Frankenkorg RK-100 brain replacement
This Arduino sketch implements a new brain for a Korg RK-100 MIDI keytar. See http://www.cassettepunk.com for details.
WARNING: Klaatu barada necktie -- I made this Fritzing diagram after I built the protoboard, more or less from memory.
One known errata is that it doesn't include pull-up resistors on the data bus (Arduino pins 21-28). You can get by without
these by modifying the sketch to set internal pull-ups on these pins in the
I'd strongly suggest understanding the circuit rather than taking it literally, as I haven't double-checked it.
Reliable and usable.
- Improve behavior of state changes (e.g. octave shifts, program changes) when keys are pressed. Currently they will remain pressed.