Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!
jimmsch said:I have these pics of the different voltage wirings printed and tacked to the wall in my garage where I do all my PC building/testing/money wasting stuff. Great guide!!
Oc1Kenube said:Could you post me a 5v mod please delta is still a tad too loud
nd4spdbh2 said:its very simple... take the 5v (red) line off the psu and put it to the + on the fan, then the - on the fan to a black or ground on the psu.
It's not going one way. The 12v is pushing in one "direction" if you will, and the 5v is pushing in the opposite direction. So the first 5v of the 12v line are canceled out leaving only 7v remaining. Now that is in no way what I would consider an accurate technical explanation, but it does make the point in an easy to understand manner.How is it that you can have one wire going to +12v and one wire to +5V and get 7v? Why do these take away instead of adding up?
And how is it that when you switch the black ground wire away from the ground and into the 5v that this works at all now that the ground is no longer there?
It would seem to me that the two voltages would buck and burn things out if this was to work at all. This is DC so I would think that since everything is going one way that it wouldnt work.
Thank you for trying to explain it.
But where is the ground? I don't understand how this completes the circuit without a ground.
I am wondering how it is possible to use a wire to output voltage and current and yet still perform the job of a return.
Very interesting stuff!
this is an easy way to do it yes, but if somone has a bit of knowledge in electronics you can easily set up a NE555 timer as a PWM modulator with a transistor and controll your fan speeds very acurately. If anyone is interested let me know and ill post the information. PWM (pulse width modulation) is very acurate and can run a fans speed slower than a voltage modification, because the PWM controller runs the fan at its desired voltage the fan will start at very low speeds.