
HAT+
cvaldess/Rpi3FanHatPlus
Raspberry Pi 5 HAT+: EMC2303 controller for 3 case fans + GNSS (UART/PPS) breakout. KiCad 10, CERN-OHL-S v2.
Boards in 2 GitHub repositories, designed in KiCad, that use the AT24CS64-MAHM-T by Microchip Technology (-40℃~+85℃ 1,000,000 cycles 1.7V~5.5V 100 Years 1MHz 3mA 5ms 64Kbit 6uA 900ns Hardware write protection function、Noise suppression function、Built-in power-on reset (POR) I2C UDFN-8-EP(2x3) EEPROM ROHS). See how each wires it, with its parts, size, README and files; the AT24CS64-MAHM-T’s symbol, footprint and pinout are on its own page.

cvaldess/Rpi3FanHatPlus
Raspberry Pi 5 HAT+: EMC2303 controller for 3 case fans + GNSS (UART/PPS) breakout. KiCad 10, CERN-OHL-S v2.

Digital-Naturalism-Laboratories/Mothbox_Electronics
This is where the electronics for the Mothbox are developed, such as the PCB! It's copied over from https://github.com/Digital-Naturalism-Laboratories/Mothbox/tree/main/Hardware/PCB so you can check that out if you want…