Samuel Stephenson aka shadowfoil shared his Quill, a nice open-source macropad.
The "Quill" is a 3 key, 2 encoder hot-swappable macropad shield utilizing an RP2040-Zero MCU board as a controller.
I wanted to take my first steps into designing a mechanical keyboard from scratch so I threw this build together over the last few weeks. I was inspired by the RP2040-Zero used by Timception in his Majin Drift which I just picked up but wanted to start simpler and work out how all the parts came together from PCB design through firmware compilation and 3D design for a case – shadowfoil.
All PCB/Schematic and 3D CAD drawings are available for the PCB as well as two cases that can be printed, machined, or laser cut from various materials.