Reduce 12v to 9v or 5v
December 22, 2012 9:26 AM Subscribe
How can I control/reduce the amount of power from a 12v battery?
posted by powpow to Technology (6 answers total) 1 user marked this as a favorite
I have a 12v battery that powers small fans in a camper. Depending on how cold it is, I'd like to be able to reduce power to the fans so they don't move as much air.
Fans are cheapo computer fans, so there's no controller that I'm aware of (actually I snipped off the extra wires, which are probably how they'd be controlled if used in a computer).
I'm looking for something cheap and easy since my technical skills are pretty limited. I can splice a wire, but that's about it.
I'm imagining something like a model railroad controller perhaps, but I don't even know if that will do the trick. Can I just walk into Radio Shack and get something that does this?