r/techsupportmacgyver • u/Akachi-sonne • 2d ago

esp32 fan speed controller

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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.

75 Upvotes

94% Upvoted

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5

u/PianoTrumpetMax 2d ago

is this kind of like using a 5090 as plex transcoder? I mean I know they’re cheap so why not, but as I just have gotten into home hobby electronics and tech, this struck me as kinda funny in a “good overkill” way lol

1

u/Akachi-sonne 1d ago

Oh absolutely lol. I’m not even using any of the wireless components. It’s really simple and crude firmware too. But, i had one laying around lol

1

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1

u/thiagosanches 1d ago

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

1

u/Akachi-sonne 17h 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

1

u/ciocolata69 22h ago

Stroke of genius, gonna do this too, thanks!