2 layers51.7 × 75 mm

Relay board
waterloo-rocketry/rlcsv3
Arduino code and electrical schematics for Waterloo Rocketry Remote Launch Control System V3
45 parts5MIT
Boards in 2 GitHub repositories, designed in KiCad, that use the STPS2L25U by STMicroelectronics (1 Independent 25V 2A 450mV@2A 75A 90uA@25V SMB Schottky Diodes ROHS). See how each wires it, with its parts, size, README and files; the STPS2L25U’s symbol, footprint and pinout are on its own page.

waterloo-rocketry/rlcsv3
Arduino code and electrical schematics for Waterloo Rocketry Remote Launch Control System V3

waterloo-rocketry/infrastructure
Ground Side Power Distribution