2 layers196 × 104 mmHack ffthack-apollo/hack_spectruma music spectrum use esp32-pico-d4 and ws2812b.611 parts28GPL-3.0
4 layers36 × 48 mmApollo3 moduleTUDSSL/ENGAGESource code repository for ENGAGE: Battery-Free Game Boy44 parts286MIT
2 layers98 × 128 mmENGAGETUDSSL/ENGAGESource code repository for ENGAGE: Battery-Free Game Boy125 parts286MIT