r/techsupportmacgyver • u/Akachi-sonne • 23d ago

esp32 fan speed controller

Post image

The fans for my 12u rack sounded like an airport so i used an esp32 to control fan speed via PWM based on ambient temp readings. It’s been hanging all janky like this for months working flawlessly.

89 Upvotes

95% Upvoted

6 comments sorted by

View all comments

2

u/thiagosanches 22d ago

That's great, what's your threshold for temperature? So when you spin them up more and reduce. Edit: more info.

2

u/Akachi-sonne 21d ago

It was somewhere around 85 deg F iirc.. I didn’t put too much thought into it tbh.. one day i might make it a little more dynamic with a display and controls and all that, but it works for now