I researched on which components are best for a split keyboard, and made Decisions on how the final design will look :

What i’ve decided :

• The Keyboard will be completely wireless

• It will be split in two symmetrical halves (split keyboard, duh)

• It will use a Supermini nrf52840 microcontroller for both halves

• It will follow the standard Corne layout instead of a bigger one - Corne layout means 3x6 switch matrix with 3 thumb keys per half, which means it will have 42 total keys

• It will use a 110 mAh battery instead of 600, as otherwise it would’nt fit under the microcontroller, and the case could’nt be as low-profile as i want

• It will have 2 OLED’s - most probably one for layers (im a kb warrior) and one for battery level/connectivity

• I decided against backlighting as it causes HUGE battery drain, and my microcontroller is cheap, but the tradeoff is a bigger battery consumption

• im havent decided if i will use the official Cherry mx switches which are expensive (dollar per key) or cheap ones (0.30cts a key)

• I will use 1 reversible PCB instead of a breakoff pcb that u split down the middle with mousebites

Next steps :

• I will have to first find footprints and symbols for all the components - all i found till now is the symbol and footprint for microcontroller
• Then i will make my Schematic with all components, then arrange and wire the PCB
• Then i will depending on my final PCB, I will make a case according to how i want it to feel and how low/high profile it should be, how thick, mounting method, etc.