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Can you power a 12v case fan with a 9v battery? Answered

If you can't, then where can you find a 12v battery connector ? I looked everywhere and couldn't find it.
BTW, I am trying to build this https://www.instructables.com/id/Simple-Bots-Scrub/?


2 Replies

AndyGadgetBest Answer (author)2011-01-21

No problem at all - The Instructable is using 'computer fans' which would normally be powered off the 12V line of a PC, so that's what the author's doing.
Some fans have an extra wire which would be used for speed sensing. If yours have, just ignore it.

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Prfesser (author)2011-01-21

Many small DC motors will run on less than the rated voltage, though not as fast nor with as much torque. I have a 180VDC motor that would turn when connected to a 12v car battery. Hook up the motor temporarily with a 9v battery and a couple of wires. If it spins fast enough for the application, go for it.

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