Keyboard Controller Board for HHKB pro2 - KiCad project
This controller makes your HHKB fully programmable. You can use this with tmk_keyboard firmware. This will fit HHKB Pro2, Type-S and JP.
You can buy assembled board here. https://geekhack.org/index.php?topic=71517.0
141.50x36.00mm(1.6mm thick)
TBD