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Rheostats

post #1 of 18
Thread Starter 
Hi, I was wondering what rheostat I need to control the speed of a 12v fan. Any ideas?
post #2 of 18
you can just get a fan controller. Also it depends on the amount of watts the fan uses. Do you know how many?
    
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post #3 of 18
Thread Starter 
I dont have a clue but it's an only PSU fan and id rather make my own controller, more fun
post #4 of 18
It might be unadvisable for you to make your own...just yet.

Here are some controllers that have the nads to deal with a CPU fan. I did not read all the specs, so check them carefully. You do not want to rob your fan of rpm's.

http://www.pccasegear.com/category18_1.htm

If you really want to make your own, go to RadioShack (or similar store) and get a rheostat/rheobus (knob and coil setup), then mount it the way you want.

Flux
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post #5 of 18
Thread Starter 
Alright thanks, Ill go check it out later.
post #6 of 18
If you want to make your own fan controllers, here's the best site for some designs:

www.cpemma.co.uk/index.html

Rheostats are pretty crude and they have better techniques.
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post #7 of 18
I put a 1k rheostat inline with one of my fans and it worked rather well, tho now Ive tested it I wish I'd used a 5K pot.
    
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post #8 of 18
Thread Starter 
thanks everyone! Bought 5 1k rheostats and can't wait to make my contoller , thanks!
post #9 of 18
Quote:
Originally Posted by F3t1sh View Post
thanks everyone! Bought 5 1k rheostats and can't wait to make my contoller , thanks!
What's the current rating on those rheostats?
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post #10 of 18
Quote:
Originally Posted by DuckieHo View Post
What's the current rating on those rheostats?
Most fans are below 1A, unless hes got some High performance >100CFM fans, he should be fine.
    
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