ok this is a realy noob question but need a circut for a fan controller to that will support me 80-mm led fans. can soem one please help me out i cnat fin any good guides PLEASSE
bit tech to the rescue http://bit-tech.net/article/52/ or is this not what you are looking for... they have basically every type of fan controller possible! cept for maybe thermal
wow thanks for the quick reply that might be all i need, nice work, an again thankyou Edit: yep thats exactly what i needed thankyou very much
i need some more help http://bit-tech.net/article/52/4 can someone tell me if the link above wil work with a potentiometer instead of a rehostat i want to use the first diagram in the link, is i want to use a potentiometer (thats all i can find in tasmania) will i need to adjust the circut at all?
The problem is most potentiometers won't be able to handle the load of a fan. A rheostat can due to how the composition of the two (a pot is a basically a molded resistor, a rheostat is a coiled piece of resistive wire). No matter which nation you're in, it's pretty damn hard to find rheostats of the appropriate size, wattage and resistance without the rape-me-in-the-ass prices. BUT you can follow this guide for using pots for fan control. The regulator used is fairly common, but you'll only be able to turn it up to 10.5v max. For something closer to 12v, see if you can find Mircel's MIC29152BT or MIC2941ABT, and follow the bottom two guides on this page.
Cool. I should have a guide of sorts for my fan controller up soon. Im making it with 7805s (kinda ripping off the zalman FC design) and best of all it only has 4 small components per channel It only reaches around 10.5v max, but to be honest, ive never really noticed much difference in a fan running at 10.5v and one running at 12v.
