Fan Question (Help Quick!)

GTVDispatch · #1 (**permalink**) 01-11-2007, 03:41 AM

I'm about to move up to school, so my access to tools is going to dissapear. I have these fan. (2).. http://www.newegg.com/Product/Product.a ... 6835150007

and this controller... http://www.newegg.com/Product/Product.a ... 6813999506

coming in the mail via overnight. It's to ventiate a custom enclosure, seen in the post New Habitat (Pictures).

I'm assuming I can treat the cord from the controller like mike instructed on his DIY page and just snip the connector off and attach it to a power supply. What output am I looking for to do this?

Anyone who can help plz do, as time is running out to finish this beast.

zBrinks · #2 (**permalink**) 01-11-2007, 04:24 AM

There's a review on the page that you linked to your fan desc. that shows rpms to voltages. Id think you'd just multiply number of fans by the voltage you want for desired rpms, but Im no electrician. Im sure Mike will chime in.

defaced · #3 (**permalink**) 01-11-2007, 03:37 PM

Ignore the voltage & RMP stuff in that review. You're using a fan controller so that info doesn't apply to you. That's for someone who's trying to slow down the fan using a constant 12vDC supply.

The fan controller says it can supply 18 watts per channel and there are three channels. So in order to be able to use all of that power you're going to need a power supply that can supply at least 5 amps @ 12vDC (which is hard to find). BUT, there's a catch, you're not likely going to need all of that power but the fan page doesn't spec its current usage, and the pic doesn't show it on the fan itself, so I can't answer the question. You may find that the fan controller won't work unless it's running from a computer power supply because it needs the +12v and the +5v lines to run. I'm pretty sure mine are this way.

For mine, I went to CompUSA and picked up an elcheapo AT power supply (NOT an ATX power supply) and used it for my fans. This is the one: http://www.compusa.com/products/prod...T_Power_Supply

GTVDispatch · #4 (**permalink**) 01-13-2007, 02:10 AM

Why not ATX?

defaced · #5 (**permalink**) 01-13-2007, 02:15 AM

You have to make it think it's plugged into a board to get it to work. I don't know the details on how to do it, but it's simple. The reason I capped "not" in my last post was because I wanted to emphasize that I didn't get an ATX supply in case you went to the store and picked one up. AT supplies come with a power switch to turn the thing on, so out of the box I didn't have to do anything to get it to work.