This is a simple Arduino project to allow connecting a PS/2 keyboard to the 16 pin DIP keyboard connector on an Apple II. I've tested it on a ReactiveMicro reproduction Apple II+ RFI logic board and it works great.

All keys are mapped to modern keyboard equivalents and the Apple can be reset with the Ctrl-PrtScrn key combo.

Parts list:

1. Arduino. I used a cheap Arduino Pro Micro clone from Amazon but you could probably adapt to use whatever you have on hand.
2. Female PS/2 connector
3. 2 8-pin male machine pin headers, or some other connector for the DIP-16 socket on the logic board.

Warning: The DIP-16 connector on the logic board does have some pins with higher voltages that will destroy your Arduino if you accidentally connect to them, so take care.