![]() Raspberry Pi Fan Control Hardware SetupĪs outlined in the video below, if you’re using a PWM fan, all you have to do for control is connect its power lead to one of the Pi’s 5V pins, ground to ground, and the PWM lead to the appropriate GPIO pin. This article covers simple on/off fan control, and variable speed fan PWM fan control is outlined in this separate post. 2-wire fans, or more advanced coolers like the ICE Tower, will need a transistor for control, but PWM fans, such as this 5V Noctua NF-A8, have the necessary components built-in. Raspberry Pi OS has functionality built-in to switch the fan on and off based on temperature. ![]() ![]() Either is slightly wasteful power-wise, and potentially annoying. To run a simple 2-wire fan continuously, connect it to the 5V and ground pins, or you can instead hook it up to 3.3V for lower speed and noise. The Raspberry Pi’s GPIO pins don’t supply enough current to power even a small fan, but there are several ways to power and control a fan with the Pi. While passive cooling options are often good enough to avoid overheating and thermal throttling, at some point you’ll need to think about using a cooling fan. As you probably know, Raspberry Pi single-board computers, especially Pi 4 models, can get quite hot. ![]()
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