I'm new to Pi and I have a compute module 4 IO board with CM4. I would like to be able to control five 4pin fans but I don't seem to find any video or documentation that shows how to do this. The closest thing I find is recommendations on using a PCA9685 16-Channel 12-Bit PWM Servo Driver but these all seem to be 3-pin outputs. Anyone power multiple PMW 4-pin fans with Pi 4? If so how did you wire it.
Statistics: Posted by TinkerTito — Sat Jan 17, 2026 6:19 pm — Replies 0 — Views 6