PWM Fan Control without AHRS Board

[ghost]

Hello all,

could anyone please help me how I have to adapt the code in order to get the PWM fan control working? I would rather not connect the 5V fan directly to the 5V and ground pin so that the fan does not run at full speed all the time. Instead I used this layout using a diode, transistor and resistor to control the fan speed depending on the temperature (see image and link below). The code is also provided, but given my limited coding capabilities, I can't figure out where and how to implement it in the code.

Thanks so much!

https://www.instructables.com/PWM-Regulated-Fan-Based-on-CPU-Temperature-for-Ras/

[JNSwanson]

You need to use GPIO18 for the PWM not GPIO21, then it should work fine.