Apple II Keyboard Adapter

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.

Prototype

The Arduino hole pattern is too wide for the DIP-16 socket so I used another PCB to hold the machine pins and then jumpered the Arduino to the pins on top. I also used a pin header to connect to a spare PS/2 connector from an old PC.

It's not so pretty, but it's compact and cost almost nothing.