TMK Keyboard Converter PCB with Mini DIN connector
This converts pre-modern keyboard protocols into modern USB using TMK Keyboard Firmware Collection.
You can buy assembled converter here. https://geekhack.org/index.php?topic=72052.0
Updates
2016/07/03 Rev 2.4 Changed foot print of USB microB and Xtal 2015/09/29 Rev 2.2 Changed LED footprint
Supported Protocols
See this for supported protocols.
PS/2(ScanCode Set 2)
MiniDIN 6P
Apple Desktop Bus
MiniDIN 4P
Sharp X68000
MiniDIN 7P
Sun Type3-5
MiniDIN 8P
NEC PC98
MiniDIN 8P
NeXT
MiniDIN 5P
Schematics
PCB Revisions
PCB rev1
Rev1 has lands for MiniDIN and IO pads for other interface than MiniDIN. With wire jumpers it can support many protocols. It uses Atmel AVR ATmega32U4.
PCB rev2
Rev2 is smaller and supports only protocols which uses MiniDIN connector and can be configured with solder jumpers on bottom of the board. It uses Atmel AVR ATmega32U2.
PCB rev2.1
Fixed misaligned pins of Mini DIN connector, clearance of solder mask and silk prints.