EAGLE source
Keyboards & input devices
Tiny Lisp Computer
by technoblogy
A self-contained computer with its own display and keyboard, based on an ATmega328 or ATmega1284, that you can program in Lisp.
by technoblogy
A self-contained computer with its own display and keyboard, based on an ATmega328 or ATmega1284, that you can program in Lisp.

by sparkfun
Microphone with binary output indicating ambient sound, available from SparkFun Electronics.
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