4 layers54.6 × 61 mm

SapphineMinimal
ChrisHayward-dev/SapphireKicad
See the LastProduction branch for the most current revision
159 parts
Boards in 3 GitHub repositories, designed in KiCad, that use the RMCF0603FT20K0 by Stackpole Electronics (SEI) (-55℃~+155℃ 100mW 20kΩ 75V Thick Film Resistor ±1% ±100ppm/℃ 0603 Chip Resistor - Surface Mount ROHS). See how each wires it, with its parts, size, README and files; the RMCF0603FT20K0’s symbol, footprint and pinout are on its own page.

ChrisHayward-dev/SapphireKicad
See the LastProduction branch for the most current revision

INTenX/test-controller-carrier-esp32
Carrier Board for ESP32-S3-DevKitC-1 that includes a 4 channel DAC and 8 channel ADC external expansion, as well power routing / monitoring.

oresat/oresat-gps-hardware
Hardware for OreSat's SDR GPS receive and other SDR GPS projects