In this video, we will build a variable speed fan for a Raspberry Pi. It measures the CPU temperature and adjusts its speed automatically to keep the temperature constant. We also will learn a few things about Pulse Width Modulation (PWM), PID controllers, MOSFET transistors, and even a little bit of magic.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!