I have a big box of scrapped GOOD computer fans, pulled from old servers and workstations I collected over the years. MOST ALL of them are 3-wire, red-yellow-black, and labeled "BRUSHLESS 12V" on the stickers. Normally for something so simple, I hook up red & black DC voltage and MAYBE a SWITCH, the…

Is there a cheap 3-wire "brushless" computer fan board?

MarkT October 13, 2017, 7:29pm 7

As far as I know all DC computer fans are brushless. That's why the fan spins freely when powered off.
They have built-in controllers.

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