2 layers55 × 85 mm

Chess card
Hung-Chi970104/chess_card
Business-card-scale RP2040 and e-paper hardware prototype for a portable chess interface.
70 parts1
KiCad boards from 2 GitHub repositories tagged “hardware-prototype”, the most starred first; open any of them in PCBKit.

Hung-Chi970104/chess_card
Business-card-scale RP2040 and e-paper hardware prototype for a portable chess interface.

Hung-Chi970104/gameboy
Compact RP2040 handheld-console hardware with custom controls, power circuitry, display interface, and fabrication files.

Hung-Chi970104/chess_card
Business-card-scale RP2040 and e-paper hardware prototype for a portable chess interface.