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New Project! Circuit Python Keyboard Emulator

Learning Guide: Arcade Button Controller Box

When this box is connected to your computer, it behaves like a USB HID Keyboard. Press a button and it types a letter! It’s really simple and easy to manipulate the code so you can output single characters or string multiple characters together to execute commands! The LEDs also light up each time you press a button.

If you remember the Desk Of LadyAda stream on May 23, 2017 you may remember this project. Phil originally wanted a way to switch between scenes in WireCast using a custom trigger controller. Limor had the idea to prototype this using Circuit Python and an Adafruit Feather M0 Express.

Circuit Python Keyboard Emulator

You can watch Limor walkthrough the development of the software and explain how everything works. The CircuitPython HID Keyboard library is by Dan Halbert and Scott Shawcroft.

I designed a simple enclosure to house a few 24mm arcade buttons (with built-in LEDs!) and the Adafruit Feather M0 Express. I made a few different layouts, ie. two by two, three by two, four by four, etc. It’s parametrically driven so it’s really easy to make custom layouts. I put together a Layer by Layer tutorial that demos how it works. I think it’s pretty neat. Hope you find it useful for your projects.


Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.

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