Github EAGLE-CAD Source https://github.com/Tecsmith/arduino-fan-control/tree/master/EAGLE Github PlatformIO Source https://github.com/Tecsmith/arduino-fan-control ...
There are several PWM controlled cooling fans avaliable for the Raspberry Pis prior to the Pi 5, that are connected via the Pi's GPIO header. Examples are the Argon mini-fan, HighPi Pro Fan or ...