simple python script to aid in cooling the new pi4.
Much of the script has been borrowed from other users online to help me cobble this together.
To power the 5v fan from the raspberry pi and use the GPIO to switch it on and off connect as below (lots more examples online).
Im using a 40mm 2 wire 5v fan (cheapest one on ebay).
I have a 2N2222A NPN Transistor connected between the 5v pin out, ground and GPIO 18 (changeable in the script).
Pin (1) collector to PI GND.
Pin (2) base to GPIO 18.
Pin (3) Emitter to Fan ground.
Fan live to GPIO live.
