(Potentially, this can damage your system or cause system crash. In terminal type sudo sensors-detect and answer YES to all YES/no questions. Install the lm-sensors and fancontrol packages. If it does, but the software (aka kernel) doesn't know how to control it, you are without luck. If your hardware doesn't support fan speed controls, or doesn't show them to the OS, it is very likely that you could not use this solution. ** Not difficult either, although the author there apparently never took the final step his Ard speed-controls a fan and monitors temperature, but doesn't actually vary the fan speed according to temperature.This functionality depends on both your hardware and software. * Edit - added: Well, that wasn't hard to find. At the very least it needs a couple of hard switches like 'all fans on full, now' that don't depend on code running in your host. Personally though I'd prefer an independent display and keypad the way the DigiDoc 5 had.

I don't know exactly how the 4-wire PWM fans are controlled, though.* PWMing a standard fan might be a little 'interesting' due to interactions with the commutator circuit inside the fan.** I suspect the fourth wire on the PWM fan is another input to the commutator circuit, leveraging the switching transistors that are already there.Ī control program permitting you to design your own speed-vs-temperature curves wouldn't be exactly trivial, but there's nothing really tough about it. shows up as a USB-to-serial adapter so you don't need a custom driver for it either. Today you could use an Arduino for the job. I believe I added my name to the list, saying I'd write the driver for it (someone else would be doing the UI program). Click to expand.Quite a while ago some people here were proposing building a USB-commanded very smart fan controller/temperature monitor that could do such things.

Control case fan