![]() ![]() These buttons were laid out in a row/column matrix, so needed to decode this matrix before sending the result to an Arduino for processing.Ī 74HN595 shift register was used to read the 8 rows of buttons underneath the keys, while the rows were tied to different input pins on the ‘duino. ![]() After tearing out the guts of the keyboard, the only thing that remained is the row of push buttons underneath the keys. The keyboard used was a simple Casio keyboard with built-in voices. ![]() decided to take one of these toy keyboards and build a MIDI keyboard. Building a MIDI device is always a great microcontroller project, and nearly everyone has an old toy keyboard lying around in the back of a closet or in the basement. ![]()
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