2 layers

Calculator
JubilantMarmot/HC-pcbcalc
This is a button matrix schematic that uses RP2040 to connect to GPIO pins in an efficient manner.
57 parts
Open-source boards designed in KiCad by JubilantMarmot on GitHub, from 2 repositories. A board’s address here is its repository’s there.

JubilantMarmot/HC-pcbcalc
This is a button matrix schematic that uses RP2040 to connect to GPIO pins in an efficient manner.

JubilantMarmot/pcc5
This is my first PCB project. It took me around 20 hours. It is a small Linux computer that is the size of a business card. Based off of Allwinner F1C200s.