keytee -- Controller breakout board for small keyboards Keytee is based on the ATMEGA32U2 controller. With its 20 usable I/O pins, it can drive keyboards with up to 100 keys. The PCB is intended to sit between the switches of a mechanical keyboard, not adding any bulk; cf. http://imgur.com/v3vOg1i. ./pcb/ contains the hardware design as a KiCAD project. TMK-based ./firmware/ defines a 10-row, 10-column keymap with a total of 10 keys that exercise all the hardware pins. It is meant for hardware testing and should probably adapted to any specific requirements. Generated bootloaders, firmware, Gerber files, etc. can be found at https://trebb.github.io/keytee. https://deskthority.net/workshop-f7/keytee-controller-breakout-board-for-small-keyboards-t15586.html