Use a computer fan

  mark-pc 15:05 16 Jan 2013
Locked

I want to use some fans from old PC's for another application. Would I need a transformer?

  wiz-king 15:12 16 Jan 2013

Yes. Most likely 12V but check on the fan.

  spuds 15:16 16 Jan 2013

All depends on the voltage and how you want to use the fans, and on what.

You could use batteries, transformer or other correct power supply?.

  mark-pc 21:58 16 Jan 2013

I want to use on a small plant growing setup to disperse the heat from grow lamps. Ideally on mains.

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