClub/conehead/"/>
  1223.    <updated>2018-08-12T16:16:08Z</updated>
  1224.    <title>#409 BoldportClub/conehead</title>
  1225.    <summary>the Conehead is the fourth in the Boldport Club series of beautiful electronic critters, Project #24 April 2018</summary>
  1226.    <g:image_link>https://leap.tardate.com/BoldportClub/conehead/assets/conehead_build.jpg</g:image_link>
  1227.    <category term="Boldport"/>
  1228.    <category term="Oscillators"/>
  1229.    <category term="CMOS/TTL"/>
  1230.    <category term="Audio"/>
  1231.  </entry>
  1232.  <entry>
  1233.    <id>https://leap.tardate.com/Electronics101/Power/BBBreakout/</id>
  1234.    <link href="https://leap.tardate.com/Electronics101/Power/BBBreakout/"/>
  1235.    <updated>2018-08-05T08:52:10Z</updated>
  1236.    <title>#408 BBBreakout</title>
  1237.    <summary>a little breadboard power adapter and breakout with 5.5x2.1mm barrel jack, terminal block and XH2.54 connectors</summary>
  1238.    <g:image_link>https://leap.tardate.com/Electronics101/Power/BBBreakout/assets/BBBreakout_build.jpg</g:image_link>
  1239.    <category term="Power"/>
  1240.  </entry>
  1241.  <entry>
  1242.    <id>https://leap.tardate.com/Equipment/DPS3005BenchPowerSupply/</id>
  1243.    <link href="https://leap.tardate.com/Equipment/DPS3005BenchPowerSupply/"/>
  1244.    <updated>2018-08-04T11:34:22Z</updated>
  1245.    <title>#407 DPS3005BenchPowerSupply</title>
  1246.    <summary>building an AC-powered 32V/5A variable bench power supply based on the DPS3005 DC power supply module and rectified step-down transformer</summary>
  1247.    <g:image_link>https://leap.tardate.com/Equipment/DPS3005BenchPowerSupply/assets/DPS3005BenchPowerSupply_build.jpg</g:image_link>
  1248.    <category term="Power"/>
  1249.    <category term="Tools"/>
  1250.  </entry>
  1251.  <entry>
  1252.    <id>https://leap.tardate.com/Electronics101/SerialInterface/UsbUartCH340G/</id>
  1253.    <link href="https://leap.tardate.com/Electronics101/SerialInterface/UsbUartCH340G/"/>
  1254.    <updated>2019-11-20T11:41:26Z</updated>
  1255.    <title>#406 Custom CH340G USB to UART interface</title>
  1256.    <summary>build a USB to TTL serial interface on a breadboard using the CH340G interface chip, and use it to program Arduino sketches on an ATmega328P</summary>
  1257.    <g:image_link>https://leap.tardate.com/Electronics101/SerialInterface/UsbUartCH340G/assets/UsbUartCH340G_build.jpg</g:image_link>
  1258.    <category term="USB"/>
  1259.    <category term="Serial"/>
  1260.    <category term="CH340"/>
  1261.  </entry>
  1262.  <entry>
  1263.    <id>https://leap.tardate.com/playground/ATmegaSerialProgrammer/</id>
  1264.    <link href="https://leap.tardate.com/playground/ATmegaSerialProgrammer/"/>
  1265.    <updated>2018-07-29T10:09:32Z</updated>
  1266.    <title>#405 ATmegaSerialProgrammer</title>
  1267.    <summary>all about bootloaders and how to program an ATMEGA328P chip over a serial connection with a CH340G USB-Serial adapter instead of ICSP</summary>
  1268.    <g:image_link>https://leap.tardate.com/playground/ATmegaSerialProgrammer/assets/ATmegaSerialProgrammer_build.jpg</g:image_link>
  1269.    <category term="Arduino"/>
  1270.    <category term="ATmel"/>
  1271.    <category term="ICSP"/>
  1272.    <category term="UART"/>
  1273.  </entry>
  1274.  <entry>
  1275.    <id>https://leap.tardate.com/Kraft/arzamatron/</id>
  1276.    <link href="https://leap.tardate.com/Kraft/arzamatron/"/>
  1277.    <updated>2018-07-22T14:45:31Z</updated>
  1278.    <title>#404 Arza-matron</title>
  1279.    <summary>whipping together a simple sound-activated party decoration with the other half of the Fretboard guitar some LED strips</summary>
  1280.    <g:image_link>https://leap.tardate.com/Kraft/arzamatron/assets/arzamatron_build.jpg</g:image_link>
  1281.    <category term="Arduino"/>
  1282.    <category term="LED"/>
  1283.    <category term="Sensors"/>
  1284.    <category term="Craft"/>
  1285.  </entry>
  1286.  <entry>
  1287.    <id>https://leap.tardate.com/Equipment/GY560/</id>
  1288.    <link href="https://leap.tardate.com/Equipment/GY560/"/>
  1289.    <updated>2018-07-08T04:39:44Z</updated>
  1290.    <title>#403 GY560</title>
  1291.    <summary>checking out the GY560 Frequency Counter</summary>
  1292.    <g:image_link>https://leap.tardate.com/Equipment/GY560/assets/GY560_build.jpg</g:image_link>
  1293.    <category term="Radio"/>
  1294.    <category term="Tools"/>
  1295.    <category term="Test Equipment"/>
  1296.  </entry>
  1297.  <entry>
  1298.    <id>https://leap.tardate.com/BoldportClub/pips/</id>
  1299.    <link href="https://leap.tardate.com/BoldportClub/pips/"/>
  1300.    <updated>2018-07-07T04:47:34Z</updated>
  1301.    <title>#402 BoldportClub/pips</title>
  1302.    <summary>rolling the BoldportClub Pips (Project #23) - a classic Elektor die circuit using the CD4060 ripple counter</summary>
  1303.    <g:image_link>https://leap.tardate.com/BoldportClub/pips/assets/pips_build.jpg</g:image_link>
  1304.    <category term="Boldport"/>
  1305.    <category term="CD4060"/>
  1306.  </entry>
  1307.  <entry>
  1308.    <id>https://leap.tardate.com/Radio/pixie/</id>
  1309.    <link href="https://leap.tardate.com/Radio/pixie/"/>
  1310.    <updated>2018-07-07T04:47:34Z</updated>
  1311.    <title>#401 Pixie</title>
  1312.    <summary>research the history and variants of the Pixie QRP transceiver, and build a basic Pixie 4.3 kit on 40m</summary>
  1313.    <g:image_link>https://leap.tardate.com/Radio/pixie/assets/pixie_build.jpg</g:image_link>
  1314.    <category term="Radio"/>
  1315.  </entry>
  1316.  <entry>
  1317.    <id>https://leap.tardate.com/Equipment/USBProtector/</id>
  1318.    <link href="https://leap.tardate.com/Equipment/USBProtector/"/>
  1319.    <updated>2018-07-02T00:07:52Z</updated>
  1320.    <title>#400 USBProtector</title>
  1321.    <summary>building the Silicon Chip USB Protector which demonstrates various methods of reverse-polarity, over-voltage and over-current protection</summary>
  1322.    <g:image_link>https://leap.tardate.com/Equipment/USBProtector/assets/USBProtector_build.jpg</g:image_link>
  1323.    <category term="Power"/>
  1324.    <category term="USB"/>
  1325.    <category term="Tools"/>
  1326.    <category term="Test Equipment"/>
  1327.  </entry>
  1328.  <entry>
  1329.    <id>https://leap.tardate.com/8051/AT89C2051/LedChaser/</id>
  1330.    <link href="https://leap.tardate.com/8051/AT89C2051/LedChaser/"/>
  1331.    <updated>2018-07-02T00:07:52Z</updated>
  1332.    <title>#399 AT89C2051/LedChaser</title>
  1333.    <summary>run an LED chaser with an AT89C2051 using interrupts for timing; C source compiled with SDCC on MacOSX</summary>
  1334.    <g:image_link>https://leap.tardate.com/8051/AT89C2051/LedChaser/assets/LedChaser_build.jpg</g:image_link>
  1335.    <category term="8051"/>
  1336.    <category term="LED"/>
  1337.  </entry>
  1338.  <entry>
  1339.    <id>https://leap.tardate.com/playground/LCD/I2CAdapter/</id>
  1340.    <link href="https://leap.tardate.com/playground/LCD/I2CAdapter/"/>
  1341.    <updated>2018-06-10T15:09:40Z</updated>
  1342.    <title>#398 LCD I2C Adapter</title>
  1343.    <summary>using an I²C adapter to reduce the Arduino pins needed to drive an LCD</summary>
  1344.    <g:image_link>https://leap.tardate.com/playground/LCD/I2CAdapter/assets/I2CAdapter_build.jpg</g:image_link>
  1345.    <category term="LCD"/>
  1346.    <category term="I2C"/>
  1347.  </entry>
  1348.  <entry>
  1349.    <id>https://leap.tardate.com/playground/I2CScanner/</id>
  1350.    <link href="https://leap.tardate.com/playground/I2CScanner/"/>
  1351.    <updated>2018-06-10T15:09:40Z</updated>
  1352.    <title>#397 I2CScanner</title>
  1353.    <summary>scanning for I²C devices with an Arduino</summary>
  1354.    <g:image_link>https://leap.tardate.com/playground/I2CScanner/assets/I2CScanner_build.jpg</g:image_link>
  1355.    <category term="I2C"/>
  1356.    <category term="Arduino"/>
  1357.  </entry>
  1358.  <entry>
  1359.    <id>https://leap.tardate.com/playground/CapacitiveTouchOrgan/</id>
  1360.    <link href="https://leap.tardate.com/playground/CapacitiveTouchOrgan/"/>
  1361.    <updated>2018-06-10T10:23:18Z</updated>
  1362.    <title>#396 CapacitiveTouchOrgan</title>
  1363.    <summary>a simple chromatic scale organ, controlled with a Freescale/NXP MPR121 Proximity Capacitive Touch Sensor and an Arduino</summary>
  1364.    <g:image_link>https://leap.tardate.com/playground/CapacitiveTouchOrgan/assets/CapacitiveTouchOrgan_build.jpg</g:image_link>
  1365.    <category term="Audio"/>
  1366.    <category term="Sensors"/>
  1367.    <category term="MPR121"/>
  1368.  </entry>
  1369.  <entry>
  1370.    <id>https://leap.tardate.com/8051/AT89C2051/Blinky/</id>
  1371.    <link href="https://leap.tardate.com/8051/AT89C2051/Blinky/"/>
  1372.    <updated>2018-06-06T15:28:00Z</updated>
  1373.    <title>#395 AT89C2051/Blinky</title>
  1374.    <summary>Simplest LED blinky program in C for the AT89C2051(8051/MCS51) microprocessor, built with the SDCC open-source toolchain on MacOSX</summary>
  1375.    <g:image_link>https://leap.tardate.com/8051/AT89C2051/Blinky/assets/Blinky_build.jpg</g:image_link>
  1376.    <category term="8051"/>
  1377.    <category term="LED"/>
  1378.  </entry>
  1379.  <entry>
  1380.    <id>https://leap.tardate.com/8051/AT89C2051/Programmer/</id>
  1381.    <link href="https://leap.tardate.com/8051/AT89C2051/Programmer/"/>
  1382.    <updated>2018-06-06T15:28:00Z</updated>
  1383.    <title>#394 AT89C2051/Programmer</title>
  1384.    <summary>building a programmer for the Intel MCS-51/8051 compatible AT89C2051, with host software running on MacOSX</summary>
  1385.    <g:image_link>https://leap.tardate.com/8051/AT89C2051/Programmer/assets/Programmer_build.jpg</g:image_link>
  1386.    <category term="8051"/>
  1387.  </entry>
  1388.  <entry>
  1389.    <id>https://leap.tardate.com/playground/DicksonChargePump/</id>
  1390.    <link href="https://leap.tardate.com/playground/DicksonChargePump/"/>
  1391.    <updated>2018-06-06T15:28:00Z</updated>
  1392.    <title>#393 DicksonChargePump</title>
  1393.    <summary>Zener-regulated 12V Dickson Charge Pump driven with Arduino PWM</summary>
  1394.    <g:image_link>https://leap.tardate.com/playground/DicksonChargePump/assets/DicksonChargePump_build.jpg</g:image_link>
  1395.    <category term="Arduino"/>
  1396.    <category term="Power"/>
  1397.  </entry>
  1398.  <entry>
  1399.    <id>https://leap.tardate.com/BoldportClub/whiteboard/</id>
  1400.    <link href="https://leap.tardate.com/BoldportClub/whiteboard/"/>
  1401.    <updated>2018-05-27T13:43:11Z</updated>
  1402.    <title>#392 BoldportClub/whiteboard</title>
  1403.    <summary>building the Whiteboard (Boldport Club project #22), a breadboard enhancer featuring variable and coin-cell power supplies and prototyping areas. Demonstrated with a 4-stage CD4060 ripple counter</summary>
  1404.    <g:image_link>https://leap.tardate.com/BoldportClub/whiteboard/assets/whiteboard_build.jpg</g:image_link>
  1405.    <category term="Boldport"/>
  1406.    <category term="LM317"/>
  1407.    <category term="CD4060"/>
  1408.  </entry>
  1409.  <entry>
  1410.    <id>https://leap.tardate.com/Equipment/MilliVoltmeterDIY/CustomBoardAndEnclosure/</id>
  1411.    <link href="https://leap.tardate.com/Equipment/MilliVoltmeterDIY/CustomBoardAndEnclosure/"/>
  1412.    <updated>2018-05-25T15:54:24Z</updated>
  1413.    <title>#391 MilliVoltmeterDIY PCB and Enclosure</title>
  1414.    <summary>custom PCB and enclosure for the ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference</summary>
  1415.    <g:image_link>https://leap.tardate.com/Equipment/MilliVoltmeterDIY/CustomBoardAndEnclosure/assets/CustomBoardAndEnclosure_build.jpg</g:image_link>
  1416.    <category term="ATmega"/>
  1417.    <category term="ADC"/>
  1418.    <category term="Tools"/>
  1419.    <category term="Test Equipment"/>
  1420.  </entry>
  1421.  <entry>
  1422.    <id>https://leap.tardate.com/PIC/GettingBlinky/UsingC/</id>
  1423.    <link href="https://leap.tardate.com/PIC/GettingBlinky/UsingC/"/>
  1424.    <updated>2018-05-25T15:54:24Z</updated>
  1425.    <title>#390 PIC/GettingBlinky/UsingC</title>
  1426.    <summary>getting up and running building XC8 C projects on MacOSX and a PIC12F675. Let's get Blinky again!</summary>
  1427.    <g:image_link>https://leap.tardate.com/PIC/GettingBlinky/UsingC/assets/UsingC_build.jpg</g:image_link>
  1428.    <category term="PIC"/>
  1429.    <category term="LED"/>
  1430.  </entry>
  1431.  <entry>
  1432.    <id>https://leap.tardate.com/Electronics101/BJT/TwoStageCommonEmitterAmplifier/</id>
  1433.    <link href="https://leap.tardate.com/Electronics101/BJT/TwoStageCommonEmitterAmplifier/"/>
  1434.    <updated>2018-05-14T13:20:09Z</updated>
  1435.    <title>#389 Two-stage Common Emitter Amplifier</title>
  1436.    <summary>designing a two-stage common-emitter BJT amplifier</summary>
  1437.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/TwoStageCommonEmitterAmplifier/assets/TwoStageCommonEmitterAmplifier_build.jpg</g:image_link>
  1438.    <category term="BJT"/>
  1439.    <category term="Amplifier"/>
  1440.  </entry>
  1441.  <entry>
  1442.    <id>https://leap.tardate.com/Radio/SingaporeBands/</id>
  1443.    <link href="https://leap.tardate.com/Radio/SingaporeBands/"/>
  1444.    <updated>2018-05-07T13:19:58Z</updated>
  1445.    <title>#388 SingaporeBands</title>
  1446.    <summary>notes on official band plans for Singapore and my and personal observations on where the activity is found</summary>
  1447.    <g:image_link>https://leap.tardate.com/Radio/SingaporeBands/assets/SingaporeBands_build.jpg</g:image_link>
  1448.    <category term="Radio"/>
  1449.  </entry>
  1450.  <entry>
  1451.    <id>https://leap.tardate.com/playground/GpsBasics/</id>
  1452.    <link href="https://leap.tardate.com/playground/GpsBasics/"/>
  1453.    <updated>2018-05-06T08:02:57Z</updated>
  1454.    <title>#387 GpsBasics</title>
  1455.    <summary>using a NEMA-compatible GPS module for time and location with an Arduino</summary>
  1456.    <g:image_link>https://leap.tardate.com/playground/GpsBasics/assets/GpsBasics_build.jpg</g:image_link>
  1457.    <category term="GPS"/>
  1458.    <category term="Arduino"/>
  1459.  </entry>
  1460.  <entry>
  1461.    <id>https://leap.tardate.com/STM32/BluePill/</id>
  1462.    <link href="https://leap.tardate.com/STM32/BluePill/"/>
  1463.    <updated>2018-05-02T16:55:49Z</updated>
  1464.    <title>#386 BluePill</title>
  1465.    <summary>programming an ARM Cortex-M3 STM32F103C8T6 Blue Pill board with the Arduino IDE</summary>
  1466.    <g:image_link>https://leap.tardate.com/STM32/BluePill/assets/BluePill_build.jpg</g:image_link>
  1467.    <category term="STM32"/>
  1468.  </entry>
  1469.  <entry>
  1470.    <id>https://leap.tardate.com/BoldportClub/widlar/</id>
  1471.    <link href="https://leap.tardate.com/BoldportClub/widlar/"/>
  1472.    <updated>2018-05-02T16:55:49Z</updated>
  1473.    <title>#385 BoldportClub/widlar</title>
  1474.    <summary>hacking the BoldportClub Widlar (Project #21) to get the classic μA723 to do something other than voltage regulation (LED blinky)</summary>
  1475.    <g:image_link>https://leap.tardate.com/BoldportClub/widlar/assets/widlar_build.jpg</g:image_link>
  1476.    <category term="723"/>
  1477.    <category term="Power"/>
  1478.    <category term="Oscillator"/>
  1479.  </entry>
  1480.  <entry>
  1481.    <id>https://leap.tardate.com/Electronics101/LM723/HighVoltageRegulator/</id>
  1482.    <link href="https://leap.tardate.com/Electronics101/LM723/HighVoltageRegulator/"/>
  1483.    <updated>2018-04-29T15:36:28Z</updated>
  1484.    <title>#384 LM723/HighVoltageRegulator</title>
  1485.    <summary>playing with the basic high voltage output circuit for the LM723 voltage regulator</summary>
  1486.    <g:image_link>https://leap.tardate.com/Electronics101/LM723/HighVoltageRegulator/assets/HighVoltageRegulator_build.jpg</g:image_link>
  1487.    <category term="Power"/>
  1488.    <category term="Regulator"/>
  1489.    <category term="LM723"/>
  1490.  </entry>
  1491.  <entry>
  1492.    <id>https://leap.tardate.com/Electronics101/LM723/LowVoltageRegulator/</id>
  1493.    <link href="https://leap.tardate.com/Electronics101/LM723/LowVoltageRegulator/"/>
  1494.    <updated>2018-04-29T15:36:28Z</updated>
  1495.    <title>#383 LM723/LowVoltageRegulator</title>
  1496.    <summary>playing with the basic low voltage output circuit for the LM723 voltage regulator</summary>
  1497.    <g:image_link>https://leap.tardate.com/Electronics101/LM723/LowVoltageRegulator/assets/LowVoltageRegulator_build.jpg</g:image_link>
  1498.    <category term="Power"/>
  1499.    <category term="Regulator"/>
  1500.    <category term="LM723"/>
  1501.  </entry>
  1502.  <entry>
  1503.    <id>https://leap.tardate.com/Electronics101/CD4046/VCO/</id>
  1504.    <link href="https://leap.tardate.com/Electronics101/CD4046/VCO/"/>
  1505.    <updated>2018-04-29T15:36:28Z</updated>
  1506.    <title>#382 CD4046 VCO</title>
  1507.    <summary>audio range voltage-controlled oscillator using the CD4046 PLL/VCO IC</summary>
  1508.    <g:image_link>https://leap.tardate.com/Electronics101/CD4046/VCO/assets/VCO_build.jpg</g:image_link>
  1509.    <category term="RC"/>
  1510.    <category term="CD4046"/>
  1511.    <category term="Oscillators"/>
  1512.  </entry>
  1513.  <entry>
  1514.    <id>https://leap.tardate.com/playground/WaterQualityMonitor/</id>
  1515.    <link href="https://leap.tardate.com/playground/WaterQualityMonitor/"/>
  1516.    <updated>2018-04-29T15:36:28Z</updated>
  1517.    <title>#381 WaterQualityMonitor</title>
  1518.    <summary>a project by oweibo to monitor water quality</summary>
  1519.    <g:image_link>https://leap.tardate.com/playground/WaterQualityMonitor/assets/WaterQualityMonitor_build.jpg</g:image_link>
  1520.    <category term="Arduino"/>
  1521.    <category term="Sensors"/>
  1522.  </entry>
  1523.  <entry>
  1524.    <id>https://leap.tardate.com/playground/tin_counter/</id>
  1525.    <link href="https://leap.tardate.com/playground/tin_counter/"/>
  1526.    <updated>2018-04-29T15:36:28Z</updated>
  1527.    <title>#380 Tin Counter</title>
  1528.    <summary>a project by novaprimexex to count tins as they roll by and detect tins without paper labels</summary>
  1529.    <g:image_link>https://leap.tardate.com/playground/tin_counter/assets/tin_counter_build.jpg</g:image_link>
  1530.    <category term="Arduino"/>
  1531.    <category term="Sensors"/>
  1532.    <category term="HC-SR04"/>
  1533.  </entry>
  1534.  <entry>
  1535.    <id>https://leap.tardate.com/playground/AS3935/</id>
  1536.    <link href="https://leap.tardate.com/playground/AS3935/"/>
  1537.    <updated>2018-04-29T15:36:28Z</updated>
  1538.    <title>#379 AS3935</title>
  1539.    <summary>using the AMS AS3935 Franklin Lightning Sensor with an Arduino with the Wire library</summary>
  1540.    <g:image_link>https://leap.tardate.com/playground/AS3935/assets/AS3935_build.jpg</g:image_link>
  1541.    <category term="Arduino"/>
  1542.    <category term="AS3935"/>
  1543.    <category term="Sensors"/>
  1544.  </entry>
  1545.  <entry>
  1546.    <id>https://leap.tardate.com/Electronics101/BJT/PhaseSplitter/</id>
  1547.    <link href="https://leap.tardate.com/Electronics101/BJT/PhaseSplitter/"/>
  1548.    <updated>2018-02-13T01:35:19Z</updated>
  1549.    <title>#378 BJT Phase Splitter</title>
  1550.    <summary>simple unity-gain phase splitter in a little breadboard-compatible package</summary>
  1551.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/PhaseSplitter/assets/PhaseSplitter_build.jpg</g:image_link>
  1552.    <category term="BJT"/>
  1553.    <category term="Signals"/>
  1554.  </entry>
  1555.  <entry>
  1556.    <id>https://leap.tardate.com/playground/Lcd5110/DIYShield/</id>
  1557.    <link href="https://leap.tardate.com/playground/Lcd5110/DIYShield/"/>
  1558.    <updated>2018-02-09T11:34:52Z</updated>
  1559.    <title>#377 Nokia 5110 Shield</title>
  1560.    <summary>putting a Nokia 5110 on an Arduino Uno shield for no-fuss prototyping</summary>
  1561.    <g:image_link>https://leap.tardate.com/playground/Lcd5110/DIYShield/assets/DIYShield_build.jpg</g:image_link>
  1562.    <category term="LCD"/>
  1563.    <category term="Arduino"/>
  1564.  </entry>
  1565.  <entry>
  1566.    <id>https://leap.tardate.com/playground/PiezoVibrationDetector/</id>
  1567.    <link href="https://leap.tardate.com/playground/PiezoVibrationDetector/"/>
  1568.    <updated>2018-02-05T02:17:28Z</updated>
  1569.    <title>#376 PiezoVibrationDetector</title>
  1570.    <summary>counting beats per minute with a piezo tap sensor and an Arduino/ATmega328 analog comparator</summary>
  1571.    <g:image_link>https://leap.tardate.com/playground/PiezoVibrationDetector/assets/PiezoVibrationDetector_build.jpg</g:image_link>
  1572.    <category term="Arduino"/>
  1573.    <category term="Piezo"/>
  1574.  </entry>
  1575.  <entry>
  1576.    <id>https://leap.tardate.com/Radio/ThreeTransistorShortWaveReceiver/</id>
  1577.    <link href="https://leap.tardate.com/Radio/ThreeTransistorShortWaveReceiver/"/>
  1578.    <updated>2018-01-28T15:48:22Z</updated>
  1579.    <title>#375 ThreeTransistorShortWaveReceiver</title>
  1580.    <summary>building a simple 3-transistor regenerative receiver for HF shortwave</summary>
  1581.    <g:image_link>https://leap.tardate.com/Radio/ThreeTransistorShortWaveReceiver/assets/ThreeTransistorShortWaveReceiver_build.jpg</g:image_link>
  1582.    <category term="Radio"/>
  1583.    <category term="HF"/>
  1584.  </entry>
  1585.  <entry>
  1586.    <id>https://leap.tardate.com/Electronics101/VoltageReference/LT1019/</id>
  1587.    <link href="https://leap.tardate.com/Electronics101/VoltageReference/LT1019/"/>
  1588.    <updated>2018-01-26T03:08:43Z</updated>
  1589.    <title>#374 VoltageReference/LT1019</title>
  1590.    <summary>exploring the LT1019 precision reference, tested with an Arduino as an external voltage reference</summary>
  1591.    <g:image_link>https://leap.tardate.com/Electronics101/VoltageReference/LT1019/assets/LT1019_build.jpg</g:image_link>
  1592.    <category term="Voltage Reference"/>
  1593.  </entry>
  1594.  <entry>
  1595.    <id>https://leap.tardate.com/Audio/AudioEffectsChips/PX835/</id>
  1596.    <link href="https://leap.tardate.com/Audio/AudioEffectsChips/PX835/"/>
  1597.    <updated>2019-09-29T13:47:06Z</updated>
  1598.    <title>#373 PX835 Audio Effects Chip</title>
  1599.    <summary>figuring out how to use the PX835 &quot;16 Kind of Sound Doorbell Chip&quot; music chip</summary>
  1600.    <g:image_link>https://leap.tardate.com/Audio/AudioEffectsChips/PX835/assets/PX835_build.jpg</g:image_link>
  1601.    <category term="Audio"/>
  1602.    <category term="Music Chips"/>
  1603.  </entry>
  1604.  <entry>
  1605.    <id>https://leap.tardate.com/Equipment/MilliVoltmeterDIY/</id>
  1606.    <link href="https://leap.tardate.com/Equipment/MilliVoltmeterDIY/"/>
  1607.    <updated>2018-01-16T16:27:03Z</updated>
  1608.    <title>#372 MilliVoltmeterDIY</title>
  1609.    <summary>an ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference</summary>
  1610.    <g:image_link>https://leap.tardate.com/Equipment/MilliVoltmeterDIY/assets/MilliVoltmeterDIY_build.jpg</g:image_link>
  1611.    <category term="ATmega"/>
  1612.    <category term="ADC"/>
  1613.    <category term="Tools"/>
  1614.    <category term="Test Equipment"/>
  1615.  </entry>
  1616.  <entry>
  1617.    <id>https://leap.tardate.com/Electronics101/BJT/CommonEmitterAmplifier/</id>
  1618.    <link href="https://leap.tardate.com/Electronics101/BJT/CommonEmitterAmplifier/"/>
  1619.    <updated>2018-01-16T16:27:03Z</updated>
  1620.    <title>#371 CommonEmitterAmplifier</title>
  1621.    <summary>all about BJT common-emitter amplifier biasing and class of operation</summary>
  1622.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/CommonEmitterAmplifier/assets/CommonEmitterAmplifier_build.jpg</g:image_link>
  1623.    <category term="BJT"/>
  1624.  </entry>
  1625.  <entry>
  1626.    <id>https://leap.tardate.com/Electronics101/DigitaSwitch/TS3A5018/</id>
  1627.    <link href="https://leap.tardate.com/Electronics101/DigitaSwitch/TS3A5018/"/>
  1628.    <updated>2018-01-11T16:14:48Z</updated>
  1629.    <title>#370 DigitaSwitch/TS3A5018</title>
  1630.    <summary>testing the TS3A5018 Quad SPDT Analog Switch with a simple 555 timer and Arduino demo</summary>
  1631.    <g:image_link>https://leap.tardate.com/Electronics101/DigitaSwitch/TS3A5018/assets/TS3A5018_build.jpg</g:image_link>
  1632.    <category term="Arduino"/>
  1633.    <category term="Digital Switch"/>
  1634.    <category term="555 Timer"/>
  1635.  </entry>
  1636.  <entry>
  1637.    <id>https://leap.tardate.com/BoldportClub/ananas/</id>
  1638.    <link href="https://leap.tardate.com/BoldportClub/ananas/"/>
  1639.    <updated>2018-01-07T12:30:07Z</updated>
  1640.    <title>#369 BoldportClub/ananas</title>
  1641.    <summary>building the tropical end-of-year present from Boldport Club, Project #20 - ananas!</summary>
  1642.    <g:image_link>https://leap.tardate.com/BoldportClub/ananas/assets/ananas_build.jpg</g:image_link>
  1643.    <category term="Boldport"/>
  1644.    <category term="Oscillators"/>
  1645.  </entry>
  1646.  <entry>
  1647.    <id>https://leap.tardate.com/Audio/GranularSynth/</id>
  1648.    <link href="https://leap.tardate.com/Audio/GranularSynth/"/>
  1649.    <updated>2019-06-02T04:21:51Z</updated>
  1650.    <title>#368 GranularSynth</title>
  1651.    <summary>building an ATmega328 granular synth module in an Altoids can ..  because granular synthesis is a basically how they make Altoids, right?</summary>
  1652.    <g:image_link>https://leap.tardate.com/Audio/GranularSynth/assets/GranularSynth_build.jpg</g:image_link>
  1653.    <category term="Audio"/>
  1654.    <category term="Arduino"/>
  1655.  </entry>
  1656.  <entry>
  1657.    <id>https://leap.tardate.com/playground/nRF24/Scanner/</id>
  1658.    <link href="https://leap.tardate.com/playground/nRF24/Scanner/"/>
  1659.    <updated>2018-01-03T18:42:05Z</updated>
  1660.    <title>#367 nRF24/Scanner</title>
  1661.    <summary>a 2.4GHz channel scanner for the nRF24l01+ with Nokia 5110 LCD display</summary>
  1662.    <g:image_link>https://leap.tardate.com/playground/nRF24/Scanner/assets/Scanner_build.jpg</g:image_link>
  1663.    <category term="nRF24"/>
  1664.    <category term="Arduino"/>
  1665.  </entry>
  1666.  <entry>
  1667.    <id>https://leap.tardate.com/playground/Lcd5110/AdafruitSoftwareSPI/</id>
  1668.    <link href="https://leap.tardate.com/playground/Lcd5110/AdafruitSoftwareSPI/"/>
  1669.    <updated>2018-01-03T18:42:05Z</updated>
  1670.    <title>#366 Lcd5110/AdafruitSoftwareSPI</title>
  1671.    <summary>a quick Nokia 5110 LCD test using software SPI and the Adafruit PCD8544 library</summary>
  1672.    <g:image_link>https://leap.tardate.com/playground/Lcd5110/AdafruitSoftwareSPI/assets/AdafruitSoftwareSPI_build.jpg</g:image_link>
  1673.    <category term="LCD"/>
  1674.    <category term="Arduino"/>
  1675.  </entry>
  1676.  <entry>
  1677.    <id>https://leap.tardate.com/playground/Lcd5110/AdafruitHardwareSPI/</id>
  1678.    <link href="https://leap.tardate.com/playground/Lcd5110/AdafruitHardwareSPI/"/>
  1679.    <updated>2018-01-03T18:42:05Z</updated>
  1680.    <title>#365 Lcd5110/AdafruitHardwareSPI</title>
  1681.    <summary>a quick Nokia 5110 LCD test using hardware SPI and the Adafruit PCD8544 library</summary>
  1682.    <g:image_link>https://leap.tardate.com/playground/Lcd5110/AdafruitHardwareSPI/assets/AdafruitHardwareSPI_build.jpg</g:image_link>
  1683.    <category term="LCD"/>
  1684.    <category term="Arduino"/>
  1685.  </entry>
  1686.  <entry>
  1687.    <id>https://leap.tardate.com/playground/ClassicNokia/</id>
  1688.    <link href="https://leap.tardate.com/playground/ClassicNokia/"/>
  1689.    <updated>2018-01-03T18:42:05Z</updated>
  1690.    <title>#364 ClassicNokia</title>
  1691.    <summary>just a quick transcription of the classic Nokia 3310 ringtone for Arduino</summary>
  1692.    <g:image_link>https://leap.tardate.com/playground/ClassicNokia/assets/ClassicNokia_build.jpg</g:image_link>
  1693.    <category term="Audio"/>
  1694.    <category term="Arduino"/>
  1695.  </entry>
  1696.  <entry>
  1697.    <id>https://leap.tardate.com/BoldportClub/binco/</id>
  1698.    <link href="https://leap.tardate.com/BoldportClub/binco/"/>
  1699.    <updated>2017-12-29T13:50:08Z</updated>
  1700.    <title>#363 BoldportClub/binco</title>
  1701.    <summary>BINCO is a little up or down &quot;fidget&quot; counter, Project #19 of the Boldport Club</summary>
  1702.    <g:image_link>https://leap.tardate.com/BoldportClub/binco/assets/binco_build.jpg</g:image_link>
  1703.    <category term="Boldport"/>
  1704.    <category term="PCB Design"/>
  1705.    <category term="LED"/>
  1706.    <category term="CMOS/TTL"/>
  1707.  </entry>
  1708.  <entry>
  1709.    <id>https://leap.tardate.com/Audio/AudioEffectsChips/H83A/</id>
  1710.    <link href="https://leap.tardate.com/Audio/AudioEffectsChips/H83A/"/>
  1711.    <updated>2019-09-29T13:47:06Z</updated>
  1712.    <title>#362 H83A Audio Effects Chip</title>
  1713.    <summary>figuring out how to use the H-83A &quot;12 songs&quot; music chip</summary>
  1714.    <g:image_link>https://leap.tardate.com/Audio/AudioEffectsChips/H83A/assets/H83A_build.jpg</g:image_link>
  1715.    <category term="Audio"/>
  1716.    <category term="Music Chips"/>
  1717.  </entry>
  1718.  <entry>
  1719.    <id>https://leap.tardate.com/playground/TFT/Color128x128/</id>
  1720.    <link href="https://leap.tardate.com/playground/TFT/Color128x128/"/>
  1721.    <updated>2017-12-24T18:46:29Z</updated>
  1722.    <title>#361 TFT/Color128x128</title>
  1723.    <summary>testing a 128x128 colour TFT LCD with a couple of different Arduino libraries</summary>
  1724.    <g:image_link>https://leap.tardate.com/playground/TFT/Color128x128/assets/Color128x128_build.jpg</g:image_link>
  1725.    <category term="TFT LCD"/>
  1726.    <category term="Arduino"/>
  1727.  </entry>
  1728.  <entry>
  1729.    <id>https://leap.tardate.com/Electronics101/VoltageReference/TL431/ShuntRegulator/</id>
  1730.    <link href="https://leap.tardate.com/Electronics101/VoltageReference/TL431/ShuntRegulator/"/>
  1731.    <updated>2018-01-26T03:08:43Z</updated>
  1732.    <title>#360 TL431/ShuntRegulator</title>
  1733.    <summary>testing a TL431 voltage reference (regulator) circuit with manual course and fine trim</summary>
  1734.    <g:image_link>https://leap.tardate.com/Electronics101/VoltageReference/TL431/ShuntRegulator/assets/ShuntRegulator_build.jpg</g:image_link>
  1735.    <category term=" Power"/>
  1736.    <category term="Regulator"/>
  1737.    <category term="Reference"/>
  1738.  </entry>
  1739.  <entry>
  1740.    <id>https://leap.tardate.com/Audio/AudioEffectsChips/HS088/</id>
  1741.    <link href="https://leap.tardate.com/Audio/AudioEffectsChips/HS088/"/>
  1742.    <updated>2019-09-29T13:47:06Z</updated>
  1743.    <title>#359 HS088 Audio Effects Chip</title>
  1744.    <summary>figuring out the HS088 &quot;Ding Dong&quot; audio effects chip</summary>
  1745.    <g:image_link>https://leap.tardate.com/Audio/AudioEffectsChips/HS088/assets/HS088_build.jpg</g:image_link>
  1746.    <category term="Audio"/>
  1747.    <category term="Music Chips"/>
  1748.  </entry>
  1749.  <entry>
  1750.    <id>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/MC34063/ModuleKit/</id>
  1751.    <link href="https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/MC34063/ModuleKit/"/>
  1752.    <updated>2017-12-20T14:33:54Z</updated>
  1753.    <title>#358 MC34063/ModuleKit</title>
  1754.    <summary>build and test an MC34063-based boost converter</summary>
  1755.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/MC34063/ModuleKit/assets/ModuleKit_build.jpg</g:image_link>
  1756.    <category term="Power"/>
  1757.  </entry>
  1758.  <entry>
  1759.    <id>https://leap.tardate.com/BoldportClub/TheMonarch/</id>
  1760.    <link href="https://leap.tardate.com/BoldportClub/TheMonarch/"/>
  1761.    <updated>2017-12-18T15:36:30Z</updated>
  1762.    <title>#357 BoldportClub/TheMonarch</title>
  1763.    <summary>the third in a series of beautiful electronic &quot;bug&quot; boards from the Boldport Club, Project #18 October 2017</summary>
  1764.    <g:image_link>https://leap.tardate.com/BoldportClub/TheMonarch/assets/TheMonarch_build.jpg</g:image_link>
  1765.    <category term="Boldport"/>
  1766.    <category term="PCB Design"/>
  1767.    <category term="Bugs"/>
  1768.    <category term="LFSR"/>
  1769.  </entry>
  1770.  <entry>
  1771.    <id>https://leap.tardate.com/Audio/AudioEffectsChips/PX088A/</id>
  1772.    <link href="https://leap.tardate.com/Audio/AudioEffectsChips/PX088A/"/>
  1773.    <updated>2019-09-29T13:47:06Z</updated>
  1774.    <title>#356 PX088A Audio Effects Chip</title>
  1775.    <summary>figuring out how to use the PX088A &quot;Für Elise&quot; music chip</summary>
  1776.    <g:image_link>https://leap.tardate.com/Audio/AudioEffectsChips/PX088A/assets/PX088A_build.jpg</g:image_link>
  1777.    <category term="Audio"/>
  1778.    <category term="Music Chips"/>
  1779.  </entry>
  1780.  <entry>
  1781.    <id>https://leap.tardate.com/Kraft/snowflake/</id>
  1782.    <link href="https://leap.tardate.com/Kraft/snowflake/"/>
  1783.    <updated>2017-12-14T11:57:58Z</updated>
  1784.    <title>#355 Snow Flake</title>
  1785.    <summary>an Atmel SAM D ARM Cortex-M0-controlled LED ornament produced by @LuckResistor and shared with the Boldport Club community as a special project</summary>
  1786.    <g:image_link>https://leap.tardate.com/Kraft/snowflake/assets/snowflake_build.jpg</g:image_link>
  1787.    <category term="Craft"/>
  1788.    <category term="ARM"/>
  1789.    <category term="LED"/>
  1790.  </entry>
  1791.  <entry>
  1792.    <id>https://leap.tardate.com/Kinetics/SpiderBot/</id>
  1793.    <link href="https://leap.tardate.com/Kinetics/SpiderBot/"/>
  1794.    <updated>2017-11-15T12:38:17Z</updated>
  1795.    <title>#354 SpiderBot</title>
  1796.    <summary>Boldport Club PissOff mutant offspring .. with spider legs and scuttling drive system</summary>
  1797.    <g:image_link>https://leap.tardate.com/Kinetics/SpiderBot/assets/SpiderBot_build.jpg</g:image_link>
  1798.    <category term="Boldport"/>
  1799.    <category term="Kinetics"/>
  1800.  </entry>
  1801.  <entry>
  1802.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/DFlipFlop/</id>
  1803.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/DFlipFlop/"/>
  1804.    <updated>2017-10-30T13:40:33Z</updated>
  1805.    <title>#353 DFlipFlop</title>
  1806.    <summary>building a clocked D Flip-flop with 74LS00 NAND gates</summary>
  1807.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/DFlipFlop/assets/DFlipFlop_build.jpg</g:image_link>
  1808.    <category term="Logic Gates"/>
  1809.    <category term="CMOS/TTL"/>
  1810.  </entry>
  1811.  <entry>
  1812.    <id>https://leap.tardate.com/Radio/SDR/DecodingACARS/</id>
  1813.    <link href="https://leap.tardate.com/Radio/SDR/DecodingACARS/"/>
  1814.    <updated>2019-09-29T13:47:06Z</updated>
  1815.    <title>#352 Decoding ACARS</title>
  1816.    <summary>decoding ACARS with rtl_acars_ng and a R820T2+RTL2832U dongle on MacOSX</summary>
  1817.    <g:image_link>https://leap.tardate.com/Radio/SDR/DecodingACARS/assets/DecodingACARS_build.jpg</g:image_link>
  1818.    <category term="SDR"/>
  1819.    <category term="Radio"/>
  1820.  </entry>
  1821.  <entry>
  1822.    <id>https://leap.tardate.com/Radio/SDR/RtlSdrDongle/</id>
  1823.    <link href="https://leap.tardate.com/Radio/SDR/RtlSdrDongle/"/>
  1824.    <updated>2019-09-29T13:47:06Z</updated>
  1825.    <title>#351 RTL-SDR Dongle</title>
  1826.    <summary>getting started with an R820T2+RTL2832U dongle and open-source SDR software on MacOSX (gprx, CubicSDR)</summary>
  1827.    <g:image_link>https://leap.tardate.com/Radio/SDR/RtlSdrDongle/assets/RtlSdrDongle_build.jpg</g:image_link>
  1828.    <category term="SDR"/>
  1829.    <category term="Radio"/>
  1830.  </entry>
  1831.  <entry>
  1832.    <id>https://leap.tardate.com/Kraft/CircuitScribe/LiteWings/</id>
  1833.    <link href="https://leap.tardate.com/Kraft/CircuitScribe/LiteWings/"/>
  1834.    <updated>2017-10-26T16:44:35Z</updated>
  1835.    <title>#350 LiteWings</title>
  1836.    <summary>learning about conductive ink with the CircuitScribe LiteWings kit</summary>
  1837.    <g:image_link>https://leap.tardate.com/Kraft/CircuitScribe/LiteWings/assets/LiteWings_build.jpg</g:image_link>
  1838.    <category term="Conductive Ink"/>
  1839.    <category term="Craft"/>
  1840.  </entry>
  1841.  <entry>
  1842.    <id>https://leap.tardate.com/BoldportClub/stringy/DemoBurner/</id>
  1843.    <link href="https://leap.tardate.com/BoldportClub/stringy/DemoBurner/"/>
  1844.    <updated>2017-10-17T12:35:14Z</updated>
  1845.    <title>#349 stringy/DemoBurner</title>
  1846.    <summary>burning a new demo mode for the Boldport Club Stringy, with a Ruby gem for MusicXML conversion to PIC assembler</summary>
  1847.    <g:image_link>https://leap.tardate.com/BoldportClub/stringy/DemoBurner/assets/DemoBurner_build.jpg</g:image_link>
  1848.    <category term="Boldport"/>
  1849.    <category term="PIC"/>
  1850.  </entry>
  1851.  <entry>
  1852.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/DLatch/</id>
  1853.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/DLatch/"/>
  1854.    <updated>2017-10-10T15:54:26Z</updated>
  1855.    <title>#348 DLatch</title>
  1856.    <summary>building a D Latch with 74LS00 NAND gates</summary>
  1857.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/DLatch/assets/DLatch_build.jpg</g:image_link>
  1858.    <category term="Logic Gates"/>
  1859.    <category term="CMOS/TTL"/>
  1860.  </entry>
  1861.  <entry>
  1862.    <id>https://leap.tardate.com/Electronics101/Connectors/RF/</id>
  1863.    <link href="https://leap.tardate.com/Electronics101/Connectors/RF/"/>
  1864.    <updated>2017-10-10T15:54:25Z</updated>
  1865.    <title>#347 RF Connectors</title>
  1866.    <summary>notes on miscellaneous RF connectors</summary>
  1867.    <g:image_link>https://leap.tardate.com/Electronics101/Connectors/RF/assets/RF_build.jpg</g:image_link>
  1868.    <category term="Radio"/>
  1869.    <category term="Connectors"/>
  1870.  </entry>
  1871.  <entry>
  1872.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchWithNandGates/</id>
  1873.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchWithNandGates/"/>
  1874.    <updated>2017-10-06T01:44:22Z</updated>
  1875.    <title>#346 SRLatchWithNandGates</title>
  1876.    <summary>Set-Reset latch implemented with NAND gates</summary>
  1877.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchWithNandGates/assets/SRLatchWithNandGates_build.jpg</g:image_link>
  1878.    <category term="Logic Gates"/>
  1879.    <category term="CMOS/TTL"/>
  1880.  </entry>
  1881.  <entry>
  1882.    <id>https://leap.tardate.com/BoldportClub/mostap/</id>
  1883.    <link href="https://leap.tardate.com/BoldportClub/mostap/"/>
  1884.    <updated>2017-10-03T14:23:40Z</updated>
  1885.    <title>#345 BoldportClub/mostap</title>
  1886.    <summary>upgrading the tap to modern CMOS and MOSFET technology, circa 1975 - another Boldport Club retro classic. The mostap is a touch sensor using NAND-gate flip-flops and FET output drivers.</summary>
  1887.    <g:image_link>https://leap.tardate.com/BoldportClub/mostap/assets/mostap_build.jpg</g:image_link>
  1888.    <category term="Boldport"/>
  1889.    <category term="CMOS"/>
  1890.  </entry>
  1891.  <entry>
  1892.    <id>https://leap.tardate.com/ESP8266/micropython/GettingStarted/</id>
  1893.    <link href="https://leap.tardate.com/ESP8266/micropython/GettingStarted/"/>
  1894.    <updated>2017-09-26T17:01:34Z</updated>
  1895.    <title>#344 ESP8266/micropython/GettingStarted</title>
  1896.    <summary>getting MicroPython up and running with an ESP-01 ESP8266</summary>
  1897.    <g:image_link>https://leap.tardate.com/ESP8266/micropython/GettingStarted/assets/GettingStarted_build.jpg</g:image_link>
  1898.    <category term="ESP8266"/>
  1899.    <category term="MicroPython"/>
  1900.  </entry>
  1901.  <entry>
  1902.    <id>https://leap.tardate.com/ESP8266/Sensors/DHT11/</id>
  1903.    <link href="https://leap.tardate.com/ESP8266/Sensors/DHT11/"/>
  1904.    <updated>2017-09-25T15:38:43Z</updated>
  1905.    <title>#343 ESP8266/Sensors/DHT11</title>
  1906.    <summary>reading temperature and humidity with a DHT11 sensor and ESP-01, coding with ESP8266 core for Arduino</summary>
  1907.    <g:image_link>https://leap.tardate.com/ESP8266/Sensors/DHT11/assets/DHT11_build.jpg</g:image_link>
  1908.    <category term="ESP8266"/>
  1909.    <category term="Sensors"/>
  1910.  </entry>
  1911.  <entry>
  1912.    <id>https://leap.tardate.com/ESP8266/MorseBlinky/</id>
  1913.    <link href="https://leap.tardate.com/ESP8266/MorseBlinky/"/>
  1914.    <updated>2017-09-24T13:47:05Z</updated>
  1915.    <title>#342 ESP8266/MorseBlinky</title>
  1916.    <summary>building code for an ESP-01 with the ESP8266 core for Arduino and demonstrate with a simple morse code blinker</summary>
  1917.    <g:image_link>https://leap.tardate.com/ESP8266/MorseBlinky/assets/MorseBlinky_build.jpg</g:image_link>
  1918.    <category term="ESP8266"/>
  1919.  </entry>
  1920.  <entry>
  1921.    <id>https://leap.tardate.com/Electronics101/Power/UsbPowerSupplyKit/</id>
  1922.    <link href="https://leap.tardate.com/Electronics101/Power/UsbPowerSupplyKit/"/>
  1923.    <updated>2017-09-18T14:43:37Z</updated>
  1924.    <title>#341 UsbPowerSupplyKit</title>
  1925.    <summary>building a USB Wall Wart and taking a look at how they work .. instead of taking them apart or having them blow up</summary>
  1926.    <g:image_link>https://leap.tardate.com/Electronics101/Power/UsbPowerSupplyKit/assets/UsbPowerSupplyKit_build.jpg</g:image_link>
  1927.    <category term="Power"/>
  1928.    <category term="USB"/>
  1929.  </entry>
  1930.  <entry>
  1931.    <id>https://leap.tardate.com/BoldportClub/IxpandO/</id>
  1932.    <link href="https://leap.tardate.com/BoldportClub/IxpandO/"/>
  1933.    <updated>2017-09-10T15:59:16Z</updated>
  1934.    <title>#340 BoldportClub/IxpandO</title>
  1935.    <summary>an input/output expansion board based on Microchip's MCP23017, BoldportClub Project #16. Demo program covers digital output and interrupt-driven input</summary>
  1936.    <g:image_link>https://leap.tardate.com/BoldportClub/IxpandO/assets/IxpandO_build.jpg</g:image_link>
  1937.    <category term="Boldport"/>
  1938.    <category term="PCB Design"/>
  1939.    <category term="Port Expander"/>
  1940.  </entry>
  1941.  <entry>
  1942.    <id>https://leap.tardate.com/Electronics101/GuitarEffects/DelayKit/</id>
  1943.    <link href="https://leap.tardate.com/Electronics101/GuitarEffects/DelayKit/"/>
  1944.    <updated>2017-08-27T15:38:39Z</updated>
  1945.    <title>#339 DelayKit</title>
  1946.    <summary>build and test a PT2399-based analogue delay pedal kit</summary>
  1947.    <g:image_link>https://leap.tardate.com/Electronics101/GuitarEffects/DelayKit/assets/DelayKit_build.jpg</g:image_link>
  1948.    <category term="Guitar Effects"/>
  1949.    <category term="Audio"/>
  1950.  </entry>
  1951.  <entry>
  1952.    <id>https://leap.tardate.com/Kraft/GlowBall/</id>
  1953.    <link href="https://leap.tardate.com/Kraft/GlowBall/"/>
  1954.    <updated>2017-08-24T18:00:18Z</updated>
  1955.    <title>#338 GlowBall</title>
  1956.    <summary>building LED effects for a Glass Eye Studio Celestial Planet Weight</summary>
  1957.    <g:image_link>https://leap.tardate.com/Kraft/GlowBall/assets/GlowBall_build.jpg</g:image_link>
  1958.    <category term="LED"/>
  1959.    <category term="Oscillators"/>
  1960.    <category term="Power"/>
  1961.    <category term="Craft"/>
  1962.  </entry>
  1963.  <entry>
  1964.    <id>https://leap.tardate.com/Electronics101/RgbLedGlow/</id>
  1965.    <link href="https://leap.tardate.com/Electronics101/RgbLedGlow/"/>
  1966.    <updated>2017-08-19T17:33:24Z</updated>
  1967.    <title>#337 RgbLedGlow</title>
  1968.    <summary>rainbow glow effects with an RGB LED and OpAmp oscillators</summary>
  1969.    <g:image_link>https://leap.tardate.com/Electronics101/RgbLedGlow/assets/RgbLedGlow_build.jpg</g:image_link>
  1970.    <category term="LED"/>
  1971.    <category term="Oscillators"/>
  1972.  </entry>
  1973.  <entry>
  1974.    <id>https://leap.tardate.com/Electronics101/Oscillators/ComparatorRelaxation/</id>
  1975.    <link href="https://leap.tardate.com/Electronics101/Oscillators/ComparatorRelaxation/"/>
  1976.    <updated>2017-08-19T13:50:42Z</updated>
  1977.    <title>#336 Oscillators/ComparatorRelaxation</title>
  1978.    <summary>test a classic comparator-based relaxation oscillator, modified for single-supply LM358 OpAmp</summary>
  1979.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/ComparatorRelaxation/assets/ComparatorRelaxation_build.jpg</g:image_link>
  1980.    <category term="OpAmp"/>
  1981.    <category term="Oscillators"/>
  1982.  </entry>
  1983.  <entry>
  1984.    <id>https://leap.tardate.com/Electronics101/MCP2200/Chaser/</id>
  1985.    <link href="https://leap.tardate.com/Electronics101/MCP2200/Chaser/"/>
  1986.    <updated>2017-08-19T13:50:42Z</updated>
  1987.    <title>#335 MCP2200/Chaser</title>
  1988.    <summary>using the MCP2200 GPIO from MacOSX. With great power comes great responsibility to blink LEDs</summary>
  1989.    <g:image_link>https://leap.tardate.com/Electronics101/MCP2200/Chaser/assets/Chaser_build.jpg</g:image_link>
  1990.    <category term="UART"/>
  1991.    <category term="USB"/>
  1992.    <category term="LED"/>
  1993.  </entry>
  1994.  <entry>
  1995.    <id>https://leap.tardate.com/Electronics101/MCP2200/DevKit/</id>
  1996.    <link href="https://leap.tardate.com/Electronics101/MCP2200/DevKit/"/>
  1997.    <updated>2017-08-15T17:19:04Z</updated>
  1998.    <title>#334 MCP2200/DevKit</title>
  1999.    <summary>exploring the capabilities of the MCP2200 USB-to-UART and program it from a MacOSX host</summary>
  2000.    <g:image_link>https://leap.tardate.com/Electronics101/MCP2200/DevKit/assets/DevKit_build.jpg</g:image_link>
  2001.    <category term="UART"/>
  2002.    <category term="USB"/>
  2003.  </entry>
  2004.  <entry>
  2005.    <id>https://leap.tardate.com/playground/VoltageSelfMeasurement/</id>
  2006.    <link href="https://leap.tardate.com/playground/VoltageSelfMeasurement/"/>
  2007.    <updated>2017-08-15T17:19:04Z</updated>
  2008.    <title>#333 VoltageSelfMeasurement</title>
  2009.    <summary>self-measurement of an Arduino's supply voltage (Vcc)</summary>
  2010.    <g:image_link>https://leap.tardate.com/playground/VoltageSelfMeasurement/assets/VoltageSelfMeasurement_build.jpg</g:image_link>
  2011.    <category term="Arduino"/>
  2012.    <category term="ADC"/>
  2013.  </entry>
  2014.  <entry>
  2015.    <id>https://leap.tardate.com/Electronics101/Oscillators/RCPhaseShiftBJT/</id>
  2016.    <link href="https://leap.tardate.com/Electronics101/Oscillators/RCPhaseShiftBJT/"/>
  2017.    <updated>2017-08-13T11:01:24Z</updated>
  2018.    <title>#332 RCPhaseShiftBJT</title>
  2019.    <summary>testing an RC phase-shift oscillator using a BJT amplifier</summary>
  2020.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/RCPhaseShiftBJT/assets/RCPhaseShiftBJT_build.jpg</g:image_link>
  2021.    <category term="BJT"/>
  2022.    <category term="RC"/>
  2023.    <category term="Oscillators"/>
  2024.  </entry>
  2025.  <entry>
  2026.    <id>https://leap.tardate.com/PIC/GettingBlinky/</id>
  2027.    <link href="https://leap.tardate.com/PIC/GettingBlinky/"/>
  2028.    <updated>2017-08-13T11:01:24Z</updated>
  2029.    <title>#331 PIC/GettingBlinky</title>
  2030.    <summary>getting up and running building a PIC assembler project on MacOSX with a PIC12F675 development board. Let's get Blinky!</summary>
  2031.    <g:image_link>https://leap.tardate.com/PIC/GettingBlinky/assets/GettingBlinky_build.jpg</g:image_link>
  2032.    <category term="PIC"/>
  2033.    <category term="LED"/>
  2034.  </entry>
  2035.  <entry>
  2036.    <id>https://leap.tardate.com/Electronics101/Power/Any2AnyPowerPack/</id>
  2037.    <link href="https://leap.tardate.com/Electronics101/Power/Any2AnyPowerPack/"/>
  2038.    <updated>2017-08-06T11:06:07Z</updated>
  2039.    <title>#330 Power/Any2AnyPowerPack</title>
  2040.    <summary>a 2.1mm DC adapter pack with battery bypass and any-polarity to any-polarity connectors</summary>
  2041.    <g:image_link>https://leap.tardate.com/Electronics101/Power/Any2AnyPowerPack/assets/Any2AnyPowerPack_build.jpg</g:image_link>
  2042.    <category term="Power"/>
  2043.  </entry>
  2044.  <entry>
  2045.    <id>https://leap.tardate.com/Electronics101/Connectors/Power/</id>
  2046.    <link href="https://leap.tardate.com/Electronics101/Connectors/Power/"/>
  2047.    <updated>2017-10-10T15:54:25Z</updated>
  2048.    <title>#329 PowerConnectors</title>
  2049.    <summary>obsessing over all manner of DC power connectors</summary>
  2050.    <g:image_link>https://leap.tardate.com/Electronics101/Connectors/Power/assets/Power_build.jpg</g:image_link>
  2051.    <category term="Power"/>
  2052.  </entry>
  2053.  <entry>
  2054.    <id>https://leap.tardate.com/Electronics101/555Timer/VoltageControlledOscillator/</id>
  2055.    <link href="https://leap.tardate.com/Electronics101/555Timer/VoltageControlledOscillator/"/>
  2056.    <updated>2017-08-03T17:51:17Z</updated>
  2057.    <title>#328 VoltageControlledOscillator/555</title>
  2058.    <summary>a voltage-controlled oscillator (VCO) using the 555 timer</summary>
  2059.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/VoltageControlledOscillator/assets/VoltageControlledOscillator_build.jpg</g:image_link>
  2060.    <category term="Oscillators"/>
  2061.    <category term="VCO"/>
  2062.    <category term="555 Timer"/>
  2063.  </entry>
  2064.  <entry>
  2065.    <id>https://leap.tardate.com/Electronics101/Mixers/RFDiodeRing/</id>
  2066.    <link href="https://leap.tardate.com/Electronics101/Mixers/RFDiodeRing/"/>
  2067.    <updated>2017-07-30T14:59:45Z</updated>
  2068.    <title>#327 Mixers/RFDiodeRing</title>
  2069.    <summary>a diode ring double-balanced frequency mixer</summary>
  2070.    <g:image_link>https://leap.tardate.com/Electronics101/Mixers/RFDiodeRing/assets/RFDiodeRing_build.jpg</g:image_link>
  2071.    <category term="Radio"/>
  2072.    <category term="Mixers"/>
  2073.  </entry>
  2074.  <entry>
  2075.    <id>https://leap.tardate.com/Electronics101/Mixers/</id>
  2076.    <link href="https://leap.tardate.com/Electronics101/Mixers/"/>
  2077.    <updated>2017-07-30T14:59:45Z</updated>
  2078.    <title>#326 Mixers</title>
  2079.    <summary>all about frequency mixers</summary>
  2080.    <g:image_link>https://leap.tardate.com/Electronics101/Mixers/assets/Mixers_build.jpg</g:image_link>
  2081.    <category term="Radio"/>
  2082.    <category term="Mixers"/>
  2083.  </entry>
  2084.  <entry>
  2085.    <id>https://leap.tardate.com/BoldportClub/spoolt/</id>
  2086.    <link href="https://leap.tardate.com/BoldportClub/spoolt/"/>
  2087.    <updated>2017-07-27T17:50:06Z</updated>
  2088.    <title>#325 BoldportClub/spoolt</title>
  2089.    <summary>pimp my spoolt - the Boldport Club solder dispenser (Project #15, July 2017)</summary>
  2090.    <g:image_link>https://leap.tardate.com/BoldportClub/spoolt/assets/spoolt_build.jpg</g:image_link>
  2091.    <category term="Boldport"/>
  2092.    <category term="Soldering"/>
  2093.  </entry>
  2094.  <entry>
  2095.    <id>https://leap.tardate.com/Equipment/Labrador/</id>
  2096.    <link href="https://leap.tardate.com/Equipment/Labrador/"/>
  2097.    <updated>2017-07-27T17:50:06Z</updated>
  2098.    <title>#324 Labrador</title>
  2099.    <summary>first look at the EspoTek Labrador USB &quot;lab-on-a-board&quot; hardware and software</summary>
  2100.    <g:image_link>https://leap.tardate.com/Equipment/Labrador/assets/Labrador_build.jpg</g:image_link>
  2101.    <category term="Tools"/>
  2102.    <category term="Test Equipment"/>
  2103.  </entry>
  2104.  <entry>
  2105.    <id>https://leap.tardate.com/BoldportClub/stringy/</id>
  2106.    <link href="https://leap.tardate.com/BoldportClub/stringy/"/>
  2107.    <updated>2017-06-26T15:07:01Z</updated>
  2108.    <title>#323 BoldportClub/stringy</title>
  2109.    <summary>building and playing (mainly playing) the Boldport Club Stringy (Project #14)</summary>
  2110.    <g:image_link>https://leap.tardate.com/BoldportClub/stringy/assets/stringy_build.jpg</g:image_link>
  2111.    <category term="Boldport"/>
  2112.    <category term="PIC"/>
  2113.    <category term="Audio"/>
  2114.  </entry>
  2115.  <entry>
  2116.    <id>https://leap.tardate.com/BoldportClub/cordwood-too/FidgetCube/</id>
  2117.    <link href="https://leap.tardate.com/BoldportClub/cordwood-too/FidgetCube/"/>
  2118.    <updated>2017-06-25T08:07:40Z</updated>
  2119.    <title>#322 BoldportClub/cordwood-too/FidgetCube</title>
  2120.    <summary>making a Fidget Cube controller for the Boldport Cordwood Too</summary>
  2121.    <g:image_link>https://leap.tardate.com/BoldportClub/cordwood-too/FidgetCube/assets/FidgetCube_build.jpg</g:image_link>
  2122.    <category term="Boldport"/>
  2123.    <category term="Sensors"/>
  2124.    <category term="LED"/>
  2125.  </entry>
  2126.  <entry>
  2127.    <id>https://leap.tardate.com/BoldportClub/cordwood-too/</id>
  2128.    <link href="https://leap.tardate.com/BoldportClub/cordwood-too/"/>
  2129.    <updated>2017-06-15T12:00:17Z</updated>
  2130.    <title>#321 BoldportClub/cordwood-too</title>
  2131.    <summary>the Cordwood Puzzle returns! Boldport Club Project #13, May 2017</summary>
  2132.    <g:image_link>https://leap.tardate.com/BoldportClub/cordwood-too/assets/cordwood-too_build.jpg</g:image_link>
  2133.    <category term="Boldport"/>
  2134.    <category term="PCB Design"/>
  2135.    <category term="LED"/>
  2136.  </entry>
  2137.  <entry>
  2138.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/SyncJKCounter/</id>
  2139.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/SyncJKCounter/"/>
  2140.    <updated>2017-07-27T17:50:06Z</updated>
  2141.    <title>#320 Synchronous JK Counter</title>
  2142.    <summary>a synchronous 8-bit counter built with JK Flip-Flops</summary>
  2143.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/SyncJKCounter/assets/SyncJKCounter_build.jpg</g:image_link>
  2144.    <category term="CMOS/TTL"/>
  2145.    <category term="Digital Logic"/>
  2146.  </entry>
  2147.  <entry>
  2148.    <id>https://leap.tardate.com/Electronics101/555Timer/DigitalLogicClock/</id>
  2149.    <link href="https://leap.tardate.com/Electronics101/555Timer/DigitalLogicClock/"/>
  2150.    <updated>2017-05-23T17:19:00Z</updated>
  2151.    <title>#319 DigitalLogicClock</title>
  2152.    <summary>build a flexible, low-frequency digital logic clock module</summary>
  2153.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/DigitalLogicClock/assets/DigitalLogicClock_build.jpg</g:image_link>
  2154.    <category term="555 Timer"/>
  2155.    <category term="CMOS/TTL"/>
  2156.  </entry>
  2157.  <entry>
  2158.    <id>https://leap.tardate.com/Electronics101/555Timer/Bistable/</id>
  2159.    <link href="https://leap.tardate.com/Electronics101/555Timer/Bistable/"/>
  2160.    <updated>2017-05-21T15:27:44Z</updated>
  2161.    <title>#318 Bistable</title>
  2162.    <summary>using the 555 timer as a bistable latch and button debouncer</summary>
  2163.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/Bistable/assets/Bistable_build.jpg</g:image_link>
  2164.    <category term="555 Timer"/>
  2165.  </entry>
  2166.  <entry>
  2167.    <id>https://leap.tardate.com/Electronics101/SchmittTrigger/BasicDiscrete/</id>
  2168.    <link href="https://leap.tardate.com/Electronics101/SchmittTrigger/BasicDiscrete/"/>
  2169.    <updated>2017-05-21T15:27:44Z</updated>
  2170.    <title>#317 SchmittTrigger/BasicDiscrete</title>
  2171.    <summary>test the classic emitter-coupled Schmitt Trigger circuit design</summary>
  2172.    <g:image_link>https://leap.tardate.com/Electronics101/SchmittTrigger/BasicDiscrete/assets/BasicDiscrete_build.jpg</g:image_link>
  2173.    <category term="Schmitt"/>
  2174.    <category term="BJT"/>
  2175.  </entry>
  2176.  <entry>
  2177.    <id>https://leap.tardate.com/BoldportClub/QSOPBreakout/</id>
  2178.    <link href="https://leap.tardate.com/BoldportClub/QSOPBreakout/"/>
  2179.    <updated>2017-05-19T13:00:00Z</updated>
  2180.    <title>#316 BoldportClub/QSOPBreakout</title>
  2181.    <summary>all about soldering and the Boldport Club QSOP breakout board</summary>
  2182.    <g:image_link>https://leap.tardate.com/BoldportClub/QSOPBreakout/assets/QSOPBreakout_build.jpg</g:image_link>
  2183.    <category term="Boldport"/>
  2184.    <category term="Soldering"/>
  2185.  </entry>
  2186.  <entry>
  2187.    <id>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/MT3608/VariableBoost/</id>
  2188.    <link href="https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/MT3608/VariableBoost/"/>
  2189.    <updated>2017-10-08T12:09:10Z</updated>
  2190.    <title>#315 MT3608/VariableBoost</title>
  2191.    <summary>testing the canonical variable boost circuit using the MT3608 High Efficiency 1.2MHz 2A Step Up Converter</summary>
  2192.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/MT3608/VariableBoost/assets/VariableBoost_build.jpg</g:image_link>
  2193.    <category term="Power"/>
  2194.  </entry>
  2195.  <entry>
  2196.    <id>https://leap.tardate.com/playground/EEPROM/AT28C16/PEProgrammer/</id>
  2197.    <link href="https://leap.tardate.com/playground/EEPROM/AT28C16/PEProgrammer/"/>
  2198.    <updated>2017-05-11T12:01:51Z</updated>
  2199.    <title>#314 EEPROM/AT28C16/PEProgrammer</title>
  2200.    <summary>programming an AT28C16 64k EEPROM with an Arduino and MCP23S17 16-bit port expander</summary>
  2201.    <g:image_link>https://leap.tardate.com/playground/EEPROM/AT28C16/PEProgrammer/assets/PEProgrammer_build.jpg</g:image_link>
  2202.    <category term="EEPROM"/>
  2203.    <category term="Arduino"/>
  2204.  </entry>
  2205.  <entry>
  2206.    <id>https://leap.tardate.com/Electronics101/MCP23S17/</id>
  2207.    <link href="https://leap.tardate.com/Electronics101/MCP23S17/"/>
  2208.    <updated>2017-05-07T12:13:27Z</updated>
  2209.    <title>#313 MCP23S17</title>
  2210.    <summary>investigate and test the MCP23S17 16-Bit I/O Expander with serial interface</summary>
  2211.    <g:image_link>https://leap.tardate.com/Electronics101/MCP23S17/assets/MCP23S17_build.jpg</g:image_link>
  2212.    <category term="Arduino"/>
  2213.    <category term="Port Expander"/>
  2214.  </entry>
  2215.  <entry>
  2216.    <id>https://leap.tardate.com/BoldportClub/TheMatrix/Firecracker/</id>
  2217.    <link href="https://leap.tardate.com/BoldportClub/TheMatrix/Firecracker/"/>
  2218.    <updated>2017-06-05T11:23:09Z</updated>
  2219.    <title>#312 TheMatrix/Firecracker</title>
  2220.    <summary>a firecracker simulacrum running on the BoldportClub Matrix</summary>
  2221.    <g:image_link>https://leap.tardate.com/BoldportClub/TheMatrix/Firecracker/assets/Firecracker_build.jpg</g:image_link>
  2222.    <category term="Boldport"/>
  2223.    <category term="LED"/>
  2224.    <category term="AS1130"/>
  2225.    <category term="Sensors"/>
  2226.  </entry>
  2227.  <entry>
  2228.    <id>https://leap.tardate.com/BoldportClub/Juice/</id>
  2229.    <link href="https://leap.tardate.com/BoldportClub/Juice/"/>
  2230.    <updated>2017-04-30T06:29:37Z</updated>
  2231.    <title>#311 BoldportClub/Juice</title>
  2232.    <summary>building the Boldport Juice battery replacement kit (Project #12)</summary>
  2233.    <g:image_link>https://leap.tardate.com/BoldportClub/Juice/assets/Juice_build.jpg</g:image_link>
  2234.    <category term="Boldport"/>
  2235.    <category term="PCB Design"/>
  2236.    <category term="Power"/>
  2237.  </entry>
  2238.  <entry>
  2239.    <id>https://leap.tardate.com/Radio/FM/TEA5767/</id>
  2240.    <link href="https://leap.tardate.com/Radio/FM/TEA5767/"/>
  2241.    <updated>2019-08-06T17:20:09Z</updated>
  2242.    <title>#310 TEA5767 FM Receiver</title>
  2243.    <summary>controlling the TEA5767 low-power FM stereo radio chip with an Arduino</summary>
  2244.    <g:image_link>https://leap.tardate.com/Radio/FM/TEA5767/assets/TEA5767_build.jpg</g:image_link>
  2245.    <category term="Radio"/>
  2246.    <category term="FM"/>
  2247.    <category term="Arduino"/>
  2248.  </entry>
  2249.  <entry>
  2250.    <id>https://leap.tardate.com/Electronics101/Connectors/Audio/</id>
  2251.    <link href="https://leap.tardate.com/Electronics101/Connectors/Audio/"/>
  2252.    <updated>2017-10-10T15:54:25Z</updated>
  2253.    <title>#309 AudioConnectors</title>
  2254.    <summary>notes on miscellaneous audio connectors</summary>
  2255.    <g:image_link>https://leap.tardate.com/Electronics101/Connectors/Audio/assets/Audio_build.jpg</g:image_link>
  2256.    <category term="Audio"/>
  2257.    <category term="Connectors"/>
  2258.  </entry>
  2259.  <entry>
  2260.    <id>https://leap.tardate.com/playground/LED7Segment/CombinationalLogicDriver/</id>
  2261.    <link href="https://leap.tardate.com/playground/LED7Segment/CombinationalLogicDriver/"/>
  2262.    <updated>2017-04-23T18:59:24Z</updated>
  2263.    <title>#308 LED7Segment/CombinationalLogicDriver</title>
  2264.    <summary>- dust off some combinational logic methods and build a 8421-BCD to 7-segment LED driver with 7400 series logic</summary>
  2265.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/CombinationalLogicDriver/assets/CombinationalLogicDriver_build.jpg</g:image_link>
  2266.    <category term="7-Segment"/>
  2267.    <category term="CMOS/TTL"/>
  2268.    <category term="Arduino"/>
  2269.  </entry>
  2270.  <entry>
  2271.    <id>https://leap.tardate.com/BoldportClub/TheMatrix/KeypadControl/</id>
  2272.    <link href="https://leap.tardate.com/BoldportClub/TheMatrix/KeypadControl/"/>
  2273.    <updated>2017-04-21T13:28:00Z</updated>
  2274.    <title>#307 TheMatrix/KeypadControl</title>
  2275.    <summary>use a 20-button keypad to write a scrolling message on the Boldport Matrix</summary>
  2276.    <g:image_link>https://leap.tardate.com/BoldportClub/TheMatrix/KeypadControl/assets/KeypadControl_build.jpg</g:image_link>
  2277.    <category term="Boldport"/>
  2278.    <category term="LED"/>
  2279.    <category term="AS1130"/>
  2280.  </entry>
  2281.  <entry>
  2282.    <id>https://leap.tardate.com/playground/KeyboardMatrixModule/SwitchInterrupts/</id>
  2283.    <link href="https://leap.tardate.com/playground/KeyboardMatrixModule/SwitchInterrupts/"/>
  2284.    <updated>2017-04-17T17:08:25Z</updated>
  2285.    <title>#306 KeyboardMatrixModule/SwitchInterrupts</title>
  2286.    <summary>demo interrupt-driven switch input on a simple pushbutton/LED matrix module and how to use the EnableInterrupt library</summary>
  2287.    <g:image_link>https://leap.tardate.com/playground/KeyboardMatrixModule/SwitchInterrupts/assets/SwitchInterrupts_build.jpg</g:image_link>
  2288.    <category term="Arduino"/>
  2289.    <category term="Human Input"/>
  2290.  </entry>
  2291.  <entry>
  2292.    <id>https://leap.tardate.com/playground/KeyboardMatrixModule/LedControl/</id>
  2293.    <link href="https://leap.tardate.com/playground/KeyboardMatrixModule/LedControl/"/>
  2294.    <updated>2017-04-17T17:08:25Z</updated>
  2295.    <title>#305 KeyboardMatrixModule/LedControl</title>
  2296.    <summary>demo controlling the LEDs on a simple pushbutton/LED matrix module</summary>
  2297.    <g:image_link>https://leap.tardate.com/playground/KeyboardMatrixModule/LedControl/assets/LedControl_build.jpg</g:image_link>
  2298.    <category term="Arduino"/>
  2299.    <category term="LED"/>
  2300.  </entry>
  2301.  <entry>
  2302.    <id>https://leap.tardate.com/playground/KeyboardMatrixModule/KeyMatrixInput/</id>
  2303.    <link href="https://leap.tardate.com/playground/KeyboardMatrixModule/KeyMatrixInput/"/>
  2304.    <updated>2017-04-17T17:08:25Z</updated>
  2305.    <title>#304 KeyboardMatrixModule/KeyMatrixInput</title>
  2306.    <summary>demo multiplexed key input on a simple pushbutton/LED matrix module and how to use INPUT_PULLUP</summary>
  2307.    <g:image_link>https://leap.tardate.com/playground/KeyboardMatrixModule/KeyMatrixInput/assets/KeyMatrixInput_build.jpg</g:image_link>
  2308.    <category term="Arduino"/>
  2309.    <category term="Human Input"/>
  2310.  </entry>
  2311.  <entry>
  2312.    <id>https://leap.tardate.com/playground/KeyboardMatrixModule/</id>
  2313.    <link href="https://leap.tardate.com/playground/KeyboardMatrixModule/"/>
  2314.    <updated>2017-04-17T17:08:25Z</updated>
  2315.    <title>#303 KeyboardMatrixModule</title>
  2316.    <summary>demo a simple pushbutton/LED matrix module</summary>
  2317.    <g:image_link>https://leap.tardate.com/playground/KeyboardMatrixModule/assets/KeyboardMatrixModule_build.jpg</g:image_link>
  2318.    <category term="Arduino"/>
  2319.    <category term="LED"/>
  2320.    <category term="Human Input"/>
  2321.  </entry>
  2322.  <entry>
  2323.    <id>https://leap.tardate.com/BoldportClub/TheMatrix/GameOfLife/</id>
  2324.    <link href="https://leap.tardate.com/BoldportClub/TheMatrix/GameOfLife/"/>
  2325.    <updated>2017-04-16T15:01:55Z</updated>
  2326.    <title>#302 TheMatrix/GameOfLife</title>
  2327.    <summary>a simple implementation of Conway's Game of Life on the BoldportClub Matrix</summary>
  2328.    <g:image_link>https://leap.tardate.com/BoldportClub/TheMatrix/GameOfLife/assets/GameOfLife_build.jpg</g:image_link>
  2329.    <category term="Boldport"/>
  2330.    <category term="LED"/>
  2331.    <category term="AS1130"/>
  2332.  </entry>
  2333.  <entry>
  2334.    <id>https://leap.tardate.com/playground/DHT11/Basics/</id>
  2335.    <link href="https://leap.tardate.com/playground/DHT11/Basics/"/>
  2336.    <updated>2017-04-11T16:45:55Z</updated>
  2337.    <title>#301 DHT11/Basics</title>
  2338.    <summary>test basic temperature and humidity readings with the DHT11 sensor</summary>
  2339.    <g:image_link>https://leap.tardate.com/playground/DHT11/Basics/assets/Basics_build.jpg</g:image_link>
  2340.    <category term="Sensors"/>
  2341.    <category term="Arduino"/>
  2342.  </entry>
  2343.  <entry>
  2344.    <id>https://leap.tardate.com/BoldportClub/TheMatrix/LedTest/</id>
  2345.    <link href="https://leap.tardate.com/BoldportClub/TheMatrix/LedTest/"/>
  2346.    <updated>2017-04-09T14:54:40Z</updated>
  2347.    <title>#300 TheMatrix/LedTest</title>
  2348.    <summary>testing The Matrix (Boldport Club project #11) with @luckyresistor's LRAS1130 library</summary>
  2349.    <g:image_link>https://leap.tardate.com/BoldportClub/TheMatrix/LedTest/assets/LedTest_build.jpg</g:image_link>
  2350.    <category term="Boldport"/>
  2351.    <category term="LED"/>
  2352.    <category term="AS1130"/>
  2353.  </entry>
  2354.  <entry>
  2355.    <id>https://leap.tardate.com/BoldportClub/TheMatrix/</id>
  2356.    <link href="https://leap.tardate.com/BoldportClub/TheMatrix/"/>
  2357.    <updated>2017-04-09T14:54:40Z</updated>
  2358.    <title>#299 BoldportClub/TheMatrix</title>
  2359.    <summary>building The Matrix (Boldport Club project #11) is an I²C-controlled 24x5 LED matrix display, powered by an AMS AS1130 LED driver</summary>
  2360.    <g:image_link>https://leap.tardate.com/BoldportClub/TheMatrix/assets/TheMatrix_build.jpg</g:image_link>
  2361.    <category term="Boldport"/>
  2362.    <category term="PCB Design"/>
  2363.    <category term="LED"/>
  2364.    <category term="AS1130"/>
  2365.  </entry>
  2366.  <entry>
  2367.    <id>https://leap.tardate.com/Kraft/GoldenHind/</id>
  2368.    <link href="https://leap.tardate.com/Kraft/GoldenHind/"/>
  2369.    <updated>2017-05-17T15:04:09Z</updated>
  2370.    <title>#298 GoldenHind</title>
  2371.    <summary>building a mini metal model of the Golden Hind</summary>
  2372.    <g:image_link>https://leap.tardate.com/Kraft/GoldenHind/assets/GoldenHind_build.jpg</g:image_link>
  2373.    <category term="Craft"/>
  2374.  </entry>
  2375.  <entry>
  2376.    <id>https://leap.tardate.com/Electronics101/CD4070/Oscillator/</id>
  2377.    <link href="https://leap.tardate.com/Electronics101/CD4070/Oscillator/"/>
  2378.    <updated>2017-04-08T15:05:03Z</updated>
  2379.    <title>#297 CD4070/Oscillator</title>
  2380.    <summary>examine a classic CD4070 oscillator design and variations</summary>
  2381.    <g:image_link>https://leap.tardate.com/Electronics101/CD4070/Oscillator/assets/Oscillator_build.jpg</g:image_link>
  2382.    <category term="CMOS"/>
  2383.    <category term="Oscillators"/>
  2384.  </entry>
  2385.  <entry>
  2386.    <id>https://leap.tardate.com/BoldportClub/QSOPBreakout/SolarPendulum/</id>
  2387.    <link href="https://leap.tardate.com/BoldportClub/QSOPBreakout/SolarPendulum/"/>
  2388.    <updated>2017-03-19T11:11:31Z</updated>
  2389.    <title>#296 SolarPendulum</title>
  2390.    <summary>build a solar-powered pendulum similar to the popular &quot;solar wobble/flip-flop toys&quot; on the Boldport QSOP breakout board</summary>
  2391.    <g:image_link>https://leap.tardate.com/BoldportClub/QSOPBreakout/SolarPendulum/assets/SolarPendulum_build.jpg</g:image_link>
  2392.    <category term="Boldport"/>
  2393.    <category term="Solar"/>
  2394.  </entry>
  2395.  <entry>
  2396.    <id>https://leap.tardate.com/Equipment/FrequencyCounterKit/</id>
  2397.    <link href="https://leap.tardate.com/Equipment/FrequencyCounterKit/"/>
  2398.    <updated>2017-03-11T06:30:47Z</updated>
  2399.    <title>#295 FrequencyCounterKit</title>
  2400.    <summary>build and test a common PIC-based frequency counter kit</summary>
  2401.    <g:image_link>https://leap.tardate.com/Equipment/FrequencyCounterKit/assets/FrequencyCounterKit_build.jpg</g:image_link>
  2402.    <category term="PIC"/>
  2403.    <category term="Tools"/>
  2404.    <category term="Test Equipment"/>
  2405.    <category term="Oscillators"/>
  2406.  </entry>
  2407.  <entry>
  2408.    <id>https://leap.tardate.com/Electronics101/CD4060/CrystalOscillator/</id>
  2409.    <link href="https://leap.tardate.com/Electronics101/CD4060/CrystalOscillator/"/>
  2410.    <updated>2017-03-07T23:48:34Z</updated>
  2411.    <title>#294 CD4060/CrystalOscillator</title>
  2412.    <summary>exploring the behaviour of the CD4060 ripple counter driven by a crystal oscillator</summary>
  2413.    <g:image_link>https://leap.tardate.com/Electronics101/CD4060/CrystalOscillator/assets/CrystalOscillator_build.jpg</g:image_link>
  2414.    <category term="CMOS/TTL"/>
  2415.    <category term="Oscillators"/>
  2416.  </entry>
  2417.  <entry>
  2418.    <id>https://leap.tardate.com/Electronics101/CD4060/RCOscillator/</id>
  2419.    <link href="https://leap.tardate.com/Electronics101/CD4060/RCOscillator/"/>
  2420.    <updated>2017-03-07T11:41:47Z</updated>
  2421.    <title>#293 CD4060/RCOscillator</title>
  2422.    <summary>exploring the behaviour of the CD4060 ripple counter driven by an RC oscillator</summary>
  2423.    <g:image_link>https://leap.tardate.com/Electronics101/CD4060/RCOscillator/assets/RCOscillator_build.jpg</g:image_link>
  2424.    <category term="CMOS"/>
  2425.    <category term="Oscillators"/>
  2426.  </entry>
  2427.  <entry>
  2428.    <id>https://leap.tardate.com/Audio/AudioEffectsChips/H823/</id>
  2429.    <link href="https://leap.tardate.com/Audio/AudioEffectsChips/H823/"/>
  2430.    <updated>2019-09-29T13:47:06Z</updated>
  2431.    <title>#292 H823 Audio Effects Chip</title>
  2432.    <summary>figuring out how to use the H823 &quot;Happy Birthday&quot; music chip</summary>
  2433.    <g:image_link>https://leap.tardate.com/Audio/AudioEffectsChips/H823/assets/H823_build.jpg</g:image_link>
  2434.    <category term="Audio"/>
  2435.    <category term="Music Chips"/>
  2436.  </entry>
  2437.  <entry>
  2438.    <id>https://leap.tardate.com/Electronics101/CD4060/MusicLightKit/</id>
  2439.    <link href="https://leap.tardate.com/Electronics101/CD4060/MusicLightKit/"/>
  2440.    <updated>2017-02-17T17:16:02Z</updated>
  2441.    <title>#291 CD4060/MusicLightKit</title>
  2442.    <summary>learning how to use the CD4060 14-Stage Ripple Carry Binary Counter by building a music/LED-effects kit</summary>
  2443.    <g:image_link>https://leap.tardate.com/Electronics101/CD4060/MusicLightKit/assets/MusicLightKit_build.jpg</g:image_link>
  2444.    <category term="CMOS"/>
  2445.  </entry>
  2446.  <entry>
  2447.    <id>https://leap.tardate.com/BoldportClub/PissOff/</id>
  2448.    <link href="https://leap.tardate.com/BoldportClub/PissOff/"/>
  2449.    <updated>2017-02-14T21:22:32Z</updated>
  2450.    <title>#290 BoldportClub/PissOff</title>
  2451.    <summary>an angry barking blue-in-the-face mad proximity sensor - Boldport Club Project #9, November 2016</summary>
  2452.    <g:image_link>https://leap.tardate.com/BoldportClub/PissOff/assets/PissOff_build.jpg</g:image_link>
  2453.    <category term="Boldport"/>
  2454.    <category term="PCB Design"/>
  2455.    <category term="NXP"/>
  2456.  </entry>
  2457.  <entry>
  2458.    <id>https://leap.tardate.com/Electronics101/VoltmeterAmmeterModule/</id>
  2459.    <link href="https://leap.tardate.com/Electronics101/VoltmeterAmmeterModule/"/>
  2460.    <updated>2017-01-30T05:46:17Z</updated>
  2461.    <title>#289 Voltmeter/Ammeter Module</title>
  2462.    <summary>test and calibrate a DC Voltmeter/Ammeter panel module</summary>
  2463.    <g:image_link>https://leap.tardate.com/Electronics101/VoltmeterAmmeterModule/assets/VoltmeterAmmeterModule_build.jpg</g:image_link>
  2464.    <category term="Sensors"/>
  2465.  </entry>
  2466.  <entry>
  2467.    <id>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/BasicInvertingBuckBoostAvrControl/</id>
  2468.    <link href="https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/BasicInvertingBuckBoostAvrControl/"/>
  2469.    <updated>2017-05-06T10:20:26Z</updated>
  2470.    <title>#288 BasicInvertingBuckBoostAvrControl</title>
  2471.    <summary>build and test an inverting buck-boost converter controlled by an ATtiny85</summary>
  2472.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/BasicInvertingBuckBoostAvrControl/assets/BasicInvertingBuckBoostAvrControl_build.jpg</g:image_link>
  2473.    <category term="Power"/>
  2474.    <category term="ATtiny"/>
  2475.    <category term="Arduino"/>
  2476.  </entry>
  2477.  <entry>
  2478.    <id>https://leap.tardate.com/Electronics101/UltrasonicAlarm/</id>
  2479.    <link href="https://leap.tardate.com/Electronics101/UltrasonicAlarm/"/>
  2480.    <updated>2017-01-24T18:54:46Z</updated>
  2481.    <title>#287 UltrasonicAlarm</title>
  2482.    <summary>build an ultrasonic motion alarm with the HC-SR04 module and discrete logic</summary>
  2483.    <g:image_link>https://leap.tardate.com/Electronics101/UltrasonicAlarm/assets/UltrasonicAlarm_build.jpg</g:image_link>
  2484.    <category term="555 Timer"/>
  2485.    <category term="Sensors"/>
  2486.    <category term="CMOS/TTL"/>
  2487.    <category term="HC-SR04"/>
  2488.  </entry>
  2489.  <entry>
  2490.    <id>https://leap.tardate.com/Electronics101/SwitchPowerNFET/</id>
  2491.    <link href="https://leap.tardate.com/Electronics101/SwitchPowerNFET/"/>
  2492.    <updated>2017-01-17T15:29:05Z</updated>
  2493.    <title>#286 SwitchPowerNFET</title>
  2494.    <summary>low-side n-channel MOSFET switching of large loads with a microcontroller</summary>
  2495.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchPowerNFET/assets/SwitchPowerNFET_build.jpg</g:image_link>
  2496.    <category term="MOSFET"/>
  2497.    <category term="Arduino"/>
  2498.  </entry>
  2499.  <entry>
  2500.    <id>https://leap.tardate.com/BoldportClub/tap/</id>
  2501.    <link href="https://leap.tardate.com/BoldportClub/tap/"/>
  2502.    <updated>2017-01-15T12:28:23Z</updated>
  2503.    <title>#285 BoldportClub/tap</title>
  2504.    <summary>Harking back to an old Boldport project, which harks back to a 1974 Elektor article .. and the main IC (7400 NAND gate) is still available!</summary>
  2505.    <g:image_link>https://leap.tardate.com/BoldportClub/tap/assets/tap_build.jpg</g:image_link>
  2506.    <category term="Boldport"/>
  2507.    <category term="PCB Design"/>
  2508.    <category term="CMOS/TTL"/>
  2509.  </entry>
  2510.  <entry>
  2511.    <id>https://leap.tardate.com/BoldportClub/TheGent/</id>
  2512.    <link href="https://leap.tardate.com/BoldportClub/TheGent/"/>
  2513.    <updated>2017-01-08T16:02:46Z</updated>
  2514.    <title>#284 BoldportClub/TheGent</title>
  2515.    <summary>The Gent is Boldport Club Project #10 - a simple circuit on a beautiful board</summary>
  2516.    <g:image_link>https://leap.tardate.com/BoldportClub/TheGent/assets/TheGent_build.jpg</g:image_link>
  2517.    <category term="Boldport"/>
  2518.    <category term="PCB Design"/>
  2519.    <category term="Bugs"/>
  2520.  </entry>
  2521.  <entry>
  2522.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/XorWithNandGates/</id>
  2523.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/XorWithNandGates/"/>
  2524.    <updated>2017-01-05T17:58:22Z</updated>
  2525.    <title>#283 XorWithNandGates</title>
  2526.    <summary>construct an XOR gate with only an 74LS132 quad NAND gate, and demonstrate its behaviour with an Arduino and Processing</summary>
  2527.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/XorWithNandGates/assets/XorWithNandGates_build.jpg</g:image_link>
  2528.    <category term="Logic Gates"/>
  2529.    <category term="CMOS/TTL"/>
  2530.  </entry>
  2531.  <entry>
  2532.    <id>https://leap.tardate.com/Equipment/FunctionGeneratorKit/</id>
  2533.    <link href="https://leap.tardate.com/Equipment/FunctionGeneratorKit/"/>
  2534.    <updated>2017-01-01T07:41:43Z</updated>
  2535.    <title>#282 FunctionGeneratorKit</title>
  2536.    <summary>build and test a function generator kit based on the XR-2206 monolithic function generator</summary>
  2537.    <g:image_link>https://leap.tardate.com/Equipment/FunctionGeneratorKit/assets/FunctionGeneratorKit_build.jpg</g:image_link>
  2538.    <category term="Oscillators"/>
  2539.    <category term="Tools"/>
  2540.    <category term="Test Equipment"/>
  2541.    <category term="XR2206"/>
  2542.  </entry>
  2543.  <entry>
  2544.    <id>https://leap.tardate.com/Radio/FM/ThreeStageTransmitter/</id>
  2545.    <link href="https://leap.tardate.com/Radio/FM/ThreeStageTransmitter/"/>
  2546.    <updated>2019-08-06T17:20:09Z</updated>
  2547.    <title>#281 ThreeStageTransmitter</title>
  2548.    <summary>an ugly-style-in-a-can build of dazaro3's 3-stage FM transmitter circuit</summary>
  2549.    <g:image_link>https://leap.tardate.com/Radio/FM/ThreeStageTransmitter/assets/ThreeStageTransmitter_build.jpg</g:image_link>
  2550.    <category term="Radio"/>
  2551.    <category term="FM"/>
  2552.  </entry>
  2553.  <entry>
  2554.    <id>https://leap.tardate.com/Radio/FM/BreadboardTransmitter/</id>
  2555.    <link href="https://leap.tardate.com/Radio/FM/BreadboardTransmitter/"/>
  2556.    <updated>2019-08-06T17:20:09Z</updated>
  2557.    <title>#280 BreadboardTransmitter</title>
  2558.    <summary>build a simple 3-stage FM transmitter on a breadboard from a design by dazaro3</summary>
  2559.    <g:image_link>https://leap.tardate.com/Radio/FM/BreadboardTransmitter/assets/BreadboardTransmitter_build.jpg</g:image_link>
  2560.    <category term="Radio"/>
  2561.    <category term="FM"/>
  2562.  </entry>
  2563.  <entry>
  2564.    <id>https://leap.tardate.com/Radio/FM/SingleStageTransmitterKit2/</id>
  2565.    <link href="https://leap.tardate.com/Radio/FM/SingleStageTransmitterKit2/"/>
  2566.    <updated>2019-08-06T17:20:09Z</updated>
  2567.    <title>#279 Single-stage FM Transmitter Kit 2</title>
  2568.    <summary>build and tweak/tune another simple single-stage FM Transmitter Kit</summary>
  2569.    <g:image_link>https://leap.tardate.com/Radio/FM/SingleStageTransmitterKit2/assets/SingleStageTransmitterKit2_build.jpg</g:image_link>
  2570.    <category term="Radio"/>
  2571.    <category term="FM"/>
  2572.    <category term="Transmitter"/>
  2573.  </entry>
  2574.  <entry>
  2575.    <id>https://leap.tardate.com/Equipment/ComponentTesterKit/</id>
  2576.    <link href="https://leap.tardate.com/Equipment/ComponentTesterKit/"/>
  2577.    <updated>2016-12-07T17:02:19Z</updated>
  2578.    <title>#278 ComponentTesterKit</title>
  2579.    <summary>build and evaluate a popular ATMEAG328-based component tester kit</summary>
  2580.    <g:image_link>https://leap.tardate.com/Equipment/ComponentTesterKit/assets/ComponentTesterKit_build.jpg</g:image_link>
  2581.    <category term="Tools"/>
  2582.    <category term="Test Equipment"/>
  2583.    <category term="ATmega"/>
  2584.  </entry>
  2585.  <entry>
  2586.    <id>https://leap.tardate.com/BoldportClub/Touchy/</id>
  2587.    <link href="https://leap.tardate.com/BoldportClub/Touchy/"/>
  2588.    <updated>2016-12-04T05:56:42Z</updated>
  2589.    <title>#277 BoldportClub/Touchy</title>
  2590.    <summary>Touchy is a capacitive touch input device with on-board Sleepy Bee microcontroller (Boldport Club Project #7)</summary>
  2591.    <g:image_link>https://leap.tardate.com/BoldportClub/Touchy/assets/Touchy_build.jpg</g:image_link>
  2592.    <category term="Boldport"/>
  2593.    <category term="EFM8"/>
  2594.    <category term="Sensors"/>
  2595.  </entry>
  2596.  <entry>
  2597.    <id>https://leap.tardate.com/playground/VariableFrequencyRunwayLEDs/</id>
  2598.    <link href="https://leap.tardate.com/playground/VariableFrequencyRunwayLEDs/"/>
  2599.    <updated>2016-11-30T17:32:49Z</updated>
  2600.    <title>#276 VariableFrequencyRunwayLEDs</title>
  2601.    <summary>a PWM-controlled variable frequency LED &quot;runway lights&quot; effect using the LM331 and CD4017</summary>
  2602.    <g:image_link>https://leap.tardate.com/playground/VariableFrequencyRunwayLEDs/assets/VariableFrequencyRunwayLEDs_build.jpg</g:image_link>
  2603.    <category term="LED"/>
  2604.    <category term="Arduino"/>
  2605.  </entry>
  2606.  <entry>
  2607.    <id>https://leap.tardate.com/playground/ATtiny/At8MHz/</id>
  2608.    <link href="https://leap.tardate.com/playground/ATtiny/At8MHz/"/>
  2609.    <updated>2018-10-21T07:22:34Z</updated>
  2610.    <title>#275 ATtiny/At8MHz</title>
  2611.    <summary>how to run an ATtiny85 microprocessor at 8MHz using the internal clock</summary>
  2612.    <g:image_link>https://leap.tardate.com/playground/ATtiny/At8MHz/assets/At8MHz_build.jpg</g:image_link>
  2613.    <category term="Arduino"/>
  2614.    <category term="ATmel"/>
  2615.  </entry>
  2616.  <entry>
  2617.    <id>https://leap.tardate.com/Equipment/FY3200S/</id>
  2618.    <link href="https://leap.tardate.com/Equipment/FY3200S/"/>
  2619.    <updated>2016-11-26T05:37:23Z</updated>
  2620.    <title>#274 FY3200S</title>
  2621.    <summary>testing out the Feeltech FY3200S digital function generator</summary>
  2622.    <g:image_link>https://leap.tardate.com/Equipment/FY3200S/assets/FY3200S_build.jpg</g:image_link>
  2623.    <category term="Tools"/>
  2624.    <category term="Test Equipment"/>
  2625.  </entry>
  2626.  <entry>
  2627.    <id>https://leap.tardate.com/Electronics101/VoltageControlledOscillator/</id>
  2628.    <link href="https://leap.tardate.com/Electronics101/VoltageControlledOscillator/"/>
  2629.    <updated>2016-11-25T16:03:58Z</updated>
  2630.    <title>#273 VoltageControlledOscillator</title>
  2631.    <summary>exploring varicap diodes (KV1471) and their use in frequency tuning of a Colpitts-style voltage-controlled oscillator</summary>
  2632.    <g:image_link>https://leap.tardate.com/Electronics101/VoltageControlledOscillator/assets/VoltageControlledOscillator_build.jpg</g:image_link>
  2633.    <category term="Oscillators"/>
  2634.    <category term="VCO"/>
  2635.    <category term="Varicap"/>
  2636.  </entry>
  2637.  <entry>
  2638.    <id>https://leap.tardate.com/Equipment/Saike909D/</id>
  2639.    <link href="https://leap.tardate.com/Equipment/Saike909D/"/>
  2640.    <updated>2016-11-22T16:22:46Z</updated>
  2641.    <title>#272 Saike909D</title>
  2642.    <summary>unboxing and initial review of the Saike 909D 3-in-1 hot air rework station</summary>
  2643.    <g:image_link>https://leap.tardate.com/Equipment/Saike909D/assets/Saike909D_build.jpg</g:image_link>
  2644.    <category term="Tools"/>
  2645.  </entry>
  2646.  <entry>
  2647.    <id>https://leap.tardate.com/BoldportClub/cordwood/tuner/</id>
  2648.    <link href="https://leap.tardate.com/BoldportClub/cordwood/tuner/"/>
  2649.    <updated>2016-11-20T03:36:40Z</updated>
  2650.    <title>#271 BoldportClub/cordwood/tuner</title>
  2651.    <summary>use the Boldport Cuttle &amp; Cordwood as a guitar tuner, with a custom input preamp</summary>
  2652.    <g:image_link>https://leap.tardate.com/BoldportClub/cordwood/tuner/assets/tuner_build.jpg</g:image_link>
  2653.    <category term="Boldport"/>
  2654.    <category term="Cordwood"/>
  2655.    <category term="Arduino"/>
  2656.    <category term="Audio"/>
  2657.  </entry>
  2658.  <entry>
  2659.    <id>https://leap.tardate.com/BoldportClub/cordwood/aanimate/</id>
  2660.    <link href="https://leap.tardate.com/BoldportClub/cordwood/aanimate/"/>
  2661.    <updated>2016-11-13T10:52:19Z</updated>
  2662.    <title>#270 BoldportClub/cordwood/aanimate</title>
  2663.    <summary>run a demo animation using aaronjasso's Cordwood library</summary>
  2664.    <g:image_link>https://leap.tardate.com/BoldportClub/cordwood/aanimate/assets/aanimate_build.jpg</g:image_link>
  2665.    <category term="Boldport"/>
  2666.    <category term="Cordwood"/>
  2667.    <category term="Arduino"/>
  2668.  </entry>
  2669.  <entry>
  2670.    <id>https://leap.tardate.com/BoldportClub/cordwood/</id>
  2671.    <link href="https://leap.tardate.com/BoldportClub/cordwood/"/>
  2672.    <updated>2016-11-13T08:49:19Z</updated>
  2673.    <title>#269 BoldportClub/cordwood</title>
  2674.    <summary>the Cordwood Puzzle evokes an era of stuffing massive components into small spaces without a clear idea of where this is all heading! Introducing the Boldport Club Project #3</summary>
  2675.    <g:image_link>https://leap.tardate.com/BoldportClub/cordwood/assets/cordwood_build.jpg</g:image_link>
  2676.    <category term="Boldport"/>
  2677.    <category term="PCB Design"/>
  2678.    <category term="LED"/>
  2679.  </entry>
  2680.  <entry>
  2681.    <id>https://leap.tardate.com/playground/ChainBlocks/</id>
  2682.    <link href="https://leap.tardate.com/playground/ChainBlocks/"/>
  2683.    <updated>2016-11-13T08:49:19Z</updated>
  2684.    <title>#268 ChainBlocks</title>
  2685.    <summary>testing some &quot;Chain Blocks&quot; and demonstrate an XY Plotter block (with an MCP42010 digital potentiometer) by drawing the PrexLab logo on an Oscilloscope</summary>
  2686.    <g:image_link>https://leap.tardate.com/playground/ChainBlocks/assets/ChainBlocks_build.jpg</g:image_link>
  2687.    <category term="Arduino"/>
  2688.  </entry>
  2689.  <entry>
  2690.    <id>https://leap.tardate.com/BoldportClub/TheCuttle/ScopeTag/</id>
  2691.    <link href="https://leap.tardate.com/BoldportClub/TheCuttle/ScopeTag/"/>
  2692.    <updated>2016-11-13T08:49:19Z</updated>
  2693.    <title>#267 Cuttle Scope Tag</title>
  2694.    <summary>Get the Boldport Cuttle to write its name on a Digital Oscilloscope with an MCP42010 digital potentiometer</summary>
  2695.    <g:image_link>https://leap.tardate.com/BoldportClub/TheCuttle/ScopeTag/assets/ScopeTag_build.jpg</g:image_link>
  2696.    <category term="Boldport"/>
  2697.    <category term="ATmega"/>
  2698.    <category term="ATmel"/>
  2699.    <category term="Arduino"/>
  2700.    <category term="Digital Pot"/>
  2701.    <category term="MCP42010"/>
  2702.    <category term="Oscilloscope"/>
  2703.  </entry>
  2704.  <entry>
  2705.    <id>https://leap.tardate.com/BoldportClub/TheCuttle/</id>
  2706.    <link href="https://leap.tardate.com/BoldportClub/TheCuttle/"/>
  2707.    <updated>2016-11-06T06:20:22Z</updated>
  2708.    <title>#266 BoldportClub/TheCuttle</title>
  2709.    <summary>the most beautiful Arduino-compatible board you will ever see. Another soldering kit from The Boldport Club (Project #6)</summary>
  2710.    <g:image_link>https://leap.tardate.com/BoldportClub/TheCuttle/assets/TheCuttle_build.jpg</g:image_link>
  2711.    <category term="Boldport"/>
  2712.    <category term="PCB Design"/>
  2713.    <category term="ATmega"/>
  2714.    <category term="ATmel"/>
  2715.    <category term="Arduino"/>
  2716.  </entry>
  2717.  <entry>
  2718.    <id>https://leap.tardate.com/playground/XYplotter/</id>
  2719.    <link href="https://leap.tardate.com/playground/XYplotter/"/>
  2720.    <updated>2016-11-06T06:20:22Z</updated>
  2721.    <title>#265 XYplotter</title>
  2722.    <summary>draw pictures on a Digital Oscilloscope using an MCP42010 dual digital potentiometer and an Arduino. Of course, the first thing to try is the classic Christmas Tree</summary>
  2723.    <g:image_link>https://leap.tardate.com/playground/XYplotter/assets/XYplotter_build.jpg</g:image_link>
  2724.    <category term="Arduino"/>
  2725.    <category term="Digital Pot"/>
  2726.    <category term="MCP42010"/>
  2727.    <category term="Oscilloscope"/>
  2728.  </entry>
  2729.  <entry>
  2730.    <id>https://leap.tardate.com/Electronics101/DigitalPots/MCP42010/</id>
  2731.    <link href="https://leap.tardate.com/Electronics101/DigitalPots/MCP42010/"/>
  2732.    <updated>2016-11-05T11:32:02Z</updated>
  2733.    <title>#264 DigitalPots/MCP42010</title>
  2734.    <summary>control the MCP42010 dual 10kΩ digital potentiometer with an Arduino and hardware SPI</summary>
  2735.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalPots/MCP42010/assets/MCP42010_build.jpg</g:image_link>
  2736.    <category term="Arduino"/>
  2737.    <category term="Digital Pot"/>
  2738.    <category term="MCP42010"/>
  2739.  </entry>
  2740.  <entry>
  2741.    <id>https://leap.tardate.com/BoldportClub/ligemdio/</id>
  2742.    <link href="https://leap.tardate.com/BoldportClub/ligemdio/"/>
  2743.    <updated>2016-11-13T08:49:19Z</updated>
  2744.    <title>#263 BoldportClub/ligemdio</title>
  2745.    <summary>an LED tester kit featureing a classic BJT constant current source. From The Boldport Club (Project #8)</summary>
  2746.    <g:image_link>https://leap.tardate.com/BoldportClub/ligemdio/assets/ligemdio_build.jpg</g:image_link>
  2747.    <category term="Boldport"/>
  2748.    <category term="PCB Design"/>
  2749.    <category term="LED"/>
  2750.    <category term="BJT"/>
  2751.  </entry>
  2752.  <entry>
  2753.    <id>https://leap.tardate.com/Electronics101/GuitarEffects/BazzFuss/</id>
  2754.    <link href="https://leap.tardate.com/Electronics101/GuitarEffects/BazzFuss/"/>
  2755.    <updated>2016-10-24T16:44:07Z</updated>
  2756.    <title>#262 BazzFuss</title>
  2757.    <summary>the Bazz Fuss &quot;chocolate noisette&quot; - a super-minimalist overdrive/distortion/fuzz effect circuit</summary>
  2758.    <g:image_link>https://leap.tardate.com/Electronics101/GuitarEffects/BazzFuss/assets/BazzFuss_build.jpg</g:image_link>
  2759.    <category term="Guitar Effects"/>
  2760.    <category term="Audio"/>
  2761.  </entry>
  2762.  <entry>
  2763.    <id>https://leap.tardate.com/Electronics101/DigitalPots/MCP4017/</id>
  2764.    <link href="https://leap.tardate.com/Electronics101/DigitalPots/MCP4017/"/>
  2765.    <updated>2016-10-23T14:35:20Z</updated>
  2766.    <title>#261 DigitalPots/MCP4017</title>
  2767.    <summary>control the MCP4017 single 7-Bit I²C digital potentiometer with an Arduino</summary>
  2768.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalPots/MCP4017/assets/MCP4017_build.jpg</g:image_link>
  2769.    <category term="Arduino"/>
  2770.    <category term="Digital Pot"/>
  2771.    <category term="MCP4017"/>
  2772.  </entry>
  2773.  <entry>
  2774.    <id>https://leap.tardate.com/Equipment/SaleaeLogic/</id>
  2775.    <link href="https://leap.tardate.com/Equipment/SaleaeLogic/"/>
  2776.    <updated>2016-10-22T15:12:00Z</updated>
  2777.    <title>#260 SaleaeLogic</title>
  2778.    <summary>checking out a second-hand Saleae Logic (24 MS/s, 8 channel USB logic analyzer - that works on a Mac!!)</summary>
  2779.    <g:image_link>https://leap.tardate.com/Equipment/SaleaeLogic/assets/SaleaeLogic_build.jpg</g:image_link>
  2780.    <category term="Tools"/>
  2781.    <category term="Test Equipment"/>
  2782.    <category term="Logic Analyzer"/>
  2783.  </entry>
  2784.  <entry>
  2785.    <id>https://leap.tardate.com/Electronics101/DigitalPots/M62429/</id>
  2786.    <link href="https://leap.tardate.com/Electronics101/DigitalPots/M62429/"/>
  2787.    <updated>2016-10-22T15:12:00Z</updated>
  2788.    <title>#259 DigitalPots/M62429</title>
  2789.    <summary>control the M62429 dual channel volume control with an Arduino</summary>
  2790.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalPots/M62429/assets/M62429_build.jpg</g:image_link>
  2791.    <category term="Arduino"/>
  2792.    <category term="Digital Pot"/>
  2793.    <category term="M62429"/>
  2794.  </entry>
  2795.  <entry>
  2796.    <id>https://leap.tardate.com/Electronics101/ClapSwitchKit2/</id>
  2797.    <link href="https://leap.tardate.com/Electronics101/ClapSwitchKit2/"/>
  2798.    <updated>2016-10-20T14:57:43Z</updated>
  2799.    <title>#258 ClapSwitchKit2</title>
  2800.    <summary>practice some Boldport-style soldering on yet-another clap switch kit</summary>
  2801.    <g:image_link>https://leap.tardate.com/Electronics101/ClapSwitchKit2/assets/ClapSwitchKit2_build.jpg</g:image_link>
  2802.    <category term="Oscillators"/>
  2803.    <category term="BJT"/>
  2804.    <category term="Logic Gates"/>
  2805.  </entry>
  2806.  <entry>
  2807.    <id>https://leap.tardate.com/BoldportClub/Emergency/</id>
  2808.    <link href="https://leap.tardate.com/BoldportClub/Emergency/"/>
  2809.    <updated>2016-10-19T13:37:59Z</updated>
  2810.    <title>#257 BoldportClub/Emergency</title>
  2811.    <summary>pimp the Boldport Club Emergency kit (Project #2) .. now a LED blinky with 3 passives and a transistor (Esaki Effect)</summary>
  2812.    <g:image_link>https://leap.tardate.com/BoldportClub/Emergency/assets/Emergency_build.jpg</g:image_link>
  2813.    <category term="Boldport"/>
  2814.    <category term="PCB Design"/>
  2815.    <category term="Oscillators"/>
  2816.  </entry>
  2817.  <entry>
  2818.    <id>https://leap.tardate.com/BoldportClub/Pease/</id>
  2819.    <link href="https://leap.tardate.com/BoldportClub/Pease/"/>
  2820.    <updated>2016-10-15T05:40:03Z</updated>
  2821.    <title>#256 BoldportClub/Pease</title>
  2822.    <summary>a Bob Pease tribute, LM331 voltage-to-frequency kit from The Boldport Club (Project #1)</summary>
  2823.    <g:image_link>https://leap.tardate.com/BoldportClub/Pease/assets/Pease_build.jpg</g:image_link>
  2824.    <category term="Boldport"/>
  2825.    <category term="PCB Design"/>
  2826.    <category term="LM331"/>
  2827.  </entry>
  2828.  <entry>
  2829.    <id>https://leap.tardate.com/playground/AvrHardwarePWM/ATtiny/</id>
  2830.    <link href="https://leap.tardate.com/playground/AvrHardwarePWM/ATtiny/"/>
  2831.    <updated>2016-10-14T12:48:34Z</updated>
  2832.    <title>#255 AvrHardwarePWM/ATtiny</title>
  2833.    <summary>all about hardware PWM and demonstrating the modes with the ATtiny85</summary>
  2834.    <g:image_link>https://leap.tardate.com/playground/AvrHardwarePWM/ATtiny/assets/ATtiny_build.jpg</g:image_link>
  2835.    <category term="ATtiny"/>
  2836.    <category term="ATmel"/>
  2837.    <category term="Arduino"/>
  2838.    <category term="PWM"/>
  2839.  </entry>
  2840.  <entry>
  2841.    <id>https://leap.tardate.com/playground/AvrHardwarePWM/</id>
  2842.    <link href="https://leap.tardate.com/playground/AvrHardwarePWM/"/>
  2843.    <updated>2016-10-11T17:06:19Z</updated>
  2844.    <title>#254 AvrHardwarePWM</title>
  2845.    <summary>all about hardware PWM and demonstrating the modes with the Arduino UNO/ATmega328</summary>
  2846.    <g:image_link>https://leap.tardate.com/playground/AvrHardwarePWM/assets/AvrHardwarePWM_build.jpg</g:image_link>
  2847.    <category term="ATmega"/>
  2848.    <category term="ATmel"/>
  2849.    <category term="Arduino"/>
  2850.    <category term="PWM"/>
  2851.  </entry>
  2852.  <entry>
  2853.    <id>https://leap.tardate.com/playground/ATtiny/ProgrammingShield/</id>
  2854.    <link href="https://leap.tardate.com/playground/ATtiny/ProgrammingShield/"/>
  2855.    <updated>2018-10-21T07:22:34Z</updated>
  2856.    <title>#253 ATtiny/ProgrammingShield</title>
  2857.    <summary>a custom ATtiny programming shield for Arduino ISP</summary>
  2858.    <g:image_link>https://leap.tardate.com/playground/ATtiny/ProgrammingShield/assets/ProgrammingShield_build.jpg</g:image_link>
  2859.    <category term="Arduino"/>
  2860.    <category term="ATmel"/>
  2861.  </entry>
  2862.  <entry>
  2863.    <id>https://leap.tardate.com/Electronics101/555Timer/MessageWaiting/</id>
  2864.    <link href="https://leap.tardate.com/Electronics101/555Timer/MessageWaiting/"/>
  2865.    <updated>2016-10-05T16:23:01Z</updated>
  2866.    <title>#252 MessageWaiting</title>
  2867.    <summary>two-LED flasher with a 555 and minimal components - turned into a &quot;message waiting&quot; indicator with some free-wired SMD construction</summary>
  2868.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/MessageWaiting/assets/MessageWaiting_build.jpg</g:image_link>
  2869.    <category term="LED"/>
  2870.    <category term="555 Timer"/>
  2871.  </entry>
  2872.  <entry>
  2873.    <id>https://leap.tardate.com/BoldportClub/TheLady/</id>
  2874.    <link href="https://leap.tardate.com/BoldportClub/TheLady/"/>
  2875.    <updated>2016-12-15T17:19:21Z</updated>
  2876.    <title>#251 BoldportClub/TheLady</title>
  2877.    <summary>a ladybird soldering and display kit from The Boldport Club (Project #4)</summary>
  2878.    <g:image_link>https://leap.tardate.com/BoldportClub/TheLady/assets/TheLady_build.jpg</g:image_link>
  2879.    <category term="Boldport"/>
  2880.    <category term="PCB Design"/>
  2881.    <category term="Bugs"/>
  2882.  </entry>
  2883.  <entry>
  2884.    <id>https://leap.tardate.com/playground/pedalShieldUno/AudioDSP/</id>
  2885.    <link href="https://leap.tardate.com/playground/pedalShieldUno/AudioDSP/"/>
  2886.    <updated>2016-10-02T14:57:18Z</updated>
  2887.    <title>#250 pedalShieldUno/AudioDSP</title>
  2888.    <summary>test and develop the AudioDSP library for programming the pedalSHIELD Uno</summary>
  2889.    <g:image_link>https://leap.tardate.com/playground/pedalShieldUno/AudioDSP/assets/AudioDSP_build.jpg</g:image_link>
  2890.    <category term="DSP"/>
  2891.    <category term="Guitar"/>
  2892.    <category term="Arduino"/>
  2893.  </entry>
  2894.  <entry>
  2895.    <id>https://leap.tardate.com/Electronics101/AudioAmps/GuitarPracticeAmp/</id>
  2896.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/GuitarPracticeAmp/"/>
  2897.    <updated>2017-07-27T17:50:06Z</updated>
  2898.    <title>#249 TDA2050 Guitar Practice Amp</title>
  2899.    <summary>single-channel 10W guitar practice amplifier based on the TDA2050</summary>
  2900.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/GuitarPracticeAmp/assets/GuitarPracticeAmp_build.jpg</g:image_link>
  2901.    <category term="OpAmp"/>
  2902.    <category term="Audio"/>
  2903.  </entry>
  2904.  <entry>
  2905.    <id>https://leap.tardate.com/Electronics101/Oscillators/PierceGateOscillator/</id>
  2906.    <link href="https://leap.tardate.com/Electronics101/Oscillators/PierceGateOscillator/"/>
  2907.    <updated>2019-03-26T11:22:03Z</updated>
  2908.    <title>#248 PierceGateOscillator</title>
  2909.    <summary>build and test a 4.27 MHz Pierce Gate Oscillator circuit using a 74LS14 schmitt inverter</summary>
  2910.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/PierceGateOscillator/assets/PierceGateOscillator_build.jpg</g:image_link>
  2911.    <category term="Oscillators"/>
  2912.    <category term="Crystal"/>
  2913.  </entry>
  2914.  <entry>
  2915.    <id>https://leap.tardate.com/playground/pedalShieldUno/</id>
  2916.    <link href="https://leap.tardate.com/playground/pedalShieldUno/"/>
  2917.    <updated>2016-09-23T10:37:24Z</updated>
  2918.    <title>#247 pedalShieldUno</title>
  2919.    <summary>build and test a genuine pedalSHIELD UNO Arduino-based guitar effects pedal</summary>
  2920.    <g:image_link>https://leap.tardate.com/playground/pedalShieldUno/assets/pedalShieldUno_build.jpg</g:image_link>
  2921.    <category term="DSP"/>
  2922.    <category term="Guitar"/>
  2923.    <category term="Arduino"/>
  2924.  </entry>
  2925.  <entry>
  2926.    <id>https://leap.tardate.com/Electronics101/Oscillators/CMOSOscillators/</id>
  2927.    <link href="https://leap.tardate.com/Electronics101/Oscillators/CMOSOscillators/"/>
  2928.    <updated>2019-04-20T06:52:07Z</updated>
  2929.    <title>#246 CMOS Oscillators</title>
  2930.    <summary>testing 4-pin CMOS oscillators - NCH060C, MCO-1510A</summary>
  2931.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/CMOSOscillators/assets/CMOSOscillators_build.jpg</g:image_link>
  2932.    <category term="CMOS"/>
  2933.    <category term="Oscillators"/>
  2934.  </entry>
  2935.  <entry>
  2936.    <id>https://leap.tardate.com/Electronics101/GeneralCurveTracer/</id>
  2937.    <link href="https://leap.tardate.com/Electronics101/GeneralCurveTracer/"/>
  2938.    <updated>2016-09-20T11:26:07Z</updated>
  2939.    <title>#245 GeneralCurveTracer</title>
  2940.    <summary>test a DC-powered general curve tracer circuit</summary>
  2941.    <g:image_link>https://leap.tardate.com/Electronics101/GeneralCurveTracer/assets/GeneralCurveTracer_build.jpg</g:image_link>
  2942.    <category term="BJT"/>
  2943.    <category term="Oscillators"/>
  2944.  </entry>
  2945.  <entry>
  2946.    <id>https://leap.tardate.com/Electronics101/Switches/DPDT/</id>
  2947.    <link href="https://leap.tardate.com/Electronics101/Switches/DPDT/"/>
  2948.    <updated>2016-09-21T17:26:16Z</updated>
  2949.    <title>#244 Switches/DPDT</title>
  2950.    <summary>all about double-pole, double-thow (DPDT) toggle switches</summary>
  2951.    <g:image_link>https://leap.tardate.com/Electronics101/Switches/DPDT/assets/DPDT_build.jpg</g:image_link>
  2952.    <category term="Switches"/>
  2953.  </entry>
  2954.  <entry>
  2955.    <id>https://leap.tardate.com/Electronics101/Switches/</id>
  2956.    <link href="https://leap.tardate.com/Electronics101/Switches/"/>
  2957.    <updated>2016-09-19T23:54:46Z</updated>
  2958.    <title>#243 Switches</title>
  2959.    <summary>Notes on miscellaneous mechanical switches used in electrical circuits</summary>
  2960.    <g:image_link>https://leap.tardate.com/Electronics101/Switches/assets/Switches_build.jpg</g:image_link>
  2961.    <category term="Switches"/>
  2962.  </entry>
  2963.  <entry>
  2964.    <id>https://leap.tardate.com/Electronics101/Oscillators/PierceOscillator/</id>
  2965.    <link href="https://leap.tardate.com/Electronics101/Oscillators/PierceOscillator/"/>
  2966.    <updated>2019-03-26T11:22:03Z</updated>
  2967.    <title>#242 PierceOscillator</title>
  2968.    <summary>test a Pierce Oscillator made with a minimum of components</summary>
  2969.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/PierceOscillator/assets/PierceOscillator_build.jpg</g:image_link>
  2970.    <category term="Oscillators"/>
  2971.    <category term="Crystal"/>
  2972.  </entry>
  2973.  <entry>
  2974.    <id>https://leap.tardate.com/Electronics101/AudioAmps/GeneralPurpose358/</id>
  2975.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/GeneralPurpose358/"/>
  2976.    <updated>2016-09-05T14:27:19Z</updated>
  2977.    <title>#241 GeneralPurpose358</title>
  2978.    <summary>test a general-purpose LM358 amplifier circuit</summary>
  2979.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/GeneralPurpose358/assets/GeneralPurpose358_build.jpg</g:image_link>
  2980.    <category term="OpAmp"/>
  2981.    <category term="Audio"/>
  2982.  </entry>
  2983.  <entry>
  2984.    <id>https://leap.tardate.com/playground/DigitalInputWithAnalogPins/</id>
  2985.    <link href="https://leap.tardate.com/playground/DigitalInputWithAnalogPins/"/>
  2986.    <updated>2016-09-02T11:10:00Z</updated>
  2987.    <title>#240 DigitalInputWithAnalogPins</title>
  2988.    <summary>demonstrate how analog pins can also be used as a digital GPIO</summary>
  2989.    <g:image_link>https://leap.tardate.com/playground/DigitalInputWithAnalogPins/assets/DigitalInputWithAnalogPins_build.jpg</g:image_link>
  2990.    <category term="Arduino"/>
  2991.  </entry>
  2992.  <entry>
  2993.    <id>https://leap.tardate.com/playground/AudioDSP/SuperCrunch/</id>
  2994.    <link href="https://leap.tardate.com/playground/AudioDSP/SuperCrunch/"/>
  2995.    <updated>2016-08-28T13:01:11Z</updated>
  2996.    <title>#239 AudioDSP/SuperCrunch</title>
  2997.    <summary>arduino DSP crunchy symmetrical Schetzen distortion effect based on the pedalSHIELD by electrosmash</summary>
  2998.    <g:image_link>https://leap.tardate.com/playground/AudioDSP/SuperCrunch/assets/SuperCrunch_build.jpg</g:image_link>
  2999.    <category term="Audio"/>
  3000.    <category term="Arduino"/>
  3001.    <category term="DSP"/>
  3002.    <category term="OpAmp"/>
  3003.  </entry>
  3004.  <entry>
  3005.    <id>https://leap.tardate.com/playground/AudioDSP/Crunch/</id>
  3006.    <link href="https://leap.tardate.com/playground/AudioDSP/Crunch/"/>
  3007.    <updated>2016-08-28T13:01:11Z</updated>
  3008.    <title>#238 AudioDSP/Crunch</title>
  3009.    <summary>arduino DSP crunchy distortion effect based on the pedalSHIELD by electrosmash</summary>
  3010.    <g:image_link>https://leap.tardate.com/playground/AudioDSP/Crunch/assets/Crunch_build.jpg</g:image_link>
  3011.    <category term="Audio"/>
  3012.    <category term="Arduino"/>
  3013.    <category term="DSP"/>
  3014.    <category term="OpAmp"/>
  3015.  </entry>
  3016.  <entry>
  3017.    <id>https://leap.tardate.com/playground/AudioDSP/Distortion/</id>
  3018.    <link href="https://leap.tardate.com/playground/AudioDSP/Distortion/"/>
  3019.    <updated>2016-08-28T13:01:11Z</updated>
  3020.    <title>#237 AudioDSP/Distortion</title>
  3021.    <summary>arduino DSP simple distortion effect based on the pedalSHIELD by electrosmash</summary>
  3022.    <g:image_link>https://leap.tardate.com/playground/AudioDSP/Distortion/assets/Distortion_build.jpg</g:image_link>
  3023.    <category term="Audio"/>
  3024.    <category term="Arduino"/>
  3025.    <category term="DSP"/>
  3026.    <category term="OpAmp"/>
  3027.  </entry>
  3028.  <entry>
  3029.    <id>https://leap.tardate.com/playground/AudioDSP/Boost/</id>
  3030.    <link href="https://leap.tardate.com/playground/AudioDSP/Boost/"/>
  3031.    <updated>2016-08-28T13:01:11Z</updated>
  3032.    <title>#236 AudioDSP/Boost</title>
  3033.    <summary>arduino DSP boost effect based on the pedalSHIELD by electrosmash</summary>
  3034.    <g:image_link>https://leap.tardate.com/playground/AudioDSP/Boost/assets/Boost_build.jpg</g:image_link>
  3035.    <category term="Audio"/>
  3036.    <category term="Arduino"/>
  3037.    <category term="DSP"/>
  3038.    <category term="OpAmp"/>
  3039.  </entry>
  3040.  <entry>
  3041.    <id>https://leap.tardate.com/playground/AudioDSP/</id>
  3042.    <link href="https://leap.tardate.com/playground/AudioDSP/"/>
  3043.    <updated>2016-08-21T06:09:12Z</updated>
  3044.    <title>#235 AudioDSP</title>
  3045.    <summary>build and test an arduino DSP circuit based on the pedalSHIELD by electrosmash</summary>
  3046.    <g:image_link>https://leap.tardate.com/playground/AudioDSP/assets/AudioDSP_build.jpg</g:image_link>
  3047.    <category term="Audio"/>
  3048.    <category term="Arduino"/>
  3049.    <category term="DSP"/>
  3050.    <category term="OpAmp"/>
  3051.  </entry>
  3052.  <entry>
  3053.    <id>https://leap.tardate.com/Electronics101/CMOSInverterOscillator/</id>
  3054.    <link href="https://leap.tardate.com/Electronics101/CMOSInverterOscillator/"/>
  3055.    <updated>2016-08-13T07:39:10Z</updated>
  3056.    <title>#234 CMOSInverterOscillator</title>
  3057.    <summary>use a CD4096 to generate an oscillating waveform and plot the results</summary>
  3058.    <g:image_link>https://leap.tardate.com/Electronics101/CMOSInverterOscillator/assets/CMOSInverterOscillator_build.jpg</g:image_link>
  3059.    <category term="CMOS"/>
  3060.    <category term="Oscillators"/>
  3061.  </entry>
  3062.  <entry>
  3063.    <id>https://leap.tardate.com/Electronics101/PWM/GeneralPurposeHighSideController/</id>
  3064.    <link href="https://leap.tardate.com/Electronics101/PWM/GeneralPurposeHighSideController/"/>
  3065.    <updated>2016-08-13T07:39:10Z</updated>
  3066.    <title>#233 PWM/GeneralPurposeHighSideController</title>
  3067.    <summary>build and test a general-purpose high-side PWM controller</summary>
  3068.    <g:image_link>https://leap.tardate.com/Electronics101/PWM/GeneralPurposeHighSideController/assets/GeneralPurposeHighSideController_build.jpg</g:image_link>
  3069.    <category term="PWM"/>
  3070.    <category term="555 Timer"/>
  3071.    <category term="Oscillators"/>
  3072.    <category term="Power"/>
  3073.  </entry>
  3074.  <entry>
  3075.    <id>https://leap.tardate.com/Electronics101/LEDDimmer/555PWM/</id>
  3076.    <link href="https://leap.tardate.com/Electronics101/LEDDimmer/555PWM/"/>
  3077.    <updated>2016-08-13T07:39:10Z</updated>
  3078.    <title>#232 LEDDimmer/555PWM</title>
  3079.    <summary>test a PWM LED dimmer circuit using a 555 timer</summary>
  3080.    <g:image_link>https://leap.tardate.com/Electronics101/LEDDimmer/555PWM/assets/555PWM_build.jpg</g:image_link>
  3081.    <category term="LED"/>
  3082.    <category term="Power"/>
  3083.    <category term="555 Timer"/>
  3084.  </entry>
  3085.  <entry>
  3086.    <id>https://leap.tardate.com/Electronics101/LEDDimmer/CurrentRegulator/</id>
  3087.    <link href="https://leap.tardate.com/Electronics101/LEDDimmer/CurrentRegulator/"/>
  3088.    <updated>2016-08-13T07:39:10Z</updated>
  3089.    <title>#231 LEDDimmer/CurrentRegulator</title>
  3090.    <summary>test a current-regulator style LED dimmer circuit</summary>
  3091.    <g:image_link>https://leap.tardate.com/Electronics101/LEDDimmer/CurrentRegulator/assets/CurrentRegulator_build.jpg</g:image_link>
  3092.    <category term="LED"/>
  3093.    <category term="Power"/>
  3094.  </entry>
  3095.  <entry>
  3096.    <id>https://leap.tardate.com/Electronics101/MinimalLCOscillator/</id>
  3097.    <link href="https://leap.tardate.com/Electronics101/MinimalLCOscillator/"/>
  3098.    <updated>2016-08-08T10:58:45Z</updated>
  3099.    <title>#230 MinimalLCOscillator</title>
  3100.    <summary>test an LC oscillator of just 5 components</summary>
  3101.    <g:image_link>https://leap.tardate.com/Electronics101/MinimalLCOscillator/assets/MinimalLCOscillator_build.jpg</g:image_link>
  3102.    <category term="LC"/>
  3103.    <category term="Oscillators"/>
  3104.  </entry>
  3105.  <entry>
  3106.    <id>https://leap.tardate.com/Electronics101/555Timer/Dice/</id>
  3107.    <link href="https://leap.tardate.com/Electronics101/555Timer/Dice/"/>
  3108.    <updated>2016-08-08T10:58:45Z</updated>
  3109.    <title>#229 Dice</title>
  3110.    <summary>a 555/4017-based dice circuit with slow-down and auto power-off</summary>
  3111.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/Dice/assets/Dice_build.jpg</g:image_link>
  3112.    <category term="555 Timer"/>
  3113.    <category term="CMOS"/>
  3114.  </entry>
  3115.  <entry>
  3116.    <id>https://leap.tardate.com/Electronics101/TransistorCurveTracer/</id>
  3117.    <link href="https://leap.tardate.com/Electronics101/TransistorCurveTracer/"/>
  3118.    <updated>2016-07-24T03:28:05Z</updated>
  3119.    <title>#228 TransistorCurveTracer</title>
  3120.    <summary>simple NPN transistor curve tracer using a Stairstep generator circuit</summary>
  3121.    <g:image_link>https://leap.tardate.com/Electronics101/TransistorCurveTracer/assets/TransistorCurveTracer_build.jpg</g:image_link>
  3122.    <category term="OpAmp"/>
  3123.    <category term="555 Timer"/>
  3124.    <category term="Oscillators"/>
  3125.  </entry>
  3126.  <entry>
  3127.    <id>https://leap.tardate.com/Electronics101/555Timer/KnightRider/</id>
  3128.    <link href="https://leap.tardate.com/Electronics101/555Timer/KnightRider/"/>
  3129.    <updated>2016-07-11T14:13:48Z</updated>
  3130.    <title>#227 KnightRider</title>
  3131.    <summary>the familiar &quot;Knight-Rider&quot; LED circuit using a 555 and 4017</summary>
  3132.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/KnightRider/assets/KnightRider_build.jpg</g:image_link>
  3133.    <category term="555 Timer"/>
  3134.    <category term="CMOS"/>
  3135.    <category term="LED"/>
  3136.  </entry>
  3137.  <entry>
  3138.    <id>https://leap.tardate.com/Electronics101/MusicBoxKit/</id>
  3139.    <link href="https://leap.tardate.com/Electronics101/MusicBoxKit/"/>
  3140.    <updated>2016-07-03T06:44:37Z</updated>
  3141.    <title>#226 MusicBoxKit</title>
  3142.    <summary>build and test a Music Box kit, and run a demonstration under Arduino control</summary>
  3143.    <g:image_link>https://leap.tardate.com/Electronics101/MusicBoxKit/assets/MusicBoxKit_build.jpg</g:image_link>
  3144.    <category term="Music"/>
  3145.    <category term="Arduino"/>
  3146.  </entry>
  3147.  <entry>
  3148.    <id>https://leap.tardate.com/Kinetics/FQ777-954/TearDown/</id>
  3149.    <link href="https://leap.tardate.com/Kinetics/FQ777-954/TearDown/"/>
  3150.    <updated>2016-06-29T13:43:20Z</updated>
  3151.    <title>#225 FQ777-954/TearDown</title>
  3152.    <summary>teardown an FQ777-954 nano drone and figure out as much of the technical design as possible</summary>
  3153.    <g:image_link>https://leap.tardate.com/Kinetics/FQ777-954/TearDown/assets/TearDown_build.jpg</g:image_link>
  3154.    <category term="Drones"/>
  3155.    <category term="Radio"/>
  3156.  </entry>
  3157.  <entry>
  3158.    <id>https://leap.tardate.com/Electronics101/LEDStrobeKit/</id>
  3159.    <link href="https://leap.tardate.com/Electronics101/LEDStrobeKit/"/>
  3160.    <updated>2016-06-23T13:26:23Z</updated>
  3161.    <title>#224 LEDStrobeKit</title>
  3162.    <summary>build and analyse a common LED strobe kit</summary>
  3163.    <g:image_link>https://leap.tardate.com/Electronics101/LEDStrobeKit/assets/LEDStrobeKit_build.jpg</g:image_link>
  3164.    <category term="LED"/>
  3165.    <category term="555 Timer"/>
  3166.    <category term="CMOS"/>
  3167.  </entry>
  3168.  <entry>
  3169.    <id>https://leap.tardate.com/FritzingParts/</id>
  3170.    <link href="https://leap.tardate.com/FritzingParts/"/>
  3171.    <updated>2016-06-23T13:26:23Z</updated>
  3172.    <title>#223 Fritzing Parts</title>
  3173.    <summary>my collection of custom Fritzing Parts</summary>
  3174.    <g:image_link>https://leap.tardate.com/FritzingParts/assets/FritzingParts_build.jpg</g:image_link>
  3175.    <category term="EDA"/>
  3176.  </entry>
  3177.  <entry>
  3178.    <id>https://leap.tardate.com/Electronics101/StairStepGenerator/</id>
  3179.    <link href="https://leap.tardate.com/Electronics101/StairStepGenerator/"/>
  3180.    <updated>2016-06-16T14:29:03Z</updated>
  3181.    <title>#222 StairStepGenerator</title>
  3182.    <summary>generate a stair-step waveform with analog components</summary>
  3183.    <g:image_link>https://leap.tardate.com/Electronics101/StairStepGenerator/assets/StairStepGenerator_build.jpg</g:image_link>
  3184.    <category term="OpAmp"/>
  3185.    <category term="555 Timer"/>
  3186.    <category term="Oscillators"/>
  3187.  </entry>
  3188.  <entry>
  3189.    <id>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/XOR/</id>
  3190.    <link href="https://leap.tardate.com/Electronics101/ResistorTransistorLogic/XOR/"/>
  3191.    <updated>2016-06-09T16:47:20Z</updated>
  3192.    <title>#221 ResistorTransistorLogic/XOR</title>
  3193.    <summary>test the basic resistor-transistor logic XOR gate/XOR</summary>
  3194.    <g:image_link>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/XOR/assets/XOR_build.jpg</g:image_link>
  3195.    <category term="BJT"/>
  3196.    <category term="RTL"/>
  3197.    <category term="Logic Gates"/>
  3198.  </entry>
  3199.  <entry>
  3200.    <id>https://leap.tardate.com/playground/GccToolchain/</id>
  3201.    <link href="https://leap.tardate.com/playground/GccToolchain/"/>
  3202.    <updated>2016-06-23T13:26:23Z</updated>
  3203.    <title>#220 AVR GCC Toolchain</title>
  3204.    <summary>programming an Arduino with C and a command line</summary>
  3205.    <g:image_link>https://leap.tardate.com/playground/GccToolchain/assets/GccToolchain_build.jpg</g:image_link>
  3206.    <category term="avr-gcc"/>
  3207.    <category term="avrdude"/>
  3208.  </entry>
  3209.  <entry>
  3210.    <id>https://leap.tardate.com/playground/DS18S20/OneWireReading/</id>
  3211.    <link href="https://leap.tardate.com/playground/DS18S20/OneWireReading/"/>
  3212.    <updated>2016-06-06T16:28:39Z</updated>
  3213.    <title>#219 DS18S20/OneWireReading</title>
  3214.    <summary>basic interrogation of a DS18S20 using 1-wire protocol</summary>
  3215.    <g:image_link>https://leap.tardate.com/playground/DS18S20/OneWireReading/assets/OneWireReading_build.jpg</g:image_link>
  3216.    <category term="Sensors"/>
  3217.    <category term="Arduino"/>
  3218.  </entry>
  3219.  <entry>
  3220.    <id>https://leap.tardate.com/playground/MPU6050/AccelGyroTest/</id>
  3221.    <link href="https://leap.tardate.com/playground/MPU6050/AccelGyroTest/"/>
  3222.    <updated>2016-06-05T15:18:46Z</updated>
  3223.    <title>#218 MPU6050/AccelGyroTest</title>
  3224.    <summary>first test of an Invensense MPU-6050 3-Axes Accelerometer Gyroscope Module</summary>
  3225.    <g:image_link>https://leap.tardate.com/playground/MPU6050/AccelGyroTest/assets/AccelGyroTest_build.jpg</g:image_link>
  3226.    <category term="Sensors"/>
  3227.    <category term="MPU-6050"/>
  3228.    <category term="Arduino"/>
  3229.  </entry>
  3230.  <entry>
  3231.    <id>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/BasicBuckAvrControl/</id>
  3232.    <link href="https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/BasicBuckAvrControl/"/>
  3233.    <updated>2017-05-06T10:20:26Z</updated>
  3234.    <title>#217 BasicBuckAvrControl</title>
  3235.    <summary>a simple buck converter circuit from first principles</summary>
  3236.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchModePowerSupplies/BasicBuckAvrControl/assets/BasicBuckAvrControl_build.jpg</g:image_link>
  3237.    <category term="Power"/>
  3238.    <category term="Arduino"/>
  3239.  </entry>
  3240.  <entry>
  3241.    <id>https://leap.tardate.com/OSHChip/LEDx16Module/</id>
  3242.    <link href="https://leap.tardate.com/OSHChip/LEDx16Module/"/>
  3243.    <updated>2016-05-22T18:28:31Z</updated>
  3244.    <title>#216 OSHChip/LEDx16Module</title>
  3245.    <summary>driving an SPI LED module with the OSHChip</summary>
  3246.    <g:image_link>https://leap.tardate.com/OSHChip/LEDx16Module/assets/LEDx16Module_build.jpg</g:image_link>
  3247.    <category term="OSHChip"/>
  3248.    <category term="SPI"/>
  3249.  </entry>
  3250.  <entry>
  3251.    <id>https://leap.tardate.com/OSHChip/YottaToolchain/</id>
  3252.    <link href="https://leap.tardate.com/OSHChip/YottaToolchain/"/>
  3253.    <updated>2016-05-17T15:55:03Z</updated>
  3254.    <title>#215 OSHChip/YottaToolchain</title>
  3255.    <summary>build a simple program using the Official Yotta target for OSHChip and gcc on MacOSX</summary>
  3256.    <g:image_link>https://leap.tardate.com/OSHChip/YottaToolchain/assets/YottaToolchain_build.jpg</g:image_link>
  3257.    <category term="ARM"/>
  3258.    <category term="gcc"/>
  3259.    <category term="yotta"/>
  3260.    <category term="OSHChip"/>
  3261.  </entry>
  3262.  <entry>
  3263.    <id>https://leap.tardate.com/OSHChip/GccToolchain/</id>
  3264.    <link href="https://leap.tardate.com/OSHChip/GccToolchain/"/>
  3265.    <updated>2016-05-17T15:55:03Z</updated>
  3266.    <title>#214 OSHChip/GccToolchain</title>
  3267.    <summary>can I build a program for the OSHChip using the gcc toolchain and Nordic Semi SDK on MacOSX?</summary>
  3268.    <g:image_link>https://leap.tardate.com/OSHChip/GccToolchain/assets/GccToolchain_build.jpg</g:image_link>
  3269.    <category term="ARM"/>
  3270.    <category term="gcc"/>
  3271.    <category term="OSHChip"/>
  3272.  </entry>
  3273.  <entry>
  3274.    <id>https://leap.tardate.com/OSHChip/blinky/</id>
  3275.    <link href="https://leap.tardate.com/OSHChip/blinky/"/>
  3276.    <updated>2016-05-17T15:55:03Z</updated>
  3277.    <title>#213 OSHChip/blinky</title>
  3278.    <summary>first tests of the OSHChip nRF51822-CFAC-A0 in DIP16 packaging</summary>
  3279.    <g:image_link>https://leap.tardate.com/OSHChip/blinky/assets/blinky_build.jpg</g:image_link>
  3280.    <category term="ARM"/>
  3281.    <category term="OSHChip"/>
  3282.  </entry>
  3283.  <entry>
  3284.    <id>https://leap.tardate.com/Electronics101/StayCreative/</id>
  3285.    <link href="https://leap.tardate.com/Electronics101/StayCreative/"/>
  3286.    <updated>2016-05-10T14:19:24Z</updated>
  3287.    <title>#212 StayCreative</title>
  3288.    <summary>an audio level VU meter driving a custom LED sign</summary>
  3289.    <g:image_link>https://leap.tardate.com/Electronics101/StayCreative/assets/StayCreative_build.jpg</g:image_link>
  3290.    <category term="Audio"/>
  3291.    <category term="LED"/>
  3292.  </entry>
  3293.  <entry>
  3294.    <id>https://leap.tardate.com/Electronics101/BuckConverterModules/</id>
  3295.    <link href="https://leap.tardate.com/Electronics101/BuckConverterModules/"/>
  3296.    <updated>2016-06-23T13:26:23Z</updated>
  3297.    <title>#211 BuckConverterModules</title>
  3298.    <summary>test a range of low-cost buck converter modules, often using LM2596</summary>
  3299.    <g:image_link>https://leap.tardate.com/Electronics101/BuckConverterModules/assets/BuckConverterModules_build.jpg</g:image_link>
  3300.    <category term="Power"/>
  3301.  </entry>
  3302.  <entry>
  3303.    <id>https://leap.tardate.com/Electronics101/AudioAmps/TDA7297Kit/</id>
  3304.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/TDA7297Kit/"/>
  3305.    <updated>2016-05-07T13:08:14Z</updated>
  3306.    <title>#210 TDA7297 Audio Amp Kit</title>
  3307.    <summary>testing a TDA7297 audio amplifier kit (pump up the jam)</summary>
  3308.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/TDA7297Kit/assets/TDA7297Kit_build.jpg</g:image_link>
  3309.    <category term="Audio"/>
  3310.  </entry>
  3311.  <entry>
  3312.    <id>https://leap.tardate.com/playground/LedPanelDisplay72R02/</id>
  3313.    <link href="https://leap.tardate.com/playground/LedPanelDisplay72R02/"/>
  3314.    <updated>2016-05-01T17:45:19Z</updated>
  3315.    <title>#209 LedPanelDisplay72R02</title>
  3316.    <summary>test a 7-digit &amp; 7-status indicator LED display</summary>
  3317.    <g:image_link>https://leap.tardate.com/playground/LedPanelDisplay72R02/assets/LedPanelDisplay72R02_build.jpg</g:image_link>
  3318.    <category term="LED"/>
  3319.    <category term="Arduino"/>
  3320.  </entry>
  3321.  <entry>
  3322.    <id>https://leap.tardate.com/Radio/FM/SingleStageTransmitterKit/</id>
  3323.    <link href="https://leap.tardate.com/Radio/FM/SingleStageTransmitterKit/"/>
  3324.    <updated>2019-08-06T17:20:09Z</updated>
  3325.    <title>#208 Single-stage FM Transmitter Kit</title>
  3326.    <summary>build a simple single-stage FK702 FM Transmitter Kit by Future Kit</summary>
  3327.    <g:image_link>https://leap.tardate.com/Radio/FM/SingleStageTransmitterKit/assets/SingleStageTransmitterKit_build.jpg</g:image_link>
  3328.    <category term="Radio"/>
  3329.    <category term="FM"/>
  3330.    <category term="Transmitter"/>
  3331.  </entry>
  3332.  <entry>
  3333.    <id>https://leap.tardate.com/Electronics101/FrequencyCounter/</id>
  3334.    <link href="https://leap.tardate.com/Electronics101/FrequencyCounter/"/>
  3335.    <updated>2016-04-24T12:44:35Z</updated>
  3336.    <title>#207 FrequencyCounter</title>
  3337.    <summary>test a CMOS frequency counter circuit with 100Hz - 5MHz range</summary>
  3338.    <g:image_link>https://leap.tardate.com/Electronics101/FrequencyCounter/assets/FrequencyCounter_build.jpg</g:image_link>
  3339.    <category term="CMOS"/>
  3340.    <category term="Oscillators"/>
  3341.  </entry>
  3342.  <entry>
  3343.    <id>https://leap.tardate.com/Electronics101/CD4047/AstableOscillator/</id>
  3344.    <link href="https://leap.tardate.com/Electronics101/CD4047/AstableOscillator/"/>
  3345.    <updated>2016-04-22T22:42:25Z</updated>
  3346.    <title>#206 CD4047/AstableOscillator</title>
  3347.    <summary>test the astable operating mode of the CD4047</summary>
  3348.    <g:image_link>https://leap.tardate.com/Electronics101/CD4047/AstableOscillator/assets/AstableOscillator_build.jpg</g:image_link>
  3349.    <category term="CMOS/TTL"/>
  3350.    <category term="Oscillators"/>
  3351.  </entry>
  3352.  <entry>
  3353.    <id>https://leap.tardate.com/Electronics101/TriacDimmer/</id>
  3354.    <link href="https://leap.tardate.com/Electronics101/TriacDimmer/"/>
  3355.    <updated>2016-04-17T13:29:16Z</updated>
  3356.    <title>#205 TriacDimmer</title>
  3357.    <summary>investigate the operation of triacs and build the basic dimmaer circuit</summary>
  3358.    <g:image_link>https://leap.tardate.com/Electronics101/TriacDimmer/assets/TriacDimmer_build.jpg</g:image_link>
  3359.    <category term="Triac"/>
  3360.    <category term="Thyristor"/>
  3361.  </entry>
  3362.  <entry>
  3363.    <id>https://leap.tardate.com/playground/TemperatureLoggerTypeK/</id>
  3364.    <link href="https://leap.tardate.com/playground/TemperatureLoggerTypeK/"/>
  3365.    <updated>2016-04-16T00:37:20Z</updated>
  3366.    <title>#204 TemperatureLoggerTypeK</title>
  3367.    <summary>simple high-temperature monitor using Type K (differential) and LM35 (cold-junction) sensors</summary>
  3368.    <g:image_link>https://leap.tardate.com/playground/TemperatureLoggerTypeK/assets/TemperatureLoggerTypeK_build.jpg</g:image_link>
  3369.    <category term="Sensors"/>
  3370.    <category term="Thermocouple"/>
  3371.    <category term="Arduino"/>
  3372.  </entry>
  3373.  <entry>
  3374.    <id>https://leap.tardate.com/Kinetics/HomopolarMotor/</id>
  3375.    <link href="https://leap.tardate.com/Kinetics/HomopolarMotor/"/>
  3376.    <updated>2016-04-16T00:37:20Z</updated>
  3377.    <title>#203 HomopolarMotor</title>
  3378.    <summary>build a basic homopolar motor</summary>
  3379.    <g:image_link>https://leap.tardate.com/Kinetics/HomopolarMotor/assets/HomopolarMotor_build.jpg</g:image_link>
  3380.    <category term="Kinetics"/>
  3381.  </entry>
  3382.  <entry>
  3383.    <id>https://leap.tardate.com/Electronics101/AudioLevelIndicatorKit/</id>
  3384.    <link href="https://leap.tardate.com/Electronics101/AudioLevelIndicatorKit/"/>
  3385.    <updated>2016-04-10T04:29:26Z</updated>
  3386.    <title>#202 AudioLevelIndicatorKit</title>
  3387.    <summary>an audio level indicator kit based on the LM3915</summary>
  3388.    <g:image_link>https://leap.tardate.com/Electronics101/AudioLevelIndicatorKit/assets/AudioLevelIndicatorKit_build.jpg</g:image_link>
  3389.    <category term="LM3915"/>
  3390.    <category term="Audio"/>
  3391.  </entry>
  3392.  <entry>
  3393.    <id>https://leap.tardate.com/Electronics101/555Timer/DoorbellKit/</id>
  3394.    <link href="https://leap.tardate.com/Electronics101/555Timer/DoorbellKit/"/>
  3395.    <updated>2016-04-05T17:55:07Z</updated>
  3396.    <title>#201 555 Timer Doorbell Kit</title>
  3397.    <summary>another two-tone doorbell using a 555 timer oscillator</summary>
  3398.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/DoorbellKit/assets/DoorbellKit_build.jpg</g:image_link>
  3399.    <category term="555 Timer"/>
  3400.    <category term="Oscillators"/>
  3401.  </entry>
  3402.  <entry>
  3403.    <id>https://leap.tardate.com/Kinetics/Solenoids/SolenoidMotor/</id>
  3404.    <link href="https://leap.tardate.com/Kinetics/Solenoids/SolenoidMotor/"/>
  3405.    <updated>2019-08-19T14:38:51Z</updated>
  3406.    <title>#200 Solenoid Motor</title>
  3407.    <summary>a single-cylinder mini-solenoid engine</summary>
  3408.    <g:image_link>https://leap.tardate.com/Kinetics/Solenoids/SolenoidMotor/assets/SolenoidMotor_build.jpg</g:image_link>
  3409.    <category term="Solenoid"/>
  3410.  </entry>
  3411.  <entry>
  3412.    <id>https://leap.tardate.com/playground/LED7Segment/CD4026BucketBrigade/</id>
  3413.    <link href="https://leap.tardate.com/playground/LED7Segment/CD4026BucketBrigade/"/>
  3414.    <updated>2016-03-21T15:45:43Z</updated>
  3415.    <title>#199 LED7Segment/CD4026BucketBrigade</title>
  3416.    <summary>a CD4026 bucket-brigade for driving multiple 7-segment displays</summary>
  3417.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/CD4026BucketBrigade/assets/CD4026BucketBrigade_build.jpg</g:image_link>
  3418.    <category term="7-Segment"/>
  3419.    <category term="CMOS"/>
  3420.    <category term="Arduino"/>
  3421.  </entry>
  3422.  <entry>
  3423.    <id>https://leap.tardate.com/Electronics101/HallEffectSwitch/</id>
  3424.    <link href="https://leap.tardate.com/Electronics101/HallEffectSwitch/"/>
  3425.    <updated>2019-08-19T14:38:51Z</updated>
  3426.    <title>#198 Hall Effect Switch</title>
  3427.    <summary>using a Hall effect switch (A3144)</summary>
  3428.    <g:image_link>https://leap.tardate.com/Electronics101/HallEffectSwitch/assets/HallEffectSwitch_build.jpg</g:image_link>
  3429.    <category term="Sensors"/>
  3430.  </entry>
  3431.  <entry>
  3432.    <id>https://leap.tardate.com/Electronics101/WienBridgeAudioToneGenerator/</id>
  3433.    <link href="https://leap.tardate.com/Electronics101/WienBridgeAudioToneGenerator/"/>
  3434.    <updated>2016-03-20T02:22:54Z</updated>
  3435.    <title>#197 WienBridgeAudioToneGenerator</title>
  3436.    <summary>fixed-frequency tone generator based on a Wien Bridge Oscillator</summary>
  3437.    <g:image_link>https://leap.tardate.com/Electronics101/WienBridgeAudioToneGenerator/assets/WienBridgeAudioToneGenerator_build.jpg</g:image_link>
  3438.    <category term="OpAmp"/>
  3439.    <category term="Oscillators"/>
  3440.  </entry>
  3441.  <entry>
  3442.    <id>https://leap.tardate.com/playground/LED7Segment/CD4026Drive/</id>
  3443.    <link href="https://leap.tardate.com/playground/LED7Segment/CD4026Drive/"/>
  3444.    <updated>2016-03-14T12:09:16Z</updated>
  3445.    <title>#196 LED7Segment/CD4026Drive</title>
  3446.    <summary>driving a 7-segment display with CD4026 Counter</summary>
  3447.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/CD4026Drive/assets/CD4026Drive_build.jpg</g:image_link>
  3448.    <category term="7-Segment"/>
  3449.    <category term="CMOS"/>
  3450.    <category term="Arduino"/>
  3451.  </entry>
  3452.  <entry>
  3453.    <id>https://leap.tardate.com/Electronics101/LCResonator/</id>
  3454.    <link href="https://leap.tardate.com/Electronics101/LCResonator/"/>
  3455.    <updated>2016-03-10T14:04:29Z</updated>
  3456.    <title>#195 LCResonator</title>
  3457.    <summary>measure the resonant frequency of an LC circuit or inductance of an inductor </summary>
  3458.    <g:image_link>https://leap.tardate.com/Electronics101/LCResonator/assets/LCResonator_build.jpg</g:image_link>
  3459.    <category term="Oscillators"/>
  3460.    <category term="LC"/>
  3461.  </entry>
  3462.  <entry>
  3463.    <id>https://leap.tardate.com/ESP8266/DIYDevBoard/</id>
  3464.    <link href="https://leap.tardate.com/ESP8266/DIYDevBoard/"/>
  3465.    <updated>2017-09-24T13:47:05Z</updated>
  3466.    <title>#194 ESP8266/DIYDevBoard</title>
  3467.    <summary>a DIY devboard for an ESP-01 ESP8266</summary>
  3468.    <g:image_link>https://leap.tardate.com/ESP8266/DIYDevBoard/assets/DIYDevBoard_build.jpg</g:image_link>
  3469.    <category term="ESP8266"/>
  3470.  </entry>
  3471.  <entry>
  3472.    <id>https://leap.tardate.com/Electronics101/PovShakeStickKit/</id>
  3473.    <link href="https://leap.tardate.com/Electronics101/PovShakeStickKit/"/>
  3474.    <updated>2016-03-03T01:22:05Z</updated>
  3475.    <title>#193 PovShakeStickKit</title>
  3476.    <summary>build and investigate an AT89S52-based &quot;shake stick&quot; kit</summary>
  3477.    <g:image_link>https://leap.tardate.com/Electronics101/PovShakeStickKit/assets/PovShakeStickKit_build.jpg</g:image_link>
  3478.    <category term="8051"/>
  3479.    <category term="LED"/>
  3480.  </entry>
  3481.  <entry>
  3482.    <id>https://leap.tardate.com/Kraft/SagradaFamilia/</id>
  3483.    <link href="https://leap.tardate.com/Kraft/SagradaFamilia/"/>
  3484.    <updated>2016-06-23T14:50:15Z</updated>
  3485.    <title>#192 Sagrada Família</title>
  3486.    <summary>a paper model with some LED effects</summary>
  3487.    <g:image_link>https://leap.tardate.com/Kraft/SagradaFamilia/assets/SagradaFamilia_build.jpg</g:image_link>
  3488.    <category term="LED"/>
  3489.    <category term="Craft"/>
  3490.  </entry>
  3491.  <entry>
  3492.    <id>https://leap.tardate.com/Electronics101/LowVoltageGlowingLEDs/</id>
  3493.    <link href="https://leap.tardate.com/Electronics101/LowVoltageGlowingLEDs/"/>
  3494.    <updated>2016-02-28T05:38:25Z</updated>
  3495.    <title>#191 Low-voltage Glowing LEDs</title>
  3496.    <summary>a dual-LED &quot;glowing&quot; oscillator from a 1.5V supply</summary>
  3497.    <g:image_link>https://leap.tardate.com/Electronics101/LowVoltageGlowingLEDs/assets/LowVoltageGlowingLEDs_build.jpg</g:image_link>
  3498.    <category term="BJT"/>
  3499.    <category term="LED"/>
  3500.    <category term="Oscillators"/>
  3501.    <category term="Power"/>
  3502.  </entry>
  3503.  <entry>
  3504.    <id>https://leap.tardate.com/playground/MultiSlaveSPI/</id>
  3505.    <link href="https://leap.tardate.com/playground/MultiSlaveSPI/"/>
  3506.    <updated>2016-02-22T01:16:33Z</updated>
  3507.    <title>#190 MultiSlaveSPI</title>
  3508.    <summary>using SPI to control multiple devices that support an SPIish interface</summary>
  3509.    <g:image_link>https://leap.tardate.com/playground/MultiSlaveSPI/assets/MultiSlaveSPI_build.jpg</g:image_link>
  3510.    <category term="SPI"/>
  3511.    <category term="Arduino"/>
  3512.  </entry>
  3513.  <entry>
  3514.    <id>https://leap.tardate.com/playground/LED7Segment/ShiftDriveSPI/</id>
  3515.    <link href="https://leap.tardate.com/playground/LED7Segment/ShiftDriveSPI/"/>
  3516.    <updated>2016-02-22T01:16:33Z</updated>
  3517.    <title>#189 LED7Segment/ShiftDriveSPI</title>
  3518.    <summary>using SPI to control a 7-segment display via a 74HC595 shift register</summary>
  3519.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/ShiftDriveSPI/assets/ShiftDriveSPI_build.jpg</g:image_link>
  3520.    <category term="7-Segment"/>
  3521.    <category term="CMOS/TTL"/>
  3522.    <category term="Arduino"/>
  3523.    <category term="SPI"/>
  3524.  </entry>
  3525.  <entry>
  3526.    <id>https://leap.tardate.com/playground/EEPROM/AT24C02/BasicReadWrite/</id>
  3527.    <link href="https://leap.tardate.com/playground/EEPROM/AT24C02/BasicReadWrite/"/>
  3528.    <updated>2016-02-22T01:16:33Z</updated>
  3529.    <title>#188 EEPROM/AT24C02/BasicReadWrite</title>
  3530.    <summary>basic read/write operations to external EEPROM (AT24C02) with the Wire library</summary>
  3531.    <g:image_link>https://leap.tardate.com/playground/EEPROM/AT24C02/BasicReadWrite/assets/BasicReadWrite_build.jpg</g:image_link>
  3532.    <category term="EEPROM"/>
  3533.    <category term="Arduino"/>
  3534.  </entry>
  3535.  <entry>
  3536.    <id>https://leap.tardate.com/playground/nRF24/PingPong/</id>
  3537.    <link href="https://leap.tardate.com/playground/nRF24/PingPong/"/>
  3538.    <updated>2016-02-18T18:30:09Z</updated>
  3539.    <title>#187 nRF24/PingPong</title>
  3540.    <summary>two Arduino's entertaining themselves with a game of &quot;ping pong&quot; over nRF24L01+ 2.4GHz RF</summary>
  3541.    <g:image_link>https://leap.tardate.com/playground/nRF24/PingPong/assets/PingPong_build.jpg</g:image_link>
  3542.    <category term="nRF24"/>
  3543.    <category term="Arduino"/>
  3544.  </entry>
  3545.  <entry>
  3546.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/AsyncJKCounter/</id>
  3547.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/AsyncJKCounter/"/>
  3548.    <updated>2017-05-25T13:46:13Z</updated>
  3549.    <title>#186 Asynchronous JK Counter</title>
  3550.    <summary>an asynchronous 4-bit counter built with JK Flip-Flops</summary>
  3551.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/AsyncJKCounter/assets/AsyncJKCounter_build.jpg</g:image_link>
  3552.    <category term="CMOS/TTL"/>
  3553.    <category term="Digital Logic"/>
  3554.  </entry>
  3555.  <entry>
  3556.    <id>https://leap.tardate.com/Kinetics/StirlingEngineHB13/</id>
  3557.    <link href="https://leap.tardate.com/Kinetics/StirlingEngineHB13/"/>
  3558.    <updated>2016-02-09T11:41:05Z</updated>
  3559.    <title>#185 StirlingEngineHB13</title>
  3560.    <summary>building the Böhm Stirling-Technik HB13 Small Bonsai engine</summary>
  3561.    <g:image_link>https://leap.tardate.com/Kinetics/StirlingEngineHB13/assets/StirlingEngineHB13_build.jpg</g:image_link>
  3562.    <category term="Kinetics"/>
  3563.  </entry>
  3564.  <entry>
  3565.    <id>https://leap.tardate.com/Electronics101/555Timer/AdjustablePulseGenerator/</id>
  3566.    <link href="https://leap.tardate.com/Electronics101/555Timer/AdjustablePulseGenerator/"/>
  3567.    <updated>2016-02-08T11:30:16Z</updated>
  3568.    <title>#184 AdjustablePulseGenerator</title>
  3569.    <summary>widely-adjustable square wave generator using the 555 timer</summary>
  3570.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/AdjustablePulseGenerator/assets/AdjustablePulseGenerator_build.jpg</g:image_link>
  3571.    <category term="555 Timer"/>
  3572.    <category term="Oscillators"/>
  3573.  </entry>
  3574.  <entry>
  3575.    <id>https://leap.tardate.com/Electronics101/PolarityTester/</id>
  3576.    <link href="https://leap.tardate.com/Electronics101/PolarityTester/"/>
  3577.    <updated>2016-02-07T16:41:17Z</updated>
  3578.    <title>#183 PolarityTester</title>
  3579.    <summary>demonstrate a polarity-testing circuit</summary>
  3580.    <g:image_link>https://leap.tardate.com/Electronics101/PolarityTester/assets/PolarityTester_build.jpg</g:image_link>
  3581.    <category term="Inverter"/>
  3582.    <category term="CMOS"/>
  3583.  </entry>
  3584.  <entry>
  3585.    <id>https://leap.tardate.com/Electronics101/PowerSupply317Kit/</id>
  3586.    <link href="https://leap.tardate.com/Electronics101/PowerSupply317Kit/"/>
  3587.    <updated>2016-02-07T02:35:30Z</updated>
  3588.    <title>#182 PowerSupply317Kit</title>
  3589.    <summary>build and test a mains-powered 1.25V-12V DC LM317 power supply kit</summary>
  3590.    <g:image_link>https://leap.tardate.com/Electronics101/PowerSupply317Kit/assets/PowerSupply317Kit_build.jpg</g:image_link>
  3591.    <category term="Power"/>
  3592.  </entry>
  3593.  <entry>
  3594.    <id>https://leap.tardate.com/Electronics101/VoltmeterModule/</id>
  3595.    <link href="https://leap.tardate.com/Electronics101/VoltmeterModule/"/>
  3596.    <updated>2016-02-06T07:40:24Z</updated>
  3597.    <title>#181 VoltmeterModule</title>
  3598.    <summary>test a 3-wire voltmeter module</summary>
  3599.    <g:image_link>https://leap.tardate.com/Electronics101/VoltmeterModule/assets/VoltmeterModule_build.jpg</g:image_link>
  3600.    <category term="Sensors"/>
  3601.  </entry>
  3602.  <entry>
  3603.    <id>https://leap.tardate.com/Electronics101/Oscillators/Colpitts/</id>
  3604.    <link href="https://leap.tardate.com/Electronics101/Oscillators/Colpitts/"/>
  3605.    <updated>2018-10-07T15:45:26Z</updated>
  3606.    <title>#180 ColpittsOscillator</title>
  3607.    <summary>testing a basic Colpitts Oscillator circuit</summary>
  3608.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/Colpitts/assets/Colpitts_build.jpg</g:image_link>
  3609.    <category term="LC"/>
  3610.    <category term="Oscillators"/>
  3611.  </entry>
  3612.  <entry>
  3613.    <id>https://leap.tardate.com/playground/LEDx16Module/</id>
  3614.    <link href="https://leap.tardate.com/playground/LEDx16Module/"/>
  3615.    <updated>2016-05-22T08:10:42Z</updated>
  3616.    <title>#179 LEDx16Module</title>
  3617.    <summary>a custom 16 LED SMD PCB with 74HC595 shift register interface</summary>
  3618.    <g:image_link>https://leap.tardate.com/playground/LEDx16Module/assets/LEDx16Module_build.jpg</g:image_link>
  3619.    <category term="CMOS/TTL"/>
  3620.    <category term="SMD"/>
  3621.    <category term="Arduino"/>
  3622.  </entry>
  3623.  <entry>
  3624.    <id>https://leap.tardate.com/playground/LED7Segment/ShiftDriveModule/</id>
  3625.    <link href="https://leap.tardate.com/playground/LED7Segment/ShiftDriveModule/"/>
  3626.    <updated>2016-02-22T01:16:33Z</updated>
  3627.    <title>#178 LED7Segment/ShiftDriveModule</title>
  3628.    <summary>a custom 7-segment display module PCB with 74HC595 shift register interface</summary>
  3629.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/ShiftDriveModule/assets/ShiftDriveModule_build.jpg</g:image_link>
  3630.    <category term="7-Segment"/>
  3631.    <category term="CMOS/TTL"/>
  3632.    <category term="Arduino"/>
  3633.    <category term="PCB"/>
  3634.  </entry>
  3635.  <entry>
  3636.    <id>https://leap.tardate.com/playground/LED7Segment/ShiftDrive/</id>
  3637.    <link href="https://leap.tardate.com/playground/LED7Segment/ShiftDrive/"/>
  3638.    <updated>2016-01-26T14:06:56Z</updated>
  3639.    <title>#177 LED7Segment/ShiftDrive</title>
  3640.    <summary>test control of a 7-segment display via a 74HC595 shift register</summary>
  3641.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/ShiftDrive/assets/ShiftDrive_build.jpg</g:image_link>
  3642.    <category term="7-Segment"/>
  3643.    <category term="CMOS/TTL"/>
  3644.    <category term="Arduino"/>
  3645.  </entry>
  3646.  <entry>
  3647.    <id>https://leap.tardate.com/Electronics101/nRF24Breakout/</id>
  3648.    <link href="https://leap.tardate.com/Electronics101/nRF24Breakout/"/>
  3649.    <updated>2016-02-17T13:53:39Z</updated>
  3650.    <title>#176 nRF24Breakout</title>
  3651.    <summary>a simple PCB breadboard adapter for 8-pin nRF24 modules</summary>
  3652.    <g:image_link>https://leap.tardate.com/Electronics101/nRF24Breakout/assets/nRF24Breakout_build.jpg</g:image_link>
  3653.    <category term="nRF24"/>
  3654.    <category term="PCB"/>
  3655.  </entry>
  3656.  <entry>
  3657.    <id>https://leap.tardate.com/Electronics101/SwitchSoftLatch/</id>
  3658.    <link href="https://leap.tardate.com/Electronics101/SwitchSoftLatch/"/>
  3659.    <updated>2016-01-07T01:28:46Z</updated>
  3660.    <title>#175 SwitchSoftLatch</title>
  3661.    <summary>test a soft-latching power switching circuit</summary>
  3662.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchSoftLatch/assets/SwitchSoftLatch_build.jpg</g:image_link>
  3663.    <category term="MOSFET"/>
  3664.    <category term="BJT"/>
  3665.  </entry>
  3666.  <entry>
  3667.    <id>https://leap.tardate.com/Electronics101/UsbNotifier/</id>
  3668.    <link href="https://leap.tardate.com/Electronics101/UsbNotifier/"/>
  3669.    <updated>2016-06-23T14:50:15Z</updated>
  3670.    <title>#174 UsbNotifier</title>
  3671.    <summary>tear-down and demo code for some oldUSB Webmail Notifier devices</summary>
  3672.    <g:image_link>https://leap.tardate.com/Electronics101/UsbNotifier/assets/UsbNotifier_build.jpg</g:image_link>
  3673.    <category term="LED"/>
  3674.    <category term="USB"/>
  3675.  </entry>
  3676.  <entry>
  3677.    <id>https://leap.tardate.com/playground/LEDCubes/Mini4/</id>
  3678.    <link href="https://leap.tardate.com/playground/LEDCubes/Mini4/"/>
  3679.    <updated>2016-01-02T17:17:48Z</updated>
  3680.    <title>#173 LEDCubes/Mini4</title>
  3681.    <summary>a mini 64 LED cube with an Atmel328 and 3 x 74HC595 register interface</summary>
  3682.    <g:image_link>https://leap.tardate.com/playground/LEDCubes/Mini4/assets/Mini4_build.jpg</g:image_link>
  3683.    <category term="LED"/>
  3684.    <category term="CMOS/TTL"/>
  3685.    <category term="Arduino"/>
  3686.  </entry>
  3687.  <entry>
  3688.    <id>https://leap.tardate.com/Electronics101/SCRLatch/</id>
  3689.    <link href="https://leap.tardate.com/Electronics101/SCRLatch/"/>
  3690.    <updated>2015-12-19T12:29:51Z</updated>
  3691.    <title>#172 SCRLatch</title>
  3692.    <summary>exploring the behaviour of low-power silicon controlled rectifiers (SCR)</summary>
  3693.    <g:image_link>https://leap.tardate.com/Electronics101/SCRLatch/assets/SCRLatch_build.jpg</g:image_link>
  3694.    <category term="SCR"/>
  3695.    <category term="Thyristor"/>
  3696.  </entry>
  3697.  <entry>
  3698.    <id>https://leap.tardate.com/Electronics101/SMDPracticeBoards/</id>
  3699.    <link href="https://leap.tardate.com/Electronics101/SMDPracticeBoards/"/>
  3700.    <updated>2016-06-23T14:50:15Z</updated>
  3701.    <title>#171 SMDPracticeBoards</title>
  3702.    <summary>a collection of notes, kits and resources for hand-soldering surface mount devices</summary>
  3703.    <g:image_link>https://leap.tardate.com/Electronics101/SMDPracticeBoards/assets/SMDPracticeBoards_build.jpg</g:image_link>
  3704.    <category term="SMD"/>
  3705.    <category term="CMOS"/>
  3706.    <category term="555 Timer"/>
  3707.  </entry>
  3708.  <entry>
  3709.    <id>https://leap.tardate.com/Electronics101/ClapSwitchKit/</id>
  3710.    <link href="https://leap.tardate.com/Electronics101/ClapSwitchKit/"/>
  3711.    <updated>2015-12-17T00:18:06Z</updated>
  3712.    <title>#170 ClapSwitchKit</title>
  3713.    <summary>build and analyse a simple clap switch circuit available as a kit</summary>
  3714.    <g:image_link>https://leap.tardate.com/Electronics101/ClapSwitchKit/assets/ClapSwitchKit_build.jpg</g:image_link>
  3715.    <category term="Oscillators"/>
  3716.    <category term="BJT"/>
  3717.    <category term="Logic Gates"/>
  3718.  </entry>
  3719.  <entry>
  3720.    <id>https://leap.tardate.com/playground/RGBLedModule/</id>
  3721.    <link href="https://leap.tardate.com/playground/RGBLedModule/"/>
  3722.    <updated>2015-12-13T14:23:03Z</updated>
  3723.    <title>#169 RGBLedModule</title>
  3724.    <summary>demo an RGB LED module</summary>
  3725.    <g:image_link>https://leap.tardate.com/playground/RGBLedModule/assets/RGBLedModule_build.jpg</g:image_link>
  3726.    <category term="LED"/>
  3727.    <category term="Arduino"/>
  3728.  </entry>
  3729.  <entry>
  3730.    <id>https://leap.tardate.com/playground/CurrentSensorModule/</id>
  3731.    <link href="https://leap.tardate.com/playground/CurrentSensorModule/"/>
  3732.    <updated>2015-12-13T14:23:03Z</updated>
  3733.    <title>#168 CurrentSensorModule</title>
  3734.    <summary>test an ACS712 current sensor module with display on a 5110 LCD</summary>
  3735.    <g:image_link>https://leap.tardate.com/playground/CurrentSensorModule/assets/CurrentSensorModule_build.jpg</g:image_link>
  3736.    <category term="Sensors"/>
  3737.    <category term="Arduino"/>
  3738.  </entry>
  3739.  <entry>
  3740.    <id>https://leap.tardate.com/playground/VoltageSensorModule/</id>
  3741.    <link href="https://leap.tardate.com/playground/VoltageSensorModule/"/>
  3742.    <updated>2015-12-12T16:06:04Z</updated>
  3743.    <title>#167 VoltageSensorModule</title>
  3744.    <summary>test a 25V voltage sensor module with display on a 5110 LCD</summary>
  3745.    <g:image_link>https://leap.tardate.com/playground/VoltageSensorModule/assets/VoltageSensorModule_build.jpg</g:image_link>
  3746.    <category term="Sensors"/>
  3747.    <category term="Arduino"/>
  3748.  </entry>
  3749.  <entry>
  3750.    <id>https://leap.tardate.com/playground/DS3231RTC/TimeDemo/</id>
  3751.    <link href="https://leap.tardate.com/playground/DS3231RTC/TimeDemo/"/>
  3752.    <updated>2015-12-12T16:06:04Z</updated>
  3753.    <title>#166 DS3231RTC/TimeDemo</title>
  3754.    <summary>prints the system time synced from the RTC to the serial output</summary>
  3755.    <g:image_link>https://leap.tardate.com/playground/DS3231RTC/TimeDemo/assets/TimeDemo_build.jpg</g:image_link>
  3756.    <category term="RTC"/>
  3757.    <category term="Arduino"/>
  3758.  </entry>
  3759.  <entry>
  3760.    <id>https://leap.tardate.com/Electronics101/Power2662Inverter/</id>
  3761.    <link href="https://leap.tardate.com/Electronics101/Power2662Inverter/"/>
  3762.    <updated>2015-11-25T13:55:11Z</updated>
  3763.    <title>#165 Power2662Inverter</title>
  3764.    <summary>test a negative 5V power supply using the LM2662 Switched Capacitor Voltage Converter</summary>
  3765.    <g:image_link>https://leap.tardate.com/Electronics101/Power2662Inverter/assets/Power2662Inverter_build.jpg</g:image_link>
  3766.    <category term="Power"/>
  3767.  </entry>
  3768.  <entry>
  3769.    <id>https://leap.tardate.com/Electronics101/WatsonLedRing/</id>
  3770.    <link href="https://leap.tardate.com/Electronics101/WatsonLedRing/"/>
  3771.    <updated>2019-06-02T04:21:51Z</updated>
  3772.    <title>#164 Watson LED Ring</title>
  3773.    <summary>test a Watson 3-LED Ring oscillator</summary>
  3774.    <g:image_link>https://leap.tardate.com/Electronics101/WatsonLedRing/assets/WatsonLedRing_build.jpg</g:image_link>
  3775.    <category term="Oscillators"/>
  3776.  </entry>
  3777.  <entry>
  3778.    <id>https://leap.tardate.com/Electronics101/VariableSawtoothGenerator/</id>
  3779.    <link href="https://leap.tardate.com/Electronics101/VariableSawtoothGenerator/"/>
  3780.    <updated>2015-11-22T10:45:17Z</updated>
  3781.    <title>#163 VariableSawtoothGenerator</title>
  3782.    <summary>test a variable-geometry, fixed-amplitude sawtooth wave generator circuit</summary>
  3783.    <g:image_link>https://leap.tardate.com/Electronics101/VariableSawtoothGenerator/assets/VariableSawtoothGenerator_build.jpg</g:image_link>
  3784.    <category term="OpAmp"/>
  3785.    <category term="Oscillators"/>
  3786.  </entry>
  3787.  <entry>
  3788.    <id>https://leap.tardate.com/Electronics101/BoostBuckConverterModule/</id>
  3789.    <link href="https://leap.tardate.com/Electronics101/BoostBuckConverterModule/"/>
  3790.    <updated>2015-10-31T11:34:39Z</updated>
  3791.    <title>#162 BoostBuckConverterModule</title>
  3792.    <summary>quick test of an LM2577S/LM2596S Boost/Buck Converter Module</summary>
  3793.    <g:image_link>https://leap.tardate.com/Electronics101/BoostBuckConverterModule/assets/BoostBuckConverterModule_build.jpg</g:image_link>
  3794.    <category term="Power"/>
  3795.  </entry>
  3796.  <entry>
  3797.    <id>https://leap.tardate.com/Electronics101/ML741/NonInvertingAmplifier/</id>
  3798.    <link href="https://leap.tardate.com/Electronics101/ML741/NonInvertingAmplifier/"/>
  3799.    <updated>2015-10-27T11:30:50Z</updated>
  3800.    <title>#161 ML741/NonInvertingAmplifier</title>
  3801.    <summary>test a non-inverting amplifier circuit using the ML741 discrete component opamp</summary>
  3802.    <g:image_link>https://leap.tardate.com/Electronics101/ML741/NonInvertingAmplifier/assets/NonInvertingAmplifier_build.jpg</g:image_link>
  3803.    <category term="OpAmp"/>
  3804.  </entry>
  3805.  <entry>
  3806.    <id>https://leap.tardate.com/Electronics101/LM324/SplitterBuffer/</id>
  3807.    <link href="https://leap.tardate.com/Electronics101/LM324/SplitterBuffer/"/>
  3808.    <updated>2015-10-27T11:30:50Z</updated>
  3809.    <title>#160 LM324/SplitterBuffer</title>
  3810.    <summary>demonstrate load-independance of an LM324 buffer and signal splitter</summary>
  3811.    <g:image_link>https://leap.tardate.com/Electronics101/LM324/SplitterBuffer/assets/SplitterBuffer_build.jpg</g:image_link>
  3812.    <category term="OpAmp"/>
  3813.  </entry>
  3814.  <entry>
  3815.    <id>https://leap.tardate.com/Electronics101/ML741/InvertingAmplifier/</id>
  3816.    <link href="https://leap.tardate.com/Electronics101/ML741/InvertingAmplifier/"/>
  3817.    <updated>2015-10-27T11:30:50Z</updated>
  3818.    <title>#159 ML741/InvertingAmplifier</title>
  3819.    <summary>test an inverting amplifier circuit using the ML741 discrete component opamp</summary>
  3820.    <g:image_link>https://leap.tardate.com/Electronics101/ML741/InvertingAmplifier/assets/InvertingAmplifier_build.jpg</g:image_link>
  3821.    <category term="OpAmp"/>
  3822.  </entry>
  3823.  <entry>
  3824.    <id>https://leap.tardate.com/Electronics101/ML741/Inverter/</id>
  3825.    <link href="https://leap.tardate.com/Electronics101/ML741/Inverter/"/>
  3826.    <updated>2015-10-24T06:01:57Z</updated>
  3827.    <title>#158 ML741/Inverter</title>
  3828.    <summary>test an inverter circuit using the ML741 discrete component opamp</summary>
  3829.    <g:image_link>https://leap.tardate.com/Electronics101/ML741/Inverter/assets/Inverter_build.jpg</g:image_link>
  3830.    <category term="OpAmp"/>
  3831.  </entry>
  3832.  <entry>
  3833.    <id>https://leap.tardate.com/Electronics101/ML741/VoltageFollower/</id>
  3834.    <link href="https://leap.tardate.com/Electronics101/ML741/VoltageFollower/"/>
  3835.    <updated>2015-10-22T17:06:59Z</updated>
  3836.    <title>#157 ML741/VoltageFollower</title>
  3837.    <summary>test a voltage follower/buffer circuit with the ML741 discrete component opamp</summary>
  3838.    <g:image_link>https://leap.tardate.com/Electronics101/ML741/VoltageFollower/assets/VoltageFollower_build.jpg</g:image_link>
  3839.    <category term="OpAmp"/>
  3840.  </entry>
  3841.  <entry>
  3842.    <id>https://leap.tardate.com/Equipment/MSO5074FG_unboxing/</id>
  3843.    <link href="https://leap.tardate.com/Equipment/MSO5074FG_unboxing/"/>
  3844.    <updated>2016-10-22T15:12:00Z</updated>
  3845.    <title>#156 MSO5074FG_unboxing</title>
  3846.    <summary>unboxing and first tests of a Hantek MSO5074FG oscilloscope</summary>
  3847.    <g:image_link>https://leap.tardate.com/Equipment/MSO5074FG_unboxing/assets/MSO5074FG_unboxing_build.jpg</g:image_link>
  3848.    <category term="Tools"/>
  3849.    <category term="Test Equipment"/>
  3850.    <category term="Oscilloscope"/>
  3851.  </entry>
  3852.  <entry>
  3853.    <id>https://leap.tardate.com/ESP8266/SerialTest/ruby/</id>
  3854.    <link href="https://leap.tardate.com/ESP8266/SerialTest/ruby/"/>
  3855.    <updated>2017-09-24T13:47:05Z</updated>
  3856.    <title>#155 ESP8266/SerialTest/ruby</title>
  3857.    <summary>exercising ESP8266 serial communications with Ruby</summary>
  3858.    <g:image_link>https://leap.tardate.com/ESP8266/SerialTest/ruby/assets/ruby_build.jpg</g:image_link>
  3859.    <category term="ESP8266"/>
  3860.    <category term="ruby"/>
  3861.  </entry>
  3862.  <entry>
  3863.    <id>https://leap.tardate.com/ESP8266/SerialTest/</id>
  3864.    <link href="https://leap.tardate.com/ESP8266/SerialTest/"/>
  3865.    <updated>2017-09-24T13:47:05Z</updated>
  3866.    <title>#154 ESP8266/SerialTest</title>
  3867.    <summary>first test of an ESP8266 module - serial communication to the SoC</summary>
  3868.    <g:image_link>https://leap.tardate.com/ESP8266/SerialTest/assets/SerialTest_build.jpg</g:image_link>
  3869.    <category term="ESP8266"/>
  3870.  </entry>
  3871.  <entry>
  3872.    <id>https://leap.tardate.com/Electronics101/PowerAMS1117/</id>
  3873.    <link href="https://leap.tardate.com/Electronics101/PowerAMS1117/"/>
  3874.    <updated>2015-10-17T16:36:54Z</updated>
  3875.    <title>#153 PowerAMS1117</title>
  3876.    <summary>test an AMS1117 3.3V linear regulator</summary>
  3877.    <g:image_link>https://leap.tardate.com/Electronics101/PowerAMS1117/assets/PowerAMS1117_build.jpg</g:image_link>
  3878.    <category term="Power"/>
  3879.  </entry>
  3880.  <entry>
  3881.    <id>https://leap.tardate.com/Electronics101/PowerLD1117/</id>
  3882.    <link href="https://leap.tardate.com/Electronics101/PowerLD1117/"/>
  3883.    <updated>2015-10-17T16:36:54Z</updated>
  3884.    <title>#152 PowerLD1117</title>
  3885.    <summary>test an LD1117 3.3V linear regulator</summary>
  3886.    <g:image_link>https://leap.tardate.com/Electronics101/PowerLD1117/assets/PowerLD1117_build.jpg</g:image_link>
  3887.    <category term="Power"/>
  3888.  </entry>
  3889.  <entry>
  3890.    <id>https://leap.tardate.com/Electronics101/ML741/Comparator/</id>
  3891.    <link href="https://leap.tardate.com/Electronics101/ML741/Comparator/"/>
  3892.    <updated>2015-10-11T20:12:10Z</updated>
  3893.    <title>#151 ML741/Comparator</title>
  3894.    <summary>test a comparator circuit with the ML741 discrete component opamp</summary>
  3895.    <g:image_link>https://leap.tardate.com/Electronics101/ML741/Comparator/assets/Comparator_build.jpg</g:image_link>
  3896.    <category term="OpAmp"/>
  3897.  </entry>
  3898.  <entry>
  3899.    <id>https://leap.tardate.com/Electronics101/ML741/</id>
  3900.    <link href="https://leap.tardate.com/Electronics101/ML741/"/>
  3901.    <updated>2015-10-11T20:12:10Z</updated>
  3902.    <title>#150 ML741</title>
  3903.    <summary>an LM741-style OpAmp built with discrete components</summary>
  3904.    <g:image_link>https://leap.tardate.com/Electronics101/ML741/assets/ML741_build.jpg</g:image_link>
  3905.    <category term="OpAmp"/>
  3906.  </entry>
  3907.  <entry>
  3908.    <id>https://leap.tardate.com/playground/Lcd5110/JuliansU8glibDemo/</id>
  3909.    <link href="https://leap.tardate.com/playground/Lcd5110/JuliansU8glibDemo/"/>
  3910.    <updated>2015-10-04T11:28:16Z</updated>
  3911.    <title>#149 Lcd5110/JuliansU8glibDemo</title>
  3912.    <summary>quick test drive of Julian Ilett's 5110 LCD demo with the u8glib library</summary>
  3913.    <g:image_link>https://leap.tardate.com/playground/Lcd5110/JuliansU8glibDemo/assets/JuliansU8glibDemo_build.jpg</g:image_link>
  3914.    <category term="LCD"/>
  3915.    <category term="Arduino"/>
  3916.  </entry>
  3917.  <entry>
  3918.    <id>https://leap.tardate.com/playground/AD9833/BasicDemoCycle/</id>
  3919.    <link href="https://leap.tardate.com/playground/AD9833/BasicDemoCycle/"/>
  3920.    <updated>2015-10-03T17:01:45Z</updated>
  3921.    <title>#148 AD9833/BasicDemoCycle</title>
  3922.    <summary>run a basic waveform demo with an AD9833 module</summary>
  3923.    <g:image_link>https://leap.tardate.com/playground/AD9833/BasicDemoCycle/assets/BasicDemoCycle_build.jpg</g:image_link>
  3924.    <category term="Arduino"/>
  3925.    <category term="Oscillators"/>
  3926.  </entry>
  3927.  <entry>
  3928.    <id>https://leap.tardate.com/Electronics101/555Timer/VoltageDoublerChargePump/</id>
  3929.    <link href="https://leap.tardate.com/Electronics101/555Timer/VoltageDoublerChargePump/"/>
  3930.    <updated>2015-10-01T16:31:15Z</updated>
  3931.    <title>#147 VoltageDoublerChargePump</title>
  3932.    <summary>test a voltage-doubling charge pump circuit based on a 555 timer</summary>
  3933.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/VoltageDoublerChargePump/assets/VoltageDoublerChargePump_build.jpg</g:image_link>
  3934.    <category term="555 Timer"/>
  3935.    <category term="Power"/>
  3936.  </entry>
  3937.  <entry>
  3938.    <id>https://leap.tardate.com/Electronics101/555Timer/InvertingChargePump/</id>
  3939.    <link href="https://leap.tardate.com/Electronics101/555Timer/InvertingChargePump/"/>
  3940.    <updated>2015-09-30T18:21:34Z</updated>
  3941.    <title>#146 InvertingChargePump</title>
  3942.    <summary>test an inverting charge pump circuit based on a 555 timer</summary>
  3943.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/InvertingChargePump/assets/InvertingChargePump_build.jpg</g:image_link>
  3944.    <category term="555 Timer"/>
  3945.    <category term="Power"/>
  3946.  </entry>
  3947.  <entry>
  3948.    <id>https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/</id>
  3949.    <link href="https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/"/>
  3950.    <updated>2015-09-22T00:34:41Z</updated>
  3951.    <title>#145 Variable Duty-Cycle 555 Timer</title>
  3952.    <summary>a 555 oscillator circuit that allows easy manual duty cycle adjustment while minimising the change to frequency</summary>
  3953.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/VariableDutyCycle/assets/VariableDutyCycle_build.jpg</g:image_link>
  3954.    <category term="555 Timer"/>
  3955.    <category term="Oscillators"/>
  3956.  </entry>
  3957.  <entry>
  3958.    <id>https://leap.tardate.com/Electronics101/RingOscillator/</id>
  3959.    <link href="https://leap.tardate.com/Electronics101/RingOscillator/"/>
  3960.    <updated>2019-03-08T06:55:15Z</updated>
  3961.    <title>#144 RingOscillator</title>
  3962.    <summary>test a ring oscillator built with a 74LS14 Inverter chip</summary>
  3963.    <g:image_link>https://leap.tardate.com/Electronics101/RingOscillator/assets/RingOscillator_build.jpg</g:image_link>
  3964.    <category term="CMOS/TTL"/>
  3965.    <category term="Oscillators"/>
  3966.  </entry>
  3967.  <entry>
  3968.    <id>https://leap.tardate.com/Radio/AM/OpAmpTransmitter/</id>
  3969.    <link href="https://leap.tardate.com/Radio/AM/OpAmpTransmitter/"/>
  3970.    <updated>2019-04-05T17:26:14Z</updated>
  3971.    <title>#143 OpAmp AM Transmitter</title>
  3972.    <summary>simple AM transmitter with OpAmp carrier/mixer</summary>
  3973.    <g:image_link>https://leap.tardate.com/Radio/AM/OpAmpTransmitter/assets/OpAmpTransmitter_build.jpg</g:image_link>
  3974.    <category term="Radio"/>
  3975.    <category term="OpAmp"/>
  3976.  </entry>
  3977.  <entry>
  3978.    <id>https://leap.tardate.com/Electronics101/HighFrequencyOpAmpOscillators/</id>
  3979.    <link href="https://leap.tardate.com/Electronics101/HighFrequencyOpAmpOscillators/"/>
  3980.    <updated>2015-09-13T06:21:44Z</updated>
  3981.    <title>#142 High-frequency OpAmp Oscillators</title>
  3982.    <summary>how fast can you push an Op-Amp oscillator?</summary>
  3983.    <g:image_link>https://leap.tardate.com/Electronics101/HighFrequencyOpAmpOscillators/assets/HighFrequencyOpAmpOscillators_build.jpg</g:image_link>
  3984.    <category term="OpAmp"/>
  3985.    <category term="Oscillators"/>
  3986.  </entry>
  3987.  <entry>
  3988.    <id>https://leap.tardate.com/Electronics101/CrystalTester/</id>
  3989.    <link href="https://leap.tardate.com/Electronics101/CrystalTester/"/>
  3990.    <updated>2015-09-07T16:39:38Z</updated>
  3991.    <title>#141 CrystalTester</title>
  3992.    <summary>a Colpitts Oscillator circuit for testing crystal oscillators with a frequency counter</summary>
  3993.    <g:image_link>https://leap.tardate.com/Electronics101/CrystalTester/assets/CrystalTester_build.jpg</g:image_link>
  3994.    <category term="Radio"/>
  3995.    <category term="Oscillators"/>
  3996.  </entry>
  3997.  <entry>
  3998.    <id>https://leap.tardate.com/Electronics101/AudioEffects/ZenerModeEffects/</id>
  3999.    <link href="https://leap.tardate.com/Electronics101/AudioEffects/ZenerModeEffects/"/>
  4000.    <updated>2019-04-25T16:41:16Z</updated>
  4001.    <title>#140 BJT Zener-Mode Effects</title>
  4002.    <summary>playing around with some zener-mode sound effects</summary>
  4003.    <g:image_link>https://leap.tardate.com/Electronics101/AudioEffects/ZenerModeEffects/assets/ZenerModeEffects_build.jpg</g:image_link>
  4004.    <category term="Audio"/>
  4005.    <category term="BJT"/>
  4006.    <category term="Zener"/>
  4007.    <category term="Oscillators"/>
  4008.  </entry>
  4009.  <entry>
  4010.    <id>https://leap.tardate.com/playground/AnalogComparator/</id>
  4011.    <link href="https://leap.tardate.com/playground/AnalogComparator/"/>
  4012.    <updated>2015-09-03T14:52:16Z</updated>
  4013.    <title>#139 AnalogComparator</title>
  4014.    <summary>test the Atmega328 built-in analog comparator</summary>
  4015.    <g:image_link>https://leap.tardate.com/playground/AnalogComparator/assets/AnalogComparator_build.jpg</g:image_link>
  4016.    <category term="Arduino"/>
  4017.    <category term="Sensor"/>
  4018.    <category term="OpAmp"/>
  4019.  </entry>
  4020.  <entry>
  4021.    <id>https://leap.tardate.com/Electronics101/BJT/Monostable/</id>
  4022.    <link href="https://leap.tardate.com/Electronics101/BJT/Monostable/"/>
  4023.    <updated>2018-02-13T01:35:19Z</updated>
  4024.    <title>#138 BJT Monostable</title>
  4025.    <summary>test a 2-transistor monostable multivibrator</summary>
  4026.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/Monostable/assets/Monostable_build.jpg</g:image_link>
  4027.    <category term="BJT"/>
  4028.    <category term="RC"/>
  4029.  </entry>
  4030.  <entry>
  4031.    <id>https://leap.tardate.com/Electronics101/ToroidJouleThief/</id>
  4032.    <link href="https://leap.tardate.com/Electronics101/ToroidJouleThief/"/>
  4033.    <updated>2015-08-31T11:27:06Z</updated>
  4034.    <title>#137 ToroidJouleThief</title>
  4035.    <summary>test a &quot;joule thief&quot; circuit based on a ferrite toroid</summary>
  4036.    <g:image_link>https://leap.tardate.com/Electronics101/ToroidJouleThief/assets/ToroidJouleThief_build.jpg</g:image_link>
  4037.    <category term="Power"/>
  4038.    <category term="RL"/>
  4039.    <category term="Oscillators"/>
  4040.  </entry>
  4041.  <entry>
  4042.    <id>https://leap.tardate.com/playground/CounterModule/</id>
  4043.    <link href="https://leap.tardate.com/playground/CounterModule/"/>
  4044.    <updated>2015-08-23T11:12:41Z</updated>
  4045.    <title>#136 CounterModule</title>
  4046.    <summary>a general-purpose CD4017 counter module</summary>
  4047.    <g:image_link>https://leap.tardate.com/playground/CounterModule/assets/CounterModule_build.jpg</g:image_link>
  4048.    <category term="CMOS"/>
  4049.    <category term="Arduino"/>
  4050.  </entry>
  4051.  <entry>
  4052.    <id>https://leap.tardate.com/Electronics101/555Timer/TouchSwitch/</id>
  4053.    <link href="https://leap.tardate.com/Electronics101/555Timer/TouchSwitch/"/>
  4054.    <updated>2015-08-17T16:33:53Z</updated>
  4055.    <title>#135 TouchSwitch/555</title>
  4056.    <summary>test a touch switch circuit based on a 555 timer</summary>
  4057.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/TouchSwitch/assets/TouchSwitch_build.jpg</g:image_link>
  4058.    <category term="555 Timer"/>
  4059.  </entry>
  4060.  <entry>
  4061.    <id>https://leap.tardate.com/Electronics101/BidirectionalLevelShifterModule/</id>
  4062.    <link href="https://leap.tardate.com/Electronics101/BidirectionalLevelShifterModule/"/>
  4063.    <updated>2015-08-16T15:59:23Z</updated>
  4064.    <title>#134 BidirectionalLevelShifterModule</title>
  4065.    <summary>test a bi-directional 5/3.3V level shifter module</summary>
  4066.    <g:image_link>https://leap.tardate.com/Electronics101/BidirectionalLevelShifterModule/assets/BidirectionalLevelShifterModule_build.jpg</g:image_link>
  4067.    <category term="FET"/>
  4068.  </entry>
  4069.  <entry>
  4070.    <id>https://leap.tardate.com/Electronics101/BidirectionalLevelShifter/</id>
  4071.    <link href="https://leap.tardate.com/Electronics101/BidirectionalLevelShifter/"/>
  4072.    <updated>2015-08-16T15:59:23Z</updated>
  4073.    <title>#133 BidirectionalLevelShifter</title>
  4074.    <summary>test a basic bi-directional 5/3.3V level shifter circuit</summary>
  4075.    <g:image_link>https://leap.tardate.com/Electronics101/BidirectionalLevelShifter/assets/BidirectionalLevelShifter_build.jpg</g:image_link>
  4076.    <category term="FET"/>
  4077.  </entry>
  4078.  <entry>
  4079.    <id>https://leap.tardate.com/Electronics101/555Timer/AMTransmitter/</id>
  4080.    <link href="https://leap.tardate.com/Electronics101/555Timer/AMTransmitter/"/>
  4081.    <updated>2015-08-16T10:56:02Z</updated>
  4082.    <title>#132 AMTransmitter/555</title>
  4083.    <summary>a simple 555-based AM transmitter</summary>
  4084.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/AMTransmitter/assets/AMTransmitter_build.jpg</g:image_link>
  4085.    <category term="Radio"/>
  4086.    <category term="555 Timer"/>
  4087.  </entry>
  4088.  <entry>
  4089.    <id>https://leap.tardate.com/Radio/AMFMRadioKit/</id>
  4090.    <link href="https://leap.tardate.com/Radio/AMFMRadioKit/"/>
  4091.    <updated>2019-04-28T05:53:05Z</updated>
  4092.    <title>#131 AM/FM Radio Kit</title>
  4093.    <summary>build notes for an AM/FM radio kit using the CD7642 AM, CD9088 FM and TDA2822 amp chips</summary>
  4094.    <g:image_link>https://leap.tardate.com/Radio/AMFMRadioKit/assets/AMFMRadioKit_build.jpg</g:image_link>
  4095.    <category term="Radio"/>
  4096.    <category term="AM"/>
  4097.    <category term="FM"/>
  4098.  </entry>
  4099.  <entry>
  4100.    <id>https://leap.tardate.com/Electronics101/DarlingtonTouchSwitch/</id>
  4101.    <link href="https://leap.tardate.com/Electronics101/DarlingtonTouchSwitch/"/>
  4102.    <updated>2015-08-15T10:31:15Z</updated>
  4103.    <title>#130 DarlingtonTouchSwitch</title>
  4104.    <summary>test a Darlington-pair touch switch</summary>
  4105.    <g:image_link>https://leap.tardate.com/Electronics101/DarlingtonTouchSwitch/assets/DarlingtonTouchSwitch_build.jpg</g:image_link>
  4106.    <category term="Sensors"/>
  4107.    <category term="BJT"/>
  4108.  </entry>
  4109.  <entry>
  4110.    <id>https://leap.tardate.com/Electronics101/RelaxationJouleThief/</id>
  4111.    <link href="https://leap.tardate.com/Electronics101/RelaxationJouleThief/"/>
  4112.    <updated>2015-08-15T10:31:15Z</updated>
  4113.    <title>#129 RelaxationJouleThief</title>
  4114.    <summary>test a &quot;joule thief&quot; circuit based on a relaxation oscillator</summary>
  4115.    <g:image_link>https://leap.tardate.com/Electronics101/RelaxationJouleThief/assets/RelaxationJouleThief_build.jpg</g:image_link>
  4116.    <category term="Power"/>
  4117.    <category term="RLC"/>
  4118.    <category term="Oscillators"/>
  4119.  </entry>
  4120.  <entry>
  4121.    <id>https://leap.tardate.com/playground/ATtiny/TotalSleep/</id>
  4122.    <link href="https://leap.tardate.com/playground/ATtiny/TotalSleep/"/>
  4123.    <updated>2018-10-21T07:22:34Z</updated>
  4124.    <title>#128 ATtiny/TotalSleep</title>
  4125.    <summary>test a total power shutdown with an ATtiny85 processor on a breadboard</summary>
  4126.    <g:image_link>https://leap.tardate.com/playground/ATtiny/TotalSleep/assets/TotalSleep_build.jpg</g:image_link>
  4127.    <category term="Arduino"/>
  4128.    <category term="ATmel"/>
  4129.  </entry>
  4130.  <entry>
  4131.    <id>https://leap.tardate.com/playground/ATtiny/SleepMode/</id>
  4132.    <link href="https://leap.tardate.com/playground/ATtiny/SleepMode/"/>
  4133.    <updated>2018-10-21T07:22:34Z</updated>
  4134.    <title>#127 ATtiny/SleepMode</title>
  4135.    <summary>test sleep mode with an ATtiny85 processor on a breadboard</summary>
  4136.    <g:image_link>https://leap.tardate.com/playground/ATtiny/SleepMode/assets/SleepMode_build.jpg</g:image_link>
  4137.    <category term="Arduino"/>
  4138.    <category term="ATmel"/>
  4139.  </entry>
  4140.  <entry>
  4141.    <id>https://leap.tardate.com/playground/ATtiny/HardwareInterrupt/</id>
  4142.    <link href="https://leap.tardate.com/playground/ATtiny/HardwareInterrupt/"/>
  4143.    <updated>2018-10-21T07:22:34Z</updated>
  4144.    <title>#126 ATtiny/HardwareInterrupt</title>
  4145.    <summary>test hardware interrupts with an ATtiny85 processor on a breadboard</summary>
  4146.    <g:image_link>https://leap.tardate.com/playground/ATtiny/HardwareInterrupt/assets/HardwareInterrupt_build.jpg</g:image_link>
  4147.    <category term="Arduino"/>
  4148.    <category term="ATmel"/>
  4149.  </entry>
  4150.  <entry>
  4151.    <id>https://leap.tardate.com/Electronics101/VoiceLevelIndicatorKit/</id>
  4152.    <link href="https://leap.tardate.com/Electronics101/VoiceLevelIndicatorKit/"/>
  4153.    <updated>2015-08-08T07:58:28Z</updated>
  4154.    <title>#125 VoiceLevelIndicatorKit</title>
  4155.    <summary>build and investigate a commercially available &quot;3-band voice level indicator&quot; kit</summary>
  4156.    <g:image_link>https://leap.tardate.com/Electronics101/VoiceLevelIndicatorKit/assets/VoiceLevelIndicatorKit_build.jpg</g:image_link>
  4157.    <category term="LED"/>
  4158.    <category term="Kit"/>
  4159.  </entry>
  4160.  <entry>
  4161.    <id>https://leap.tardate.com/Electronics101/EMRDetection/RFDetectorProbe/</id>
  4162.    <link href="https://leap.tardate.com/Electronics101/EMRDetection/RFDetectorProbe/"/>
  4163.    <updated>2015-08-06T13:12:07Z</updated>
  4164.    <title>#124 RFDetectorProbe</title>
  4165.    <summary>a simple RF detector mounted in a pen</summary>
  4166.    <g:image_link>https://leap.tardate.com/Electronics101/EMRDetection/RFDetectorProbe/assets/RFDetectorProbe_build.jpg</g:image_link>
  4167.    <category term="Radio"/>
  4168.  </entry>
  4169.  <entry>
  4170.    <id>https://leap.tardate.com/Radio/AM/HX6B/</id>
  4171.    <link href="https://leap.tardate.com/Radio/AM/HX6B/"/>
  4172.    <updated>2019-03-18T15:30:49Z</updated>
  4173.    <title>#123 HX6B</title>
  4174.    <summary>build and analyse the HX-6B superheterodyne AM MW radio receiver kit</summary>
  4175.    <g:image_link>https://leap.tardate.com/Radio/AM/HX6B/assets/HX6B_build.jpg</g:image_link>
  4176.    <category term="Radio"/>
  4177.    <category term="AM"/>
  4178.  </entry>
  4179.  <entry>
  4180.    <id>https://leap.tardate.com/Electronics101/OpAmpTimer/</id>
  4181.    <link href="https://leap.tardate.com/Electronics101/OpAmpTimer/"/>
  4182.    <updated>2015-08-01T08:29:59Z</updated>
  4183.    <title>#122 OpAmpTimer</title>
  4184.    <summary>testing an OpAmp timer switch</summary>
  4185.    <g:image_link>https://leap.tardate.com/Electronics101/OpAmpTimer/assets/OpAmpTimer_build.jpg</g:image_link>
  4186.    <category term="OpAmp"/>
  4187.    <category term="Timer"/>
  4188.  </entry>
  4189.  <entry>
  4190.    <id>https://leap.tardate.com/Electronics101/PeakDetector/</id>
  4191.    <link href="https://leap.tardate.com/Electronics101/PeakDetector/"/>
  4192.    <updated>2015-08-01T08:29:59Z</updated>
  4193.    <title>#121 PeakDetector</title>
  4194.    <summary>test an OpAmp-based peak detector circuit</summary>
  4195.    <g:image_link>https://leap.tardate.com/Electronics101/PeakDetector/assets/PeakDetector_build.jpg</g:image_link>
  4196.    <category term="OpAmp"/>
  4197.    <category term="RC"/>
  4198.  </entry>
  4199.  <entry>
  4200.    <id>https://leap.tardate.com/Electronics101/SimplePeakDetector/</id>
  4201.    <link href="https://leap.tardate.com/Electronics101/SimplePeakDetector/"/>
  4202.    <updated>2015-08-01T08:29:59Z</updated>
  4203.    <title>#120 SimplePeakDetector</title>
  4204.    <summary>test the basic diode-RC peak detector circuit</summary>
  4205.    <g:image_link>https://leap.tardate.com/Electronics101/SimplePeakDetector/assets/SimplePeakDetector_build.jpg</g:image_link>
  4206.    <category term="RC"/>
  4207.  </entry>
  4208.  <entry>
  4209.    <id>https://leap.tardate.com/playground/RotaryEncoderModule/</id>
  4210.    <link href="https://leap.tardate.com/playground/RotaryEncoderModule/"/>
  4211.    <updated>2015-07-26T08:35:52Z</updated>
  4212.    <title>#119 RotaryEncoderModule</title>
  4213.    <summary>testing a Rotary Encoder module controlling an LED 8x8 display</summary>
  4214.    <g:image_link>https://leap.tardate.com/playground/RotaryEncoderModule/assets/RotaryEncoderModule_build.jpg</g:image_link>
  4215.    <category term="Sensor"/>
  4216.    <category term="8x8 LED"/>
  4217.    <category term="Arduino"/>
  4218.  </entry>
  4219.  <entry>
  4220.    <id>https://leap.tardate.com/playground/RotaryEncoderMethods/</id>
  4221.    <link href="https://leap.tardate.com/playground/RotaryEncoderMethods/"/>
  4222.    <updated>2015-07-26T08:35:52Z</updated>
  4223.    <title>#118 RotaryEncoderMethods</title>
  4224.    <summary>finding the best method for reading a rotary-encoder</summary>
  4225.    <g:image_link>https://leap.tardate.com/playground/RotaryEncoderMethods/assets/RotaryEncoderMethods_build.jpg</g:image_link>
  4226.    <category term="Sensor"/>
  4227.    <category term="Arduino"/>
  4228.  </entry>
  4229.  <entry>
  4230.    <id>https://leap.tardate.com/Kinetics/Solenoids/SolenoidDIY/</id>
  4231.    <link href="https://leap.tardate.com/Kinetics/Solenoids/SolenoidDIY/"/>
  4232.    <updated>2019-08-19T14:38:51Z</updated>
  4233.    <title>#117 Solenoid DIY</title>
  4234.    <summary>build and test a basic electromechanical solenoid</summary>
  4235.    <g:image_link>https://leap.tardate.com/Kinetics/Solenoids/SolenoidDIY/assets/SolenoidDIY_build.jpg</g:image_link>
  4236.    <category term="Solenoid"/>
  4237.    <category term="Arduino"/>
  4238.  </entry>
  4239.  <entry>
  4240.    <id>https://leap.tardate.com/Electronics101/SwitchNJFET/</id>
  4241.    <link href="https://leap.tardate.com/Electronics101/SwitchNJFET/"/>
  4242.    <updated>2015-07-14T13:59:06Z</updated>
  4243.    <title>#116 Switch - NJFET</title>
  4244.    <summary>switch an independent power source using an Arduino and n-channel JFET</summary>
  4245.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchNJFET/assets/SwitchNJFET_build.jpg</g:image_link>
  4246.    <category term="JFET"/>
  4247.    <category term="Arduino"/>
  4248.  </entry>
  4249.  <entry>
  4250.    <id>https://leap.tardate.com/playground/R2RDAC/</id>
  4251.    <link href="https://leap.tardate.com/playground/R2RDAC/"/>
  4252.    <updated>2015-07-11T09:36:53Z</updated>
  4253.    <title>#115 R2RDAC</title>
  4254.    <summary>build and test a 16-bit R2R-ladder digital to analog converter with shift register interface</summary>
  4255.    <g:image_link>https://leap.tardate.com/playground/R2RDAC/assets/R2RDAC_build.jpg</g:image_link>
  4256.    <category term="Arduino"/>
  4257.  </entry>
  4258.  <entry>
  4259.    <id>https://leap.tardate.com/Electronics101/NORGateOscillator/</id>
  4260.    <link href="https://leap.tardate.com/Electronics101/NORGateOscillator/"/>
  4261.    <updated>2015-07-11T09:36:53Z</updated>
  4262.    <title>#114 NORGateOscillator</title>
  4263.    <summary>test a low-speed square wave oscillator using NOR gates</summary>
  4264.    <g:image_link>https://leap.tardate.com/Electronics101/NORGateOscillator/assets/NORGateOscillator_build.jpg</g:image_link>
  4265.    <category term="CMOS/TTL"/>
  4266.    <category term="Oscillators"/>
  4267.    <category term="Arduino"/>
  4268.  </entry>
  4269.  <entry>
  4270.    <id>https://leap.tardate.com/Electronics101/TTLBufferDriver/</id>
  4271.    <link href="https://leap.tardate.com/Electronics101/TTLBufferDriver/"/>
  4272.    <updated>2015-07-11T09:36:53Z</updated>
  4273.    <title>#113 TTLBufferDriver</title>
  4274.    <summary>using an OpAmp as a final buffer stage for TTL or similar circuits</summary>
  4275.    <g:image_link>https://leap.tardate.com/Electronics101/TTLBufferDriver/assets/TTLBufferDriver_build.jpg</g:image_link>
  4276.    <category term="OpAmp"/>
  4277.    <category term="TTL"/>
  4278.  </entry>
  4279.  <entry>
  4280.    <id>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/OR/</id>
  4281.    <link href="https://leap.tardate.com/Electronics101/ResistorTransistorLogic/OR/"/>
  4282.    <updated>2015-07-06T10:56:17Z</updated>
  4283.    <title>#112 ResistorTransistorLogic/OR</title>
  4284.    <summary>test the basic resistor-transistor logic OR gate</summary>
  4285.    <g:image_link>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/OR/assets/OR_build.jpg</g:image_link>
  4286.    <category term="BJT"/>
  4287.    <category term="RTL"/>
  4288.    <category term="Logic Gates"/>
  4289.  </entry>
  4290.  <entry>
  4291.    <id>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NOR/</id>
  4292.    <link href="https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NOR/"/>
  4293.    <updated>2015-07-06T10:56:17Z</updated>
  4294.    <title>#111 ResistorTransistorLogic/NOR</title>
  4295.    <summary>test the basic resistor-transistor logic NOR gate </summary>
  4296.    <g:image_link>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NOR/assets/NOR_build.jpg</g:image_link>
  4297.    <category term="BJT"/>
  4298.    <category term="RTL"/>
  4299.    <category term="Logic Gates"/>
  4300.  </entry>
  4301.  <entry>
  4302.    <id>https://leap.tardate.com/Electronics101/DiodeLogic/AND/</id>
  4303.    <link href="https://leap.tardate.com/Electronics101/DiodeLogic/AND/"/>
  4304.    <updated>2015-07-06T10:56:17Z</updated>
  4305.    <title>#110 DiodeLogic/AND</title>
  4306.    <summary>test the basic diode-logic AND gate</summary>
  4307.    <g:image_link>https://leap.tardate.com/Electronics101/DiodeLogic/AND/assets/AND_build.jpg</g:image_link>
  4308.    <category term="Diode"/>
  4309.    <category term="Logic Gates"/>
  4310.  </entry>
  4311.  <entry>
  4312.    <id>https://leap.tardate.com/Electronics101/DiodeLogic/OR/</id>
  4313.    <link href="https://leap.tardate.com/Electronics101/DiodeLogic/OR/"/>
  4314.    <updated>2015-07-06T10:56:17Z</updated>
  4315.    <title>#109 DiodeLogic/OR</title>
  4316.    <summary>test the basic diode-logic OR gate</summary>
  4317.    <g:image_link>https://leap.tardate.com/Electronics101/DiodeLogic/OR/assets/OR_build.jpg</g:image_link>
  4318.    <category term="Diode"/>
  4319.    <category term="Logic Gates"/>
  4320.  </entry>
  4321.  <entry>
  4322.    <id>https://leap.tardate.com/playground/RingCounterController/</id>
  4323.    <link href="https://leap.tardate.com/playground/RingCounterController/"/>
  4324.    <updated>2015-07-06T10:56:17Z</updated>
  4325.    <title>#108 RingCounterController</title>
  4326.    <summary>control the classic CD4017 walking-ring counter with an Arduino</summary>
  4327.    <g:image_link>https://leap.tardate.com/playground/RingCounterController/assets/RingCounterController_build.jpg</g:image_link>
  4328.    <category term="CMOS"/>
  4329.    <category term="Arduino"/>
  4330.  </entry>
  4331.  <entry>
  4332.    <id>https://leap.tardate.com/Electronics101/RingCounter/</id>
  4333.    <link href="https://leap.tardate.com/Electronics101/RingCounter/"/>
  4334.    <updated>2015-07-06T10:56:17Z</updated>
  4335.    <title>#107 RingCounter</title>
  4336.    <summary>test the classic CD4017 walking-ring counter</summary>
  4337.    <g:image_link>https://leap.tardate.com/Electronics101/RingCounter/assets/RingCounter_build.jpg</g:image_link>
  4338.    <category term="CMOS"/>
  4339.    <category term="555 Timer"/>
  4340.  </entry>
  4341.  <entry>
  4342.    <id>https://leap.tardate.com/Electronics101/SwitchPFET/</id>
  4343.    <link href="https://leap.tardate.com/Electronics101/SwitchPFET/"/>
  4344.    <updated>2015-07-06T10:56:17Z</updated>
  4345.    <title>#106 Switch - PFET</title>
  4346.    <summary>small-signal p-channel MOSFET switch with turn-on delay</summary>
  4347.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchPFET/assets/SwitchPFET_build.jpg</g:image_link>
  4348.    <category term="MOSFET"/>
  4349.  </entry>
  4350.  <entry>
  4351.    <id>https://leap.tardate.com/Electronics101/BJT/SawTooth/</id>
  4352.    <link href="https://leap.tardate.com/Electronics101/BJT/SawTooth/"/>
  4353.    <updated>2018-01-26T03:08:43Z</updated>
  4354.    <title>#105 BJT SawTooth</title>
  4355.    <summary>testing a simple BJT saw-tooth oscillator</summary>
  4356.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/SawTooth/assets/SawTooth_build.jpg</g:image_link>
  4357.    <category term="BJT"/>
  4358.    <category term="Oscillators"/>
  4359.  </entry>
  4360.  <entry>
  4361.    <id>https://leap.tardate.com/Electronics101/AudioAmps/Ruby/</id>
  4362.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/Ruby/"/>
  4363.    <updated>2015-07-26T08:35:52Z</updated>
  4364.    <title>#104 Ruby</title>
  4365.    <summary>a version of the runoffgroove Ruby LM386 guitar amp</summary>
  4366.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/Ruby/assets/Ruby_build.jpg</g:image_link>
  4367.    <category term="OpAmp"/>
  4368.    <category term="Audio"/>
  4369.  </entry>
  4370.  <entry>
  4371.    <id>https://leap.tardate.com/playground/LED8x8/LedControlDemo/</id>
  4372.    <link href="https://leap.tardate.com/playground/LED8x8/LedControlDemo/"/>
  4373.    <updated>2019-05-05T11:19:13Z</updated>
  4374.    <title>#103  8x8 LED Matrix LedControl</title>
  4375.    <summary>test driving and LED matrix with the LedControl library</summary>
  4376.    <g:image_link>https://leap.tardate.com/playground/LED8x8/LedControlDemo/assets/LedControlDemo_build.jpg</g:image_link>
  4377.    <category term="8x8 LED"/>
  4378.    <category term="Arduino"/>
  4379.  </entry>
  4380.  <entry>
  4381.    <id>https://leap.tardate.com/playground/SolenoidControl/</id>
  4382.    <link href="https://leap.tardate.com/playground/SolenoidControl/"/>
  4383.    <updated>2015-06-24T13:12:05Z</updated>
  4384.    <title>#102 SolenoidControl</title>
  4385.    <summary>controlling a mini solenoid with an Arduino</summary>
  4386.    <g:image_link>https://leap.tardate.com/playground/SolenoidControl/assets/SolenoidControl_build.jpg</g:image_link>
  4387.    <category term="Solenoid"/>
  4388.    <category term="Arduino"/>
  4389.  </entry>
  4390.  <entry>
  4391.    <id>https://leap.tardate.com/playground/LED8x8/MaxRawDemo/</id>
  4392.    <link href="https://leap.tardate.com/playground/LED8x8/MaxRawDemo/"/>
  4393.    <updated>2019-05-05T11:19:13Z</updated>
  4394.    <title>#101 8x8 LED Matrix Raw Drive</title>
  4395.    <summary>drive an 8x8 LED Matrix with a MAX7219 chip and raw SPI commands</summary>
  4396.    <g:image_link>https://leap.tardate.com/playground/LED8x8/MaxRawDemo/assets/MaxRawDemo_build.jpg</g:image_link>
  4397.    <category term="8x8 LED"/>
  4398.    <category term="Arduino"/>
  4399.  </entry>
  4400.  <entry>
  4401.    <id>https://leap.tardate.com/playground/OLED/ArdWinVaders/</id>
  4402.    <link href="https://leap.tardate.com/playground/OLED/ArdWinVaders/"/>
  4403.    <updated>2015-06-30T13:49:11Z</updated>
  4404.    <title>#100 ArdWinVaders</title>
  4405.    <summary>an Arduino &amp; OLED version of a classic game</summary>
  4406.    <g:image_link>https://leap.tardate.com/playground/OLED/ArdWinVaders/assets/ArdWinVaders_build.jpg</g:image_link>
  4407.    <category term="Arduino"/>
  4408.    <category term="OLED"/>
  4409.  </entry>
  4410.  <entry>
  4411.    <id>https://leap.tardate.com/playground/ATmegaISPShield/</id>
  4412.    <link href="https://leap.tardate.com/playground/ATmegaISPShield/"/>
  4413.    <updated>2015-06-15T11:47:35Z</updated>
  4414.    <title>#099 ATmegaISPShield</title>
  4415.    <summary>a DIY ATmega programming shield for using an Arduino as ISP </summary>
  4416.    <g:image_link>https://leap.tardate.com/playground/ATmegaISPShield/assets/ATmegaISPShield_build.jpg</g:image_link>
  4417.    <category term="Arduino"/>
  4418.    <category term="ATmel"/>
  4419.    <category term="ICSP"/>
  4420.  </entry>
  4421.  <entry>
  4422.    <id>https://leap.tardate.com/Electronics101/AudioAmps/GuitarHeadphoneAmp/</id>
  4423.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/GuitarHeadphoneAmp/"/>
  4424.    <updated>2015-06-15T11:47:35Z</updated>
  4425.    <title>#098 GuitarHeadphoneAmp</title>
  4426.    <summary>an LM386 fixed-gain guitar headphone amp</summary>
  4427.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/GuitarHeadphoneAmp/assets/GuitarHeadphoneAmp_build.jpg</g:image_link>
  4428.    <category term="OpAmp"/>
  4429.    <category term="Audio"/>
  4430.  </entry>
  4431.  <entry>
  4432.    <id>https://leap.tardate.com/Electronics101/AudioAmps/VolumeControlPowerAmp/</id>
  4433.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/VolumeControlPowerAmp/"/>
  4434.    <updated>2015-06-15T11:47:35Z</updated>
  4435.    <title>#097 VolumeControlPowerAmp</title>
  4436.    <summary>an LM386 fixed-gain audio power amp with volume control</summary>
  4437.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/VolumeControlPowerAmp/assets/VolumeControlPowerAmp_build.jpg</g:image_link>
  4438.    <category term="OpAmp"/>
  4439.    <category term="Audio"/>
  4440.  </entry>
  4441.  <entry>
  4442.    <id>https://leap.tardate.com/Electronics101/AudioAmps/Smokey/</id>
  4443.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/Smokey/"/>
  4444.    <updated>2015-06-15T11:47:35Z</updated>
  4445.    <title>#096 Smokey</title>
  4446.    <summary>quick build of a Smokey-like LM386 guitar power amp</summary>
  4447.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/Smokey/assets/Smokey_build.jpg</g:image_link>
  4448.    <category term="Amp"/>
  4449.    <category term="Audio"/>
  4450.  </entry>
  4451.  <entry>
  4452.    <id>https://leap.tardate.com/Electronics101/AudioAmps/LittleGem/</id>
  4453.    <link href="https://leap.tardate.com/Electronics101/AudioAmps/LittleGem/"/>
  4454.    <updated>2015-06-15T11:47:35Z</updated>
  4455.    <title>#095 LittleGem/A386</title>
  4456.    <summary>a basic Smokey-inspired LM386 guitar power amp</summary>
  4457.    <g:image_link>https://leap.tardate.com/Electronics101/AudioAmps/LittleGem/assets/LittleGem_build.jpg</g:image_link>
  4458.    <category term="OpAmp"/>
  4459.    <category term="Audio"/>
  4460.  </entry>
  4461.  <entry>
  4462.    <id>https://leap.tardate.com/Electronics101/BJT/LongTailPair/</id>
  4463.    <link href="https://leap.tardate.com/Electronics101/BJT/LongTailPair/"/>
  4464.    <updated>2018-02-13T01:35:19Z</updated>
  4465.    <title>#094 BJT LongTail Pair</title>
  4466.    <summary>test the basic BJT &quot;long-tail&quot; differential amplifier circuit</summary>
  4467.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/LongTailPair/assets/LongTailPair_build.jpg</g:image_link>
  4468.    <category term="BJT"/>
  4469.    <category term="OpAmp"/>
  4470.  </entry>
  4471.  <entry>
  4472.    <id>https://leap.tardate.com/Electronics101/BJT/CurrentSink/</id>
  4473.    <link href="https://leap.tardate.com/Electronics101/BJT/CurrentSink/"/>
  4474.    <updated>2018-01-22T06:17:45Z</updated>
  4475.    <title>#093 BJT CurrentSink</title>
  4476.    <summary>test a BJT constant current sink circuit</summary>
  4477.    <g:image_link>https://leap.tardate.com/Electronics101/BJT/CurrentSink/assets/CurrentSink_build.jpg</g:image_link>
  4478.    <category term="BJT"/>
  4479.    <category term="Power"/>
  4480.  </entry>
  4481.  <entry>
  4482.    <id>https://leap.tardate.com/Electronics101/Power317CC/</id>
  4483.    <link href="https://leap.tardate.com/Electronics101/Power317CC/"/>
  4484.    <updated>2015-06-09T17:18:46Z</updated>
  4485.    <title>#092 Power317CC</title>
  4486.    <summary>test a constant current power supply built with the LM317</summary>
  4487.    <g:image_link>https://leap.tardate.com/Electronics101/Power317CC/assets/Power317CC_build.jpg</g:image_link>
  4488.    <category term="Power"/>
  4489.  </entry>
  4490.  <entry>
  4491.    <id>https://leap.tardate.com/Electronics101/SwitchPJFET/</id>
  4492.    <link href="https://leap.tardate.com/Electronics101/SwitchPJFET/"/>
  4493.    <updated>2015-06-09T17:18:46Z</updated>
  4494.    <title>#091 Switch - PJFET</title>
  4495.    <summary>switch an independent power source using an Arduino and p-channel JFET</summary>
  4496.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchPJFET/assets/SwitchPJFET_build.jpg</g:image_link>
  4497.    <category term="JFET"/>
  4498.    <category term="Arduino"/>
  4499.  </entry>
  4500.  <entry>
  4501.    <id>https://leap.tardate.com/playground/PlotNValues/</id>
  4502.    <link href="https://leap.tardate.com/playground/PlotNValues/"/>
  4503.    <updated>2016-06-23T14:50:15Z</updated>
  4504.    <title>#090 PlotNValues</title>
  4505.    <summary>generic script to sample up to 6 analog inputs and stream the data to serial in ASCII format for plotting with Processing</summary>
  4506.    <g:image_link>https://leap.tardate.com/playground/PlotNValues/assets/PlotNValues_build.jpg</g:image_link>
  4507.    <category term="Arduino"/>
  4508.    <category term="Processing"/>
  4509.  </entry>
  4510.  <entry>
  4511.    <id>https://leap.tardate.com/Electronics101/BreatheLamp/</id>
  4512.    <link href="https://leap.tardate.com/Electronics101/BreatheLamp/"/>
  4513.    <updated>2015-06-04T13:47:47Z</updated>
  4514.    <title>#089 BreatheLamp</title>
  4515.    <summary>build and test a common LED visual effect circuit</summary>
  4516.    <g:image_link>https://leap.tardate.com/Electronics101/BreatheLamp/assets/BreatheLamp_build.jpg</g:image_link>
  4517.    <category term="OpAmp"/>
  4518.    <category term="LED"/>
  4519.  </entry>
  4520.  <entry>
  4521.    <id>https://leap.tardate.com/Electronics101/ElectronicClockKit/</id>
  4522.    <link href="https://leap.tardate.com/Electronics101/ElectronicClockKit/"/>
  4523.    <updated>2015-06-04T13:47:47Z</updated>
  4524.    <title>#088 ElectronicClockKit</title>
  4525.    <summary>build and investigate a commercially available &quot;electronic clock&quot; kit</summary>
  4526.    <g:image_link>https://leap.tardate.com/Electronics101/ElectronicClockKit/assets/ElectronicClockKit_build.jpg</g:image_link>
  4527.    <category term="LCD"/>
  4528.    <category term="Kit"/>
  4529.  </entry>
  4530.  <entry>
  4531.    <id>https://leap.tardate.com/playground/OLED/SSD1306BareBack/</id>
  4532.    <link href="https://leap.tardate.com/playground/OLED/SSD1306BareBack/"/>
  4533.    <updated>2015-06-04T13:47:48Z</updated>
  4534.    <title>#087 OLED/SSD1306BareBack</title>
  4535.    <summary>driving a monochrome 128x64 OLED Display with an Arduino and the raw command set</summary>
  4536.    <g:image_link>https://leap.tardate.com/playground/OLED/SSD1306BareBack/assets/SSD1306BareBack_build.jpg</g:image_link>
  4537.    <category term="OLED"/>
  4538.    <category term="Arduino"/>
  4539.  </entry>
  4540.  <entry>
  4541.    <id>https://leap.tardate.com/playground/OLED/SSD1306WithAdaFruitLibraries/</id>
  4542.    <link href="https://leap.tardate.com/playground/OLED/SSD1306WithAdaFruitLibraries/"/>
  4543.    <updated>2015-06-04T13:47:48Z</updated>
  4544.    <title>#086 OLED/SSD1306WithAdaFruitLibraries</title>
  4545.    <summary>running the AdaFruit example program with a monochrome 128x64 OLED Display</summary>
  4546.    <g:image_link>https://leap.tardate.com/playground/OLED/SSD1306WithAdaFruitLibraries/assets/SSD1306WithAdaFruitLibraries_build.jpg</g:image_link>
  4547.    <category term="OLED"/>
  4548.    <category term="Arduino"/>
  4549.  </entry>
  4550.  <entry>
  4551.    <id>https://leap.tardate.com/playground/Lcd5110/BareBack/</id>
  4552.    <link href="https://leap.tardate.com/playground/Lcd5110/BareBack/"/>
  4553.    <updated>2015-10-04T11:28:16Z</updated>
  4554.    <title>#085 Lcd5110/BareBack</title>
  4555.    <summary>driving a Nokia 5110 LCD Display with an Arduino and the raw command set</summary>
  4556.    <g:image_link>https://leap.tardate.com/playground/Lcd5110/BareBack/assets/BareBack_build.jpg</g:image_link>
  4557.    <category term="LCD"/>
  4558.    <category term="Arduino"/>
  4559.  </entry>
  4560.  <entry>
  4561.    <id>https://leap.tardate.com/Electronics101/555Timer/RouletteKit/</id>
  4562.    <link href="https://leap.tardate.com/Electronics101/555Timer/RouletteKit/"/>
  4563.    <updated>2015-06-04T13:47:47Z</updated>
  4564.    <title>#084 RouletteKit</title>
  4565.    <summary>build and examine the workings of a commercial 555 Roulette kit</summary>
  4566.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/RouletteKit/assets/RouletteKit_build.jpg</g:image_link>
  4567.    <category term="555 Timer"/>
  4568.  </entry>
  4569.  <entry>
  4570.    <id>https://leap.tardate.com/Electronics101/TransistorTester/</id>
  4571.    <link href="https://leap.tardate.com/Electronics101/TransistorTester/"/>
  4572.    <updated>2015-06-04T13:47:48Z</updated>
  4573.    <title>#083 Transistor Tester</title>
  4574.    <summary>use an Arduino to test NPN and PNP BJTs</summary>
  4575.    <g:image_link>https://leap.tardate.com/Electronics101/TransistorTester/assets/TransistorTester_build.jpg</g:image_link>
  4576.    <category term="Arduino"/>
  4577.    <category term="BJT"/>
  4578.  </entry>
  4579.  <entry>
  4580.    <id>https://leap.tardate.com/Electronics101/EMRDetection/MobileRFDetectorKit/</id>
  4581.    <link href="https://leap.tardate.com/Electronics101/EMRDetection/MobileRFDetectorKit/"/>
  4582.    <updated>2015-06-04T13:47:47Z</updated>
  4583.    <title>#082 MobileRFDetectorKit</title>
  4584.    <summary>build and investigate a commercially available &quot;mobile phone signal&quot; detector kit</summary>
  4585.    <g:image_link>https://leap.tardate.com/Electronics101/EMRDetection/MobileRFDetectorKit/assets/MobileRFDetectorKit_build.jpg</g:image_link>
  4586.    <category term="Radio"/>
  4587.  </entry>
  4588.  <entry>
  4589.    <id>https://leap.tardate.com/playground/Led4Digit7Segment/DoubleShiftWithFETs/</id>
  4590.    <link href="https://leap.tardate.com/playground/Led4Digit7Segment/DoubleShiftWithFETs/"/>
  4591.    <updated>2015-06-04T13:47:48Z</updated>
  4592.    <title>#081 Led4Digit7Segment/DoubleShiftWithFETs</title>
  4593.    <summary>driving a 4-Digit 7-Segment display with only 3 pins, using two 74HC595 shift registers and some n-channel FETs</summary>
  4594.    <g:image_link>https://leap.tardate.com/playground/Led4Digit7Segment/DoubleShiftWithFETs/assets/DoubleShiftWithFETs_build.jpg</g:image_link>
  4595.    <category term="7-Segment"/>
  4596.    <category term="CMOS/TTL"/>
  4597.    <category term="Arduino"/>
  4598.  </entry>
  4599.  <entry>
  4600.    <id>https://leap.tardate.com/playground/Led4Digit7Segment/DoubleShift/</id>
  4601.    <link href="https://leap.tardate.com/playground/Led4Digit7Segment/DoubleShift/"/>
  4602.    <updated>2015-06-04T13:47:48Z</updated>
  4603.    <title>#080 Led4Digit7Segment/DoubleShift</title>
  4604.    <summary>driving a 4-Digit 7-Segment display with only 3 pins, using two 74HC595 shift registers and some NPN BJTs</summary>
  4605.    <g:image_link>https://leap.tardate.com/playground/Led4Digit7Segment/DoubleShift/assets/DoubleShift_build.jpg</g:image_link>
  4606.    <category term="7-Segment"/>
  4607.    <category term="CMOS/TTL"/>
  4608.    <category term="Arduino"/>
  4609.  </entry>
  4610.  <entry>
  4611.    <id>https://leap.tardate.com/playground/LedTemperatureDisplay/</id>
  4612.    <link href="https://leap.tardate.com/playground/LedTemperatureDisplay/"/>
  4613.    <updated>2015-06-04T13:47:48Z</updated>
  4614.    <title>#079 LedTemperatureDisplay</title>
  4615.    <summary>measure ambient temperature using LM35 and display with a 4-digit 7-segment LED unit</summary>
  4616.    <g:image_link>https://leap.tardate.com/playground/LedTemperatureDisplay/assets/LedTemperatureDisplay_build.jpg</g:image_link>
  4617.    <category term="Sensors"/>
  4618.    <category term="LM35"/>
  4619.    <category term="7-Segment"/>
  4620.    <category term="Arduino"/>
  4621.  </entry>
  4622.  <entry>
  4623.    <id>https://leap.tardate.com/playground/Led4Digit7Segment/SingleShift/</id>
  4624.    <link href="https://leap.tardate.com/playground/Led4Digit7Segment/SingleShift/"/>
  4625.    <updated>2015-06-04T13:47:48Z</updated>
  4626.    <title>#078 Led4Digit7Segment/SingleShift</title>
  4627.    <summary>driving a 4-digit 7-segment display with a shift register and a few BJTs</summary>
  4628.    <g:image_link>https://leap.tardate.com/playground/Led4Digit7Segment/SingleShift/assets/SingleShift_build.jpg</g:image_link>
  4629.    <category term="7-Segment"/>
  4630.    <category term="CMOS/TTL"/>
  4631.    <category term="Arduino"/>
  4632.  </entry>
  4633.  <entry>
  4634.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchWithNorGates/</id>
  4635.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchWithNorGates/"/>
  4636.    <updated>2017-04-30T06:29:37Z</updated>
  4637.    <title>#077 SRLatchWithNorGates</title>
  4638.    <summary>Set-Reset latch implemented with NOR gates</summary>
  4639.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchWithNorGates/assets/SRLatchWithNorGates_build.jpg</g:image_link>
  4640.    <category term="Logic Gates"/>
  4641.    <category term="CMOS/TTL"/>
  4642.  </entry>
  4643.  <entry>
  4644.    <id>https://leap.tardate.com/playground/MonostablePulseExtender/</id>
  4645.    <link href="https://leap.tardate.com/playground/MonostablePulseExtender/"/>
  4646.    <updated>2015-06-04T13:47:48Z</updated>
  4647.    <title>#076 MonostablePulseExtender</title>
  4648.    <summary>test the behaviour of a 74LS122 monostable with external timing configuration and plot the results with an Arduino</summary>
  4649.    <g:image_link>https://leap.tardate.com/playground/MonostablePulseExtender/assets/MonostablePulseExtender_build.jpg</g:image_link>
  4650.    <category term="CMOS/TTL"/>
  4651.    <category term="Arduino"/>
  4652.  </entry>
  4653.  <entry>
  4654.    <id>https://leap.tardate.com/Electronics101/Monostable122/</id>
  4655.    <link href="https://leap.tardate.com/Electronics101/Monostable122/"/>
  4656.    <updated>2015-06-04T13:47:48Z</updated>
  4657.    <title>#075 Monostable 74LS122</title>
  4658.    <summary>simple pulse trigger using 74LS122 monostable with external timing configuration</summary>
  4659.    <g:image_link>https://leap.tardate.com/Electronics101/Monostable122/assets/Monostable122_build.jpg</g:image_link>
  4660.    <category term="CMOS/TTL"/>
  4661.  </entry>
  4662.  <entry>
  4663.    <id>https://leap.tardate.com/playground/TestIR/</id>
  4664.    <link href="https://leap.tardate.com/playground/TestIR/"/>
  4665.    <updated>2015-06-04T13:47:48Z</updated>
  4666.    <title>#074 TestIR</title>
  4667.    <summary>test raw IR reception with a TSOP1838-type IR sensor and an Arduino</summary>
  4668.    <g:image_link>https://leap.tardate.com/playground/TestIR/assets/TestIR_build.jpg</g:image_link>
  4669.    <category term="IR"/>
  4670.    <category term="Arduino"/>
  4671.  </entry>
  4672.  <entry>
  4673.    <id>https://leap.tardate.com/Electronics101/QuadNOR/</id>
  4674.    <link href="https://leap.tardate.com/Electronics101/QuadNOR/"/>
  4675.    <updated>2015-06-04T13:47:48Z</updated>
  4676.    <title>#073 QuadNOR</title>
  4677.    <summary>demo simple cascading NOR gate logic with the 74LS02 and an Arduino</summary>
  4678.    <g:image_link>https://leap.tardate.com/Electronics101/QuadNOR/assets/QuadNOR_build.jpg</g:image_link>
  4679.    <category term="CMOS/TTL"/>
  4680.    <category term="Arduino"/>
  4681.  </entry>
  4682.  <entry>
  4683.    <id>https://leap.tardate.com/Electronics101/NOR7402/</id>
  4684.    <link href="https://leap.tardate.com/Electronics101/NOR7402/"/>
  4685.    <updated>2015-06-04T13:47:48Z</updated>
  4686.    <title>#072 NOR7402</title>
  4687.    <summary>demo the 74LS02 Quad 2-input NOR gate with an Arduino</summary>
  4688.    <g:image_link>https://leap.tardate.com/Electronics101/NOR7402/assets/NOR7402_build.jpg</g:image_link>
  4689.    <category term="CMOS/TTL"/>
  4690.    <category term="Arduino"/>
  4691.  </entry>
  4692.  <entry>
  4693.    <id>https://leap.tardate.com/playground/ATtiny/TinyBlink/</id>
  4694.    <link href="https://leap.tardate.com/playground/ATtiny/TinyBlink/"/>
  4695.    <updated>2020-01-15T16:25:24Z</updated>
  4696.    <title>#071 TinyBlink</title>
  4697.    <summary>a simple blink sketch with an ATTINY85-20PU on a breadboard</summary>
  4698.    <g:image_link>https://leap.tardate.com/playground/ATtiny/TinyBlink/assets/TinyBlink_build.jpg</g:image_link>
  4699.    <category term="Arduino"/>
  4700.    <category term="ATmel"/>
  4701.  </entry>
  4702.  <entry>
  4703.    <id>https://leap.tardate.com/playground/ATtiny/ProgrammingWithArduinoISP/</id>
  4704.    <link href="https://leap.tardate.com/playground/ATtiny/ProgrammingWithArduinoISP/"/>
  4705.    <updated>2018-10-21T07:22:34Z</updated>
  4706.    <title>#070 ATtiny/ProgrammingWithArduinoISP</title>
  4707.    <summary>programming an ATTINY85-20PU on a breadboard with Arduino ISP</summary>
  4708.    <g:image_link>https://leap.tardate.com/playground/ATtiny/ProgrammingWithArduinoISP/assets/ProgrammingWithArduinoISP_build.jpg</g:image_link>
  4709.    <category term="Arduino"/>
  4710.    <category term="ATmel"/>
  4711.    <category term="ICSP"/>
  4712.  </entry>
  4713.  <entry>
  4714.    <id>https://leap.tardate.com/playground/ATmegaBreadboard/</id>
  4715.    <link href="https://leap.tardate.com/playground/ATmegaBreadboard/"/>
  4716.    <updated>2015-06-04T13:47:48Z</updated>
  4717.    <title>#069 ATmegaBreadboard</title>
  4718.    <summary>running an ATMEGA328P-PU on a breadboard </summary>
  4719.    <g:image_link>https://leap.tardate.com/playground/ATmegaBreadboard/assets/ATmegaBreadboard_build.jpg</g:image_link>
  4720.    <category term="Arduino"/>
  4721.    <category term="ATmel"/>
  4722.  </entry>
  4723.  <entry>
  4724.    <id>https://leap.tardate.com/playground/ATmegaViaArduinoISP/</id>
  4725.    <link href="https://leap.tardate.com/playground/ATmegaViaArduinoISP/"/>
  4726.    <updated>2015-06-04T13:47:48Z</updated>
  4727.    <title>#068 ATmegaViaArduinoISP</title>
  4728.    <summary>Programming an ATMEGA328P-PU on a breadboard with Arduino ISP</summary>
  4729.    <g:image_link>https://leap.tardate.com/playground/ATmegaViaArduinoISP/assets/ATmegaViaArduinoISP_build.jpg</g:image_link>
  4730.    <category term="Arduino"/>
  4731.    <category term="ATmel"/>
  4732.    <category term="ICSP"/>
  4733.  </entry>
  4734.  <entry>
  4735.    <id>https://leap.tardate.com/Electronics101/LED/ACBulb/</id>
  4736.    <link href="https://leap.tardate.com/Electronics101/LED/ACBulb/"/>
  4737.    <updated>2019-04-21T08:16:06Z</updated>
  4738.    <title>#067 LED AC Bulb</title>
  4739.    <summary>build and analyse a commercial LED lamp kit with capacitive power supply</summary>
  4740.    <g:image_link>https://leap.tardate.com/Electronics101/LED/ACBulb/assets/ACBulb_build.jpg</g:image_link>
  4741.    <category term="Power"/>
  4742.    <category term="LED"/>
  4743.  </entry>
  4744.  <entry>
  4745.    <id>https://leap.tardate.com/Electronics101/SwitchNFET/</id>
  4746.    <link href="https://leap.tardate.com/Electronics101/SwitchNFET/"/>
  4747.    <updated>2015-06-04T13:47:48Z</updated>
  4748.    <title>#066 Switch - NFET</title>
  4749.    <summary>small-signal n-channel MOSFET switch with turn-off delay</summary>
  4750.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchNFET/assets/SwitchNFET_build.jpg</g:image_link>
  4751.    <category term="MOSFET"/>
  4752.  </entry>
  4753.  <entry>
  4754.    <id>https://leap.tardate.com/playground/LevelIndicatorLM3915/</id>
  4755.    <link href="https://leap.tardate.com/playground/LevelIndicatorLM3915/"/>
  4756.    <updated>2015-06-04T13:47:48Z</updated>
  4757.    <title>#065 LevelIndicatorLM3915</title>
  4758.    <summary>Driving an LM3915 10-segment display with a single Arduino pin</summary>
  4759.    <g:image_link>https://leap.tardate.com/playground/LevelIndicatorLM3915/assets/LevelIndicatorLM3915_build.jpg</g:image_link>
  4760.    <category term="LM3915"/>
  4761.    <category term="Arduino"/>
  4762.  </entry>
  4763.  <entry>
  4764.    <id>https://leap.tardate.com/Radio/LPD433/RFSwitchASK/</id>
  4765.    <link href="https://leap.tardate.com/Radio/LPD433/RFSwitchASK/"/>
  4766.    <updated>2019-09-29T13:47:06Z</updated>
  4767.    <title>#064 ASK RF Switch</title>
  4768.    <summary>data communications using ASK protocol over 433Mhz RF transmitter and receiver set</summary>
  4769.    <g:image_link>https://leap.tardate.com/Radio/LPD433/RFSwitchASK/assets/RFSwitchASK_build.jpg</g:image_link>
  4770.    <category term="Radio"/>
  4771.    <category term="ASK"/>
  4772.    <category term="Arduino"/>
  4773.    <category term="LPD433"/>
  4774.  </entry>
  4775.  <entry>
  4776.    <id>https://leap.tardate.com/Radio/LPD433/RFSwitch/</id>
  4777.    <link href="https://leap.tardate.com/Radio/LPD433/RFSwitch/"/>
  4778.    <updated>2019-09-29T13:47:06Z</updated>
  4779.    <title>#063 RFSwitch</title>
  4780.    <summary>simple remote control switch with 433Mhz transmitter/receiver and some analog signal processing</summary>
  4781.    <g:image_link>https://leap.tardate.com/Radio/LPD433/RFSwitch/assets/RFSwitch_build.jpg</g:image_link>
  4782.    <category term="Radio"/>
  4783.    <category term="OpAmp"/>
  4784.    <category term="LPD433"/>
  4785.  </entry>
  4786.  <entry>
  4787.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchFlipper/</id>
  4788.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchFlipper/"/>
  4789.    <updated>2017-04-30T06:29:37Z</updated>
  4790.    <title>#062 SRLatchFlipper</title>
  4791.    <summary>Set/Reset latch with BJTs, controlled and monitored by an Arduino</summary>
  4792.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatchFlipper/assets/SRLatchFlipper_build.jpg</g:image_link>
  4793.    <category term="Logic Gates"/>
  4794.    <category term="BJT"/>
  4795.    <category term="Arduino"/>
  4796.  </entry>
  4797.  <entry>
  4798.    <id>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatch/</id>
  4799.    <link href="https://leap.tardate.com/Electronics101/DigitalLogic/SRLatch/"/>
  4800.    <updated>2017-04-30T06:29:37Z</updated>
  4801.    <title>#061 SRLatch</title>
  4802.    <summary>Set/Reset latch with BJTs</summary>
  4803.    <g:image_link>https://leap.tardate.com/Electronics101/DigitalLogic/SRLatch/assets/SRLatch_build.jpg</g:image_link>
  4804.    <category term="Logic Gates"/>
  4805.    <category term="BJT"/>
  4806.  </entry>
  4807.  <entry>
  4808.    <id>https://leap.tardate.com/Electronics101/Power/Breadboard5V/</id>
  4809.    <link href="https://leap.tardate.com/Electronics101/Power/Breadboard5V/"/>
  4810.    <updated>2019-12-16T17:24:08Z</updated>
  4811.    <title>#060 5V Breadboard Regulator</title>
  4812.    <summary>an LM7805 5V regulated power supply on breadboard-compatible protobboard</summary>
  4813.    <g:image_link>https://leap.tardate.com/Electronics101/Power/Breadboard5V/assets/Breadboard5V_build.jpg</g:image_link>
  4814.    <category term="Breadboard Bling"/>
  4815.    <category term="Power"/>
  4816.  </entry>
  4817.  <entry>
  4818.    <id>https://leap.tardate.com/Electronics101/555Timer/TwoToneDoorbell/</id>
  4819.    <link href="https://leap.tardate.com/Electronics101/555Timer/TwoToneDoorbell/"/>
  4820.    <updated>2019-12-28T09:22:23Z</updated>
  4821.    <title>#059 Two-tone Doorbell</title>
  4822.    <summary>basic two-tone doorbell using a 555 timer oscillator, with n-channel FET for power conservation</summary>
  4823.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/TwoToneDoorbell/assets/TwoToneDoorbell_build.jpg</g:image_link>
  4824.    <category term="555 Timer"/>
  4825.    <category term="Oscillators"/>
  4826.  </entry>
  4827.  <entry>
  4828.    <id>https://leap.tardate.com/playground/Led4Digit7Segment/</id>
  4829.    <link href="https://leap.tardate.com/playground/Led4Digit7Segment/"/>
  4830.    <updated>2016-10-03T13:11:01Z</updated>
  4831.    <title>#058 Led4Digit7Segment</title>
  4832.    <summary>overview of driving a 4-digit 7-segment display</summary>
  4833.    <g:image_link>https://leap.tardate.com/playground/Led4Digit7Segment/assets/Led4Digit7Segment_build.jpg</g:image_link>
  4834.    <category term="7-Segment"/>
  4835.    <category term="Arduino"/>
  4836.  </entry>
  4837.  <entry>
  4838.    <id>https://leap.tardate.com/Electronics101/CapacitanceTester/</id>
  4839.    <link href="https://leap.tardate.com/Electronics101/CapacitanceTester/"/>
  4840.    <updated>2015-03-15T05:44:03Z</updated>
  4841.    <title>#057 CapacitanceTester</title>
  4842.    <summary>capacitor tester with LCD output</summary>
  4843.    <g:image_link>https://leap.tardate.com/Electronics101/CapacitanceTester/assets/CapacitanceTester_build.jpg</g:image_link>
  4844.    <category term="LCD"/>
  4845.    <category term="RC"/>
  4846.    <category term="Arduino"/>
  4847.  </entry>
  4848.  <entry>
  4849.    <id>https://leap.tardate.com/playground/JoystickServoControl/</id>
  4850.    <link href="https://leap.tardate.com/playground/JoystickServoControl/"/>
  4851.    <updated>2015-06-04T13:47:48Z</updated>
  4852.    <title>#056 JoystickServoControl</title>
  4853.    <summary>controlling two SG90 servos with a joystick</summary>
  4854.    <g:image_link>https://leap.tardate.com/playground/JoystickServoControl/assets/JoystickServoControl_build.jpg</g:image_link>
  4855.    <category term="Human Input"/>
  4856.    <category term="Arduino"/>
  4857.  </entry>
  4858.  <entry>
  4859.    <id>https://leap.tardate.com/playground/RelayControlTest/</id>
  4860.    <link href="https://leap.tardate.com/playground/RelayControlTest/"/>
  4861.    <updated>2015-06-04T13:47:48Z</updated>
  4862.    <title>#055 RelayControlTest</title>
  4863.    <summary>quick test to drive a motor with a common relay using NPN switching circuit under Arduino control</summary>
  4864.    <g:image_link>https://leap.tardate.com/playground/RelayControlTest/assets/RelayControlTest_build.jpg</g:image_link>
  4865.    <category term="Servo"/>
  4866.    <category term="Arduino"/>
  4867.  </entry>
  4868.  <entry>
  4869.    <id>https://leap.tardate.com/playground/RelayModuleTest/</id>
  4870.    <link href="https://leap.tardate.com/playground/RelayModuleTest/"/>
  4871.    <updated>2015-06-04T13:47:48Z</updated>
  4872.    <title>#054 RelayModuleTest</title>
  4873.    <summary>quick test of a common relay board to switch a motor under Arduino control</summary>
  4874.    <g:image_link>https://leap.tardate.com/playground/RelayModuleTest/assets/RelayModuleTest_build.jpg</g:image_link>
  4875.    <category term="Servo"/>
  4876.    <category term="Arduino"/>
  4877.  </entry>
  4878.  <entry>
  4879.    <id>https://leap.tardate.com/Electronics101/FunctionGenerator324/</id>
  4880.    <link href="https://leap.tardate.com/Electronics101/FunctionGenerator324/"/>
  4881.    <updated>2015-06-04T13:47:47Z</updated>
  4882.    <title>#053 FunctionGenerator324</title>
  4883.    <summary>LM324 configured as a low-frequency square, triangle, sine, and cosine function generator</summary>
  4884.    <g:image_link>https://leap.tardate.com/Electronics101/FunctionGenerator324/assets/FunctionGenerator324_build.jpg</g:image_link>
  4885.    <category term="OpAmp"/>
  4886.    <category term="Oscillators"/>
  4887.  </entry>
  4888.  <entry>
  4889.    <id>https://leap.tardate.com/Electronics101/Comparator741/</id>
  4890.    <link href="https://leap.tardate.com/Electronics101/Comparator741/"/>
  4891.    <updated>2015-04-04T02:21:41Z</updated>
  4892.    <title>#052 Comparator741</title>
  4893.    <summary>demo LM741 OpAmp comparator mode (with PWM-to-analog side-topic)</summary>
  4894.    <g:image_link>https://leap.tardate.com/Electronics101/Comparator741/assets/Comparator741_build.jpg</g:image_link>
  4895.    <category term="OpAmp"/>
  4896.  </entry>
  4897.  <entry>
  4898.    <id>https://leap.tardate.com/playground/JarabeTapatio/</id>
  4899.    <link href="https://leap.tardate.com/playground/JarabeTapatio/"/>
  4900.    <updated>2015-04-04T02:21:41Z</updated>
  4901.    <title>#051 El Jarabe Tapatío</title>
  4902.    <summary>play The Mexican Hat Dance on a piezo buzzer with LM 386 amplification</summary>
  4903.    <g:image_link>https://leap.tardate.com/playground/JarabeTapatio/assets/JarabeTapatio_build.jpg</g:image_link>
  4904.    <category term="Audio"/>
  4905.    <category term="Arduino"/>
  4906.  </entry>
  4907.  <entry>
  4908.    <id>https://leap.tardate.com/Girabot/</id>
  4909.    <link href="https://leap.tardate.com/Girabot/"/>
  4910.    <updated>2016-06-23T14:50:15Z</updated>
  4911.    <title>#050 Girabot</title>
  4912.    <summary>EE40LX Electronic Interfaces robot project</summary>
  4913.    <g:image_link>https://leap.tardate.com/Girabot/assets/Girabot_build.jpg</g:image_link>
  4914.    <category term="Sensors"/>
  4915.    <category term="OpAmp"/>
  4916.    <category term="Arduino"/>
  4917.  </entry>
  4918.  <entry>
  4919.    <id>https://leap.tardate.com/Electronics101/Oscillators/BjtRcOscillator/</id>
  4920.    <link href="https://leap.tardate.com/Electronics101/Oscillators/BjtRcOscillator/"/>
  4921.    <updated>2019-06-02T04:21:51Z</updated>
  4922.    <title>#049 BJT RC Oscillator</title>
  4923.    <summary>simple RC/transistor multistable vibrator</summary>
  4924.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/BjtRcOscillator/assets/BjtRcOscillator_build.jpg</g:image_link>
  4925.    <category term="BJT"/>
  4926.    <category term="RC"/>
  4927.    <category term="Oscillators"/>
  4928.  </entry>
  4929.  <entry>
  4930.    <id>https://leap.tardate.com/playground/StereoLightTrigger/</id>
  4931.    <link href="https://leap.tardate.com/playground/StereoLightTrigger/"/>
  4932.    <updated>2015-04-04T02:21:41Z</updated>
  4933.    <title>#048 StereoLightTrigger</title>
  4934.    <summary>demo an interrupt-driven method for responding to LDR light threshold triggers</summary>
  4935.    <g:image_link>https://leap.tardate.com/playground/StereoLightTrigger/assets/StereoLightTrigger_build.jpg</g:image_link>
  4936.    <category term="Sensors"/>
  4937.    <category term="Arduino"/>
  4938.  </entry>
  4939.  <entry>
  4940.    <id>https://leap.tardate.com/Electronics101/LDRStereoTripDetector/</id>
  4941.    <link href="https://leap.tardate.com/Electronics101/LDRStereoTripDetector/"/>
  4942.    <updated>2015-04-04T02:21:41Z</updated>
  4943.    <title>#047 LDRStereoTripDetector</title>
  4944.    <summary>demo LM324 OpAmp as threshold trigger for stereo LDR/Wheatstone Bridge sensor</summary>
  4945.    <g:image_link>https://leap.tardate.com/Electronics101/LDRStereoTripDetector/assets/LDRStereoTripDetector_build.jpg</g:image_link>
  4946.    <category term="OpAmp"/>
  4947.  </entry>
  4948.  <entry>
  4949.    <id>https://leap.tardate.com/playground/MotorControlPWM/</id>
  4950.    <link href="https://leap.tardate.com/playground/MotorControlPWM/"/>
  4951.    <updated>2015-03-21T10:00:31Z</updated>
  4952.    <title>#046 MotorControlPWM</title>
  4953.    <summary>tests PWM speed control of a DC motor driven by an Arduino</summary>
  4954.    <g:image_link>https://leap.tardate.com/playground/MotorControlPWM/assets/MotorControlPWM_build.jpg</g:image_link>
  4955.    <category term="Motors"/>
  4956.    <category term="Arduino"/>
  4957.  </entry>
  4958.  <entry>
  4959.    <id>https://leap.tardate.com/Electronics101/555Timer/SimpleSiren/</id>
  4960.    <link href="https://leap.tardate.com/Electronics101/555Timer/SimpleSiren/"/>
  4961.    <updated>2015-03-21T10:00:31Z</updated>
  4962.    <title>#045 SimpleSiren</title>
  4963.    <summary>classic timer circuit producing a two-tone oscillation</summary>
  4964.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/SimpleSiren/assets/SimpleSiren_build.jpg</g:image_link>
  4965.    <category term="555 Timer"/>
  4966.  </entry>
  4967.  <entry>
  4968.    <id>https://leap.tardate.com/Electronics101/555Timer/SimpleChime/</id>
  4969.    <link href="https://leap.tardate.com/Electronics101/555Timer/SimpleChime/"/>
  4970.    <updated>2015-03-21T10:00:31Z</updated>
  4971.    <title>#044 SimpleChime</title>
  4972.    <summary>play a sound for a fixed duration when a button is pressed</summary>
  4973.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/SimpleChime/assets/SimpleChime_build.jpg</g:image_link>
  4974.    <category term="555 Timer"/>
  4975.  </entry>
  4976.  <entry>
  4977.    <id>https://leap.tardate.com/playground/HitTheLights/</id>
  4978.    <link href="https://leap.tardate.com/playground/HitTheLights/"/>
  4979.    <updated>2015-03-15T05:44:04Z</updated>
  4980.    <title>#043 HitTheLights</title>
  4981.    <summary>simple LED game with LCD output and interrupt-driven button input</summary>
  4982.    <g:image_link>https://leap.tardate.com/playground/HitTheLights/assets/HitTheLights_build.jpg</g:image_link>
  4983.    <category term="LCD"/>
  4984.    <category term="Human Input"/>
  4985.    <category term="Arduino"/>
  4986.  </entry>
  4987.  <entry>
  4988.    <id>https://leap.tardate.com/playground/ServoTest/</id>
  4989.    <link href="https://leap.tardate.com/playground/ServoTest/"/>
  4990.    <updated>2015-03-15T05:44:04Z</updated>
  4991.    <title>#042 ServoTest</title>
  4992.    <summary>test the positioning accuracy of an SG90 servo motor driven by an Arduino</summary>
  4993.    <g:image_link>https://leap.tardate.com/playground/ServoTest/assets/ServoTest_build.jpg</g:image_link>
  4994.    <category term="Servo"/>
  4995.    <category term="Arduino"/>
  4996.  </entry>
  4997.  <entry>
  4998.    <id>https://leap.tardate.com/playground/Shifty/</id>
  4999.    <link href="https://leap.tardate.com/playground/Shifty/"/>
  5000.    <updated>2015-03-15T05:44:04Z</updated>
  5001.    <title>#041 Shifty</title>
  5002.    <summary>drive 8 LEDs with 3 pins using a 74HC595 shift register</summary>
  5003.    <g:image_link>https://leap.tardate.com/playground/Shifty/assets/Shifty_build.jpg</g:image_link>
  5004.    <category term="LED"/>
  5005.    <category term="CMOS/TTL"/>
  5006.    <category term="Arduino"/>
  5007.  </entry>
  5008.  <entry>
  5009.    <id>https://leap.tardate.com/Electronics101/MeLEDy/</id>
  5010.    <link href="https://leap.tardate.com/Electronics101/MeLEDy/"/>
  5011.    <updated>2015-03-15T05:44:03Z</updated>
  5012.    <title>#040 MeLEDy</title>
  5013.    <summary>use an electret microphone to light a series of LEDs in proportion to volume</summary>
  5014.    <g:image_link>https://leap.tardate.com/Electronics101/MeLEDy/assets/MeLEDy_build.jpg</g:image_link>
  5015.    <category term="Audio"/>
  5016.  </entry>
  5017.  <entry>
  5018.    <id>https://leap.tardate.com/Electronics101/Oscillators/AstableOpamp/</id>
  5019.    <link href="https://leap.tardate.com/Electronics101/Oscillators/AstableOpamp/"/>
  5020.    <updated>2017-08-19T13:50:42Z</updated>
  5021.    <title>#039 Square Wave - LM324</title>
  5022.    <summary>using an LM324 OpAmp to generate a square wave (astable opamp oscillator)</summary>
  5023.    <g:image_link>https://leap.tardate.com/Electronics101/Oscillators/AstableOpamp/assets/AstableOpamp_build.jpg</g:image_link>
  5024.    <category term="OpAmp"/>
  5025.    <category term="Oscillators"/>
  5026.  </entry>
  5027.  <entry>
  5028.    <id>https://leap.tardate.com/playground/ElectretADC/</id>
  5029.    <link href="https://leap.tardate.com/playground/ElectretADC/"/>
  5030.    <updated>2015-03-15T05:44:04Z</updated>
  5031.    <title>#038 ElectretADC</title>
  5032.    <summary>convert electret signal to a full range analog input with an LM324 preamp and plot the raw and aplified signals</summary>
  5033.    <g:image_link>https://leap.tardate.com/playground/ElectretADC/assets/ElectretADC_build.jpg</g:image_link>
  5034.    <category term="Audio"/>
  5035.    <category term="Arduino"/>
  5036.  </entry>
  5037.  <entry>
  5038.    <id>https://leap.tardate.com/playground/ElectretTrigger/</id>
  5039.    <link href="https://leap.tardate.com/playground/ElectretTrigger/"/>
  5040.    <updated>2015-04-04T02:21:41Z</updated>
  5041.    <title>#037 ElectretTrigger</title>
  5042.    <summary>uses an electret microphone and LM324 amplifier to trigger action when over audio threshold</summary>
  5043.    <g:image_link>https://leap.tardate.com/playground/ElectretTrigger/assets/ElectretTrigger_build.jpg</g:image_link>
  5044.    <category term="Sensors"/>
  5045.    <category term="Audio"/>
  5046.    <category term="OpAmp"/>
  5047.    <category term="Arduino"/>
  5048.  </entry>
  5049.  <entry>
  5050.    <id>https://leap.tardate.com/Electronics101/NonInverting324/</id>
  5051.    <link href="https://leap.tardate.com/Electronics101/NonInverting324/"/>
  5052.    <updated>2015-03-15T05:44:03Z</updated>
  5053.    <title>#036 NonInverting324</title>
  5054.    <summary>demo LM324 OpAmp non-inverting DC gain mode</summary>
  5055.    <g:image_link>https://leap.tardate.com/Electronics101/NonInverting324/assets/NonInverting324_build.jpg</g:image_link>
  5056.    <category term="OpAmp"/>
  5057.  </entry>
  5058.  <entry>
  5059.    <id>https://leap.tardate.com/playground/RangeFinder/</id>
  5060.    <link href="https://leap.tardate.com/playground/RangeFinder/"/>
  5061.    <updated>2015-03-15T05:44:04Z</updated>
  5062.    <title>#035 RangeFinder</title>
  5063.    <summary>proximity/distance measurement with an HC-SR04 untrasonic ranging module</summary>
  5064.    <g:image_link>https://leap.tardate.com/playground/RangeFinder/assets/RangeFinder_build.jpg</g:image_link>
  5065.    <category term="Sensors"/>
  5066.    <category term="Arduino"/>
  5067.    <category term="HC-SR04"/>
  5068.  </entry>
  5069.  <entry>
  5070.    <id>https://leap.tardate.com/Electronics101/LDRComparator/</id>
  5071.    <link href="https://leap.tardate.com/Electronics101/LDRComparator/"/>
  5072.    <updated>2015-03-15T05:44:03Z</updated>
  5073.    <title>#034 LDRComparator</title>
  5074.    <summary>low-light/proximity Trip Detector demonstration using LM324 and LDR/Wheatstone Bridge sensor</summary>
  5075.    <g:image_link>https://leap.tardate.com/Electronics101/LDRComparator/assets/LDRComparator_build.jpg</g:image_link>
  5076.    <category term="Sensors"/>
  5077.    <category term="OpAmp"/>
  5078.    <category term="Arduino"/>
  5079.  </entry>
  5080.  <entry>
  5081.    <id>https://leap.tardate.com/Electronics101/SwitchPNP/</id>
  5082.    <link href="https://leap.tardate.com/Electronics101/SwitchPNP/"/>
  5083.    <updated>2015-03-15T05:44:04Z</updated>
  5084.    <title>#033 Switch - PNP</title>
  5085.    <summary>small-signal digital switch with PNP BJT</summary>
  5086.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchPNP/assets/SwitchPNP_build.jpg</g:image_link>
  5087.    <category term="BJT"/>
  5088.  </entry>
  5089.  <entry>
  5090.    <id>https://leap.tardate.com/Electronics101/SwitchNPN/</id>
  5091.    <link href="https://leap.tardate.com/Electronics101/SwitchNPN/"/>
  5092.    <updated>2015-03-15T05:44:04Z</updated>
  5093.    <title>#032 Switch - NPN</title>
  5094.    <summary>small-signal digital switch with NPN BJT</summary>
  5095.    <g:image_link>https://leap.tardate.com/Electronics101/SwitchNPN/assets/SwitchNPN_build.jpg</g:image_link>
  5096.    <category term="BJT"/>
  5097.  </entry>
  5098.  <entry>
  5099.    <id>https://leap.tardate.com/Electronics101/555Timer/TriangleWaveGen/</id>
  5100.    <link href="https://leap.tardate.com/Electronics101/555Timer/TriangleWaveGen/"/>
  5101.    <updated>2015-03-15T05:44:03Z</updated>
  5102.    <title>#031 Triangle Wave - 555</title>
  5103.    <summary>generate a triangle wave with 555 timer astable oscillator and RC integrator</summary>
  5104.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/TriangleWaveGen/assets/TriangleWaveGen_build.jpg</g:image_link>
  5105.    <category term="555 Timer"/>
  5106.    <category term="Oscillators"/>
  5107.  </entry>
  5108.  <entry>
  5109.    <id>https://leap.tardate.com/playground/BlinkPrecision/</id>
  5110.    <link href="https://leap.tardate.com/playground/BlinkPrecision/"/>
  5111.    <updated>2015-03-15T05:44:04Z</updated>
  5112.    <title>#030 BlinkPrecision</title>
  5113.    <summary>use a timer to perform a function on a precise schedule</summary>
  5114.    <g:image_link>https://leap.tardate.com/playground/BlinkPrecision/assets/BlinkPrecision_build.jpg</g:image_link>
  5115.    <category term="LED"/>
  5116.    <category term="Timing"/>
  5117.    <category term="Arduino"/>
  5118.  </entry>
  5119.  <entry>
  5120.    <id>https://leap.tardate.com/Electronics101/PowerZener/</id>
  5121.    <link href="https://leap.tardate.com/Electronics101/PowerZener/"/>
  5122.    <updated>2015-03-15T05:44:03Z</updated>
  5123.    <title>#029 PowerZener</title>
  5124.    <summary>test and graph a power supply regulated with a 1N4733 zener diode</summary>
  5125.    <g:image_link>https://leap.tardate.com/Electronics101/PowerZener/assets/PowerZener_build.jpg</g:image_link>
  5126.    <category term="Power"/>
  5127.  </entry>
  5128.  <entry>
  5129.    <id>https://leap.tardate.com/Electronics101/PowerMB102/</id>
  5130.    <link href="https://leap.tardate.com/Electronics101/PowerMB102/"/>
  5131.    <updated>2015-03-15T05:44:03Z</updated>
  5132.    <title>#028 PowerMB102</title>
  5133.    <summary>demo and test a commercial 3.3/5V MB102 breadboard power supply unit</summary>
  5134.    <g:image_link>https://leap.tardate.com/Electronics101/PowerMB102/assets/PowerMB102_build.jpg</g:image_link>
  5135.    <category term="Power"/>
  5136.  </entry>
  5137.  <entry>
  5138.    <id>https://leap.tardate.com/Electronics101/Power7805/</id>
  5139.    <link href="https://leap.tardate.com/Electronics101/Power7805/"/>
  5140.    <updated>2015-03-15T05:44:03Z</updated>
  5141.    <title>#027 Power7805</title>
  5142.    <summary>test and graph a voltage supply built with an LM7805 5V Regulated Supply</summary>
  5143.    <g:image_link>https://leap.tardate.com/Electronics101/Power7805/assets/Power7805_build.jpg</g:image_link>
  5144.    <category term="Power"/>
  5145.  </entry>
  5146.  <entry>
  5147.    <id>https://leap.tardate.com/Electronics101/Power317/</id>
  5148.    <link href="https://leap.tardate.com/Electronics101/Power317/"/>
  5149.    <updated>2016-06-23T14:50:15Z</updated>
  5150.    <title>#026 Power317</title>
  5151.    <summary>test/graph an adjustable voltage supply built with the LM317 Adjustable Regulator</summary>
  5152.    <g:image_link>https://leap.tardate.com/Electronics101/Power317/assets/Power317_build.jpg</g:image_link>
  5153.    <category term="Power"/>
  5154.  </entry>
  5155.  <entry>
  5156.    <id>https://leap.tardate.com/Electronics101/QuadLatch/</id>
  5157.    <link href="https://leap.tardate.com/Electronics101/QuadLatch/"/>
  5158.    <updated>2015-03-15T05:44:03Z</updated>
  5159.    <title>#025 Quad Latch</title>
  5160.    <summary>graph the basic operation of the 74LS75 4-bit bistable latch</summary>
  5161.    <g:image_link>https://leap.tardate.com/Electronics101/QuadLatch/assets/QuadLatch_build.jpg</g:image_link>
  5162.    <category term="CMOS/TTL"/>
  5163.  </entry>
  5164.  <entry>
  5165.    <id>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/AND/</id>
  5166.    <link href="https://leap.tardate.com/Electronics101/ResistorTransistorLogic/AND/"/>
  5167.    <updated>2015-07-06T10:56:17Z</updated>
  5168.    <title>#024 ResistorTransistorLogic/AND</title>
  5169.    <summary>test the basic resistor-transistor logic AND gate </summary>
  5170.    <g:image_link>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/AND/assets/AND_build.jpg</g:image_link>
  5171.    <category term="BJT"/>
  5172.    <category term="RTL"/>
  5173.    <category term="Logic Gates"/>
  5174.  </entry>
  5175.  <entry>
  5176.    <id>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NAND/</id>
  5177.    <link href="https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NAND/"/>
  5178.    <updated>2015-07-06T10:56:17Z</updated>
  5179.    <title>#023 ResistorTransistorLogic/NAND</title>
  5180.    <summary>test the basic resistor-transistor logic NAND gate </summary>
  5181.    <g:image_link>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NAND/assets/NAND_build.jpg</g:image_link>
  5182.    <category term="BJT"/>
  5183.    <category term="RTL"/>
  5184.    <category term="Logic Gates"/>
  5185.  </entry>
  5186.  <entry>
  5187.    <id>https://leap.tardate.com/Electronics101/SchmittOscillator/</id>
  5188.    <link href="https://leap.tardate.com/Electronics101/SchmittOscillator/"/>
  5189.    <updated>2015-09-18T12:20:06Z</updated>
  5190.    <title>#022 Square Wave - Schmitt</title>
  5191.    <summary>using an 74LS14 Hex Inverter with Schmitt Trigger Inputs to generate a square wave</summary>
  5192.    <g:image_link>https://leap.tardate.com/Electronics101/SchmittOscillator/assets/SchmittOscillator_build.jpg</g:image_link>
  5193.    <category term="CMOS/TTL"/>
  5194.    <category term="Oscillators"/>
  5195.  </entry>
  5196.  <entry>
  5197.    <id>https://leap.tardate.com/Electronics101/SchmittInverter/</id>
  5198.    <link href="https://leap.tardate.com/Electronics101/SchmittInverter/"/>
  5199.    <updated>2016-06-23T14:50:15Z</updated>
  5200.    <title>#021 Schmitt Inverter</title>
  5201.    <summary>graph the basic operation of the 74LS14 Hex Inverter with Schmitt Trigger Inputs</summary>
  5202.    <g:image_link>https://leap.tardate.com/Electronics101/SchmittInverter/assets/SchmittInverter_build.jpg</g:image_link>
  5203.    <category term="CMOS/TTL"/>
  5204.  </entry>
  5205.  <entry>
  5206.    <id>https://leap.tardate.com/playground/Internals/</id>
  5207.    <link href="https://leap.tardate.com/playground/Internals/"/>
  5208.    <updated>2018-07-28T06:39:21Z</updated>
  5209.    <title>#020 Arduino Internals</title>
  5210.    <summary>report on Arduino Board internals</summary>
  5211.    <g:image_link>https://leap.tardate.com/playground/Internals/assets/Internals_build.jpg</g:image_link>
  5212.    <category term="Arduino"/>
  5213.  </entry>
  5214.  <entry>
  5215.    <id>https://leap.tardate.com/playground/Popcorn/</id>
  5216.    <link href="https://leap.tardate.com/playground/Popcorn/"/>
  5217.    <updated>2015-03-15T05:44:04Z</updated>
  5218.    <title>#019 Popcorn</title>
  5219.    <summary>How to make a piezo buzzer even more annoying? Make it play popcorn!</summary>
  5220.    <g:image_link>https://leap.tardate.com/playground/Popcorn/assets/Popcorn_build.jpg</g:image_link>
  5221.    <category term="Audio"/>
  5222.    <category term="Arduino"/>
  5223.  </entry>
  5224.  <entry>
  5225.    <id>https://leap.tardate.com/FretBoard/</id>
  5226.    <link href="https://leap.tardate.com/FretBoard/"/>
  5227.    <updated>2016-10-03T13:11:01Z</updated>
  5228.    <title>#018 FretBoard</title>
  5229.    <summary>a multi-project build status indicator, that pulls software build status from the net and animates the status of up to 24 projects with an LED array</summary>
  5230.    <g:image_link>https://leap.tardate.com/FretBoard/assets/FretBoard_build.jpg</g:image_link>
  5231.    <category term="LED Array"/>
  5232.    <category term="Arduino"/>
  5233.  </entry>
  5234.  <entry>
  5235.    <id>https://leap.tardate.com/Electronics101/555Timer/Monostable/</id>
  5236.    <link href="https://leap.tardate.com/Electronics101/555Timer/Monostable/"/>
  5237.    <updated>2015-03-15T05:44:03Z</updated>
  5238.    <title>#017 Monostable</title>
  5239.    <summary>basic monostable mode using an Arduino and processing to plot the output</summary>
  5240.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/Monostable/assets/Monostable_build.jpg</g:image_link>
  5241.    <category term="555 Timer"/>
  5242.  </entry>
  5243.  <entry>
  5244.    <id>https://leap.tardate.com/Electronics101/555Timer/AstableOscillator/</id>
  5245.    <link href="https://leap.tardate.com/Electronics101/555Timer/AstableOscillator/"/>
  5246.    <updated>2015-03-15T05:44:03Z</updated>
  5247.    <title>#016 Square Wave - 555</title>
  5248.    <summary>using a 555 timer as an astable oscillator to generate a square wave and an Arduino and processing to plot the output</summary>
  5249.    <g:image_link>https://leap.tardate.com/Electronics101/555Timer/AstableOscillator/assets/AstableOscillator_build.jpg</g:image_link>
  5250.    <category term="555 Timer"/>
  5251.    <category term="Oscillators"/>
  5252.  </entry>
  5253.  <entry>
  5254.    <id>https://leap.tardate.com/LEDArrayDemos/StripTease/</id>
  5255.    <link href="https://leap.tardate.com/LEDArrayDemos/StripTease/"/>
  5256.    <updated>2016-06-23T14:50:15Z</updated>
  5257.    <title>#015 StripTease</title>
  5258.    <summary>demo a range of effects on the LED strip</summary>
  5259.    <g:image_link>https://leap.tardate.com/LEDArrayDemos/StripTease/assets/StripTease_build.jpg</g:image_link>
  5260.    <category term="LED Array"/>
  5261.    <category term="Arduino"/>
  5262.  </entry>
  5263.  <entry>
  5264.    <id>https://leap.tardate.com/LEDArrayDemos/AsyncLedStripEffects/</id>
  5265.    <link href="https://leap.tardate.com/LEDArrayDemos/AsyncLedStripEffects/"/>
  5266.    <updated>2016-06-23T14:50:15Z</updated>
  5267.    <title>#014 AsyncLedStripEffects</title>
  5268.    <summary>demo effects on the LED strip driven using timer interrupt</summary>
  5269.    <g:image_link>https://leap.tardate.com/LEDArrayDemos/AsyncLedStripEffects/assets/AsyncLedStripEffects_build.jpg</g:image_link>
  5270.    <category term="LED Array"/>
  5271.    <category term="Timing"/>
  5272.    <category term="Arduino"/>
  5273.  </entry>
  5274.  <entry>
  5275.    <id>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NOT/</id>
  5276.    <link href="https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NOT/"/>
  5277.    <updated>2015-07-06T10:56:17Z</updated>
  5278.    <title>#013 ResistorTransistorLogic/NOT</title>
  5279.    <summary>test the basic resistor-transistor logic NOT gate (Inverter)</summary>
  5280.    <g:image_link>https://leap.tardate.com/Electronics101/ResistorTransistorLogic/NOT/assets/NOT_build.jpg</g:image_link>
  5281.    <category term="BJT"/>
  5282.    <category term="RTL"/>
  5283.    <category term="Logic Gates"/>
  5284.  </entry>
  5285.  <entry>
  5286.    <id>https://leap.tardate.com/Electronics101/Capacitorial/</id>
  5287.    <link href="https://leap.tardate.com/Electronics101/Capacitorial/"/>
  5288.    <updated>2016-06-23T14:50:15Z</updated>
  5289.    <title>#012 Capacitorial</title>
  5290.    <summary>graphing capacitor discharge with Processing</summary>
  5291.    <g:image_link>https://leap.tardate.com/Electronics101/Capacitorial/assets/Capacitorial_build.jpg</g:image_link>
  5292.    <category term="RC"/>
  5293.  </entry>
  5294.  <entry>
  5295.    <id>https://leap.tardate.com/Kinetics/StepperMotors/28BYJ48/X113647StepperLibrary/</id>
  5296.    <link href="https://leap.tardate.com/Kinetics/StepperMotors/28BYJ48/X113647StepperLibrary/"/>
  5297.    <updated>2018-11-04T15:38:01Z</updated>
  5298.    <title>#011 X113647StepperLibrary</title>
  5299.    <summary>a standard Stepper-compatible Arduino library that supports half-stepping the 28BYJ-48 unipolar stepper motor with a ULN2003A/X113647 Stepper Motor Driver Board</summary>
  5300.    <g:image_link>https://leap.tardate.com/Kinetics/StepperMotors/28BYJ48/X113647StepperLibrary/assets/X113647StepperLibrary_build.jpg</g:image_link>
  5301.    <category term="Stepper"/>
  5302.    <category term="Arduino"/>
  5303.  </entry>
  5304.  <entry>
  5305.    <id>https://leap.tardate.com/playground/LightOrNot/</id>
  5306.    <link href="https://leap.tardate.com/playground/LightOrNot/"/>
  5307.    <updated>2016-06-23T14:50:15Z</updated>
  5308.    <title>#010 LightOrNot</title>
  5309.    <summary>uses an LDR to adjust the blink rate of an LED</summary>
  5310.    <g:image_link>https://leap.tardate.com/playground/LightOrNot/assets/LightOrNot_build.jpg</g:image_link>
  5311.    <category term="Sensors"/>
  5312.    <category term="Arduino"/>
  5313.  </entry>
  5314.  <entry>
  5315.    <id>https://leap.tardate.com/playground/Blink/</id>
  5316.    <link href="https://leap.tardate.com/playground/Blink/"/>
  5317.    <updated>2015-03-15T05:44:04Z</updated>
  5318.    <title>#009 Blink</title>
  5319.    <summary>the simplest blinking LED, with some electrical measurements thrown in</summary>
  5320.    <g:image_link>https://leap.tardate.com/playground/Blink/assets/Blink_build.jpg</g:image_link>
  5321.    <category term="LED"/>
  5322.    <category term="Arduino"/>
  5323.  </entry>
  5324.  <entry>
  5325.    <id>https://leap.tardate.com/LEDArrayDemos/RGBCalibrate/</id>
  5326.    <link href="https://leap.tardate.com/LEDArrayDemos/RGBCalibrate/"/>
  5327.    <updated>2016-06-23T14:50:15Z</updated>
  5328.    <title>#008 RGBCalibrate</title>
  5329.    <summary>quick test to make sure LEDs are correctly addressable and their color can be set correctly</summary>
  5330.    <g:image_link>https://leap.tardate.com/LEDArrayDemos/RGBCalibrate/assets/RGBCalibrate_build.jpg</g:image_link>
  5331.    <category term="LED Array"/>
  5332.    <category term="Arduino"/>
  5333.  </entry>
  5334.  <entry>
  5335.    <id>https://leap.tardate.com/LEDArrayDemos/</id>
  5336.    <link href="https://leap.tardate.com/LEDArrayDemos/"/>
  5337.    <updated>2016-06-23T14:50:15Z</updated>
  5338.    <title>#007 LEDArrayDemos</title>
  5339.    <summary>Intro and Setup.. I bought some WS2811-based LED Strips with a specific project in mind. But first, need to get them working...</summary>
  5340.    <g:image_link>https://leap.tardate.com/LEDArrayDemos/assets/LEDArrayDemos_build.jpg</g:image_link>
  5341.    <category term="LED Array"/>
  5342.    <category term="Arduino"/>
  5343.  </entry>
  5344.  <entry>
  5345.    <id>https://leap.tardate.com/playground/BetterWithBacon/</id>
  5346.    <link href="https://leap.tardate.com/playground/BetterWithBacon/"/>
  5347.    <updated>2015-03-15T05:44:04Z</updated>
  5348.    <title>#006 It's Better With Bacon</title>
  5349.    <summary>simple LCD test</summary>
  5350.    <g:image_link>https://leap.tardate.com/playground/BetterWithBacon/assets/BetterWithBacon_build.jpg</g:image_link>
  5351.    <category term="LCD"/>
  5352.    <category term="Arduino"/>
  5353.  </entry>
  5354.  <entry>
  5355.    <id>https://leap.tardate.com/playground/HeartQuotes/</id>
  5356.    <link href="https://leap.tardate.com/playground/HeartQuotes/"/>
  5357.    <updated>2016-06-23T14:50:15Z</updated>
  5358.    <title>#005 HeartQuotes</title>
  5359.    <summary>press a button to get a quote from the net and display on an LCD</summary>
  5360.    <g:image_link>https://leap.tardate.com/playground/HeartQuotes/assets/HeartQuotes_build.jpg</g:image_link>
  5361.    <category term="LCD"/>
  5362.    <category term="Ethernet"/>
  5363.    <category term="Arduino"/>
  5364.  </entry>
  5365.  <entry>
  5366.    <id>https://leap.tardate.com/playground/PushbuttonLED/</id>
  5367.    <link href="https://leap.tardate.com/playground/PushbuttonLED/"/>
  5368.    <updated>2015-09-29T12:03:19Z</updated>
  5369.    <title>#004 Pushbutton LED switch</title>
  5370.    <summary>Momentary push button switch is used to toggle the LED on and off</summary>
  5371.    <g:image_link>https://leap.tardate.com/playground/PushbuttonLED/assets/PushbuttonLED_build.jpg</g:image_link>
  5372.    <category term="LED"/>
  5373.    <category term="Arduino"/>
  5374.  </entry>
  5375.  <entry>
  5376.    <id>https://leap.tardate.com/playground/LedChaser/</id>
  5377.    <link href="https://leap.tardate.com/playground/LedChaser/"/>
  5378.    <updated>2016-06-23T14:50:15Z</updated>
  5379.    <title>#003 LEDChaser</title>
  5380.    <summary>blinks a series of 12 LEDs in a coninuous loop</summary>
  5381.    <g:image_link>https://leap.tardate.com/playground/LedChaser/assets/LedChaser_build.jpg</g:image_link>
  5382.    <category term="LED"/>
  5383.    <category term="Arduino"/>
  5384.  </entry>
  5385.  <entry>
  5386.    <id>https://leap.tardate.com/playground/VariableLED/</id>
  5387.    <link href="https://leap.tardate.com/playground/VariableLED/"/>
  5388.    <updated>2016-06-23T14:50:15Z</updated>
  5389.    <title>#002 Variable LED brightness with PWM</title>
  5390.    <summary>variable resistor is used to control the brightness of an LED with PWM</summary>
  5391.    <g:image_link>https://leap.tardate.com/playground/VariableLED/assets/VariableLED_build.jpg</g:image_link>
  5392.    <category term="LED"/>
  5393.    <category term="Arduino"/>
  5394.  </entry>
  5395.  <entry>
  5396.    <id>https://leap.tardate.com/playground/LED7Segment/DirectDrive/</id>
  5397.    <link href="https://leap.tardate.com/playground/LED7Segment/DirectDrive/"/>
  5398.    <updated>2016-01-26T14:06:56Z</updated>
  5399.    <title>#001 LED7Segment/DirectDrive</title>
  5400.    <summary>test a 7-segment common cathode display</summary>
  5401.    <g:image_link>https://leap.tardate.com/playground/LED7Segment/DirectDrive/assets/DirectDrive_build.jpg</g:image_link>
  5402.    <category term="7-Segment"/>
  5403.    <category term="Arduino"/>
  5404.  </entry>
  5405. </feed>
  5406.  

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