PWM Signal Generator for Fan Control?

Discussion in 'Overclocking & Cooling' started by Zarathustra[H], Aug 14, 2016.

  1. Zarathustra[H]

    Zarathustra[H] Official Forum Curmudgeon

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    Hey,

    I am working on a project in which I need to be able to manually control pwm signals for fan control.

    There used to be a device for PC's that did this, the Zalman PWM Mate, but they must have discontinued it, as I can't find it on Amazon, Newegg or eBay...

    Does anyone know of a current device that can do this? There are a lot of cheap PWM signal generator boards on eBay, but I have gathered that now all PWM is the same, and I need one with the frequency range that the PC fan specification uses. Does anyone know how to select one that might work?

    Thanks,
    Matt
     
  2. unrlmth

    unrlmth Limp Gawd

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    auntjemima likes this.
  3. Zarathustra[H]

    Zarathustra[H] Official Forum Curmudgeon

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    That is a very good suggestion.

    I found a writeup over at the OCF about this very thing.

    Still struggling to understand the qualitative difference between their 555 and 556 (dual 555 design) though.

    I'm not a stranger to soldering irons, but I usually only use them to splice wires. I've never tackled circuits.
     
  4. InvisiBill

    InvisiBill 2[H]4U

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    From Building PWM Controller for 4 wires PWM fan | Overclockers Forums
     
  5. Zarathustra[H]

    Zarathustra[H] Official Forum Curmudgeon

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  6. Eldata

    Eldata Limp Gawd

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    I know of a device, around the size of the PWM Mate, that will allow you to reduce the specified idle RPM (and noise) of high speed PWM fans without affecting the maximum RPM.