I Built a PWM Fan Controller From Scratch!

[@OldPoi77]

It would be nice to have them controllable over WiFi so it could be connected to a Pi weather station and ramp the fans up on hotter days for use in an Avery or a Vivarium or even dog kennels.

[@circuitrewind]

Maybe... just maybe... a v2 is already in the works, and the parts even arrived before I recorded this video ;)

[@SurenCao]

New video for dual GPU on AGP expansion running Doom, to run all the Dooms.

[@circuitrewind]

Now THAT'S an interesting thought! I could run multiple AGP cards on the same system. ;)

[@nikos9742]

This is great ! Bien joué ! Have you thought using either a temp sensor and/or programmable fan curve ?

[@circuitrewind]

I just got a package of thermal probes in the mail from China a couple days ago. I'm exploring the possibilities. :)

[@aayush212]

Very nice video but couldn't get much on how to build the circuit and also build custom controller to control rgb or argb fan ? I have argb fan in my pc but I have only rgb pin on my motherboard 😅. So if you have any idea what can I do then please tell me.

[@circuitrewind]

The files for this project are linked in the description. I do have other projects in that same github for controlling ARGB LEDs. The lights and the fan are controlled independently even though they're the "same device"

[@LimbaZero]

Usually those power supplies have temperature/load controlled fans. Maybe cheap/dummy ones have just direct 12V for fan. At least all lab psu:s what I have have temp controlled fans. I think you are not using full load then maybe downsizing cooling is fine. It's pretty nasty if it's cheaply designed transformer and when melting it kill all connected devices. Usually driving circuit run hotter and will cause thermal shutdown before transformer melting.

[@circuitrewind]

If you're talking about the 12v power delivery in my entertainment center, no, that did not have a thermal controlled fan inside of it. It is designed for 24/7 security camera operation, which I'm not using it for. It thus has a static 2-pin DC fan running at full speed. This is a very common thing on devices, most devices I modify use 2-pin DC fans, which is why I'm in the process of replacing them. Now, if we're talking about PC power supplies, its actually a relatively recent addition to have PWM control in them (the past decade or so). A lot of the stuff I'm playing with is quite a bit older that I'm retrofitting for modern features.