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Wiring multiple fans to a wall outlet?

post #1 of 11
Thread Starter 
So here's the deal, I have a not very large window and I've tried out a few made for fans. They fit OK, but the air they move sucks and they're ridiculously loud.

I am right now going to go buy some large case fans (I think they're 230 or 240). They're much quieter and they move more air. My thought is to mount them to a wood panel, use some stockings as filters, hook them all up and then wall power the thing.

I was recommended USB, but at 5V the fans are unlikely to move that much air.

What I would like to do is put all the fans in parallel, have some sort of resistor knob, and wire it all to a wall outlet using an ac120 to dc12v converter plug thing. I have no idea where to really start, I'm going to jump in head first and hope for the best, ideally not ruining any of the fans on the way.

If anyone has some advice, it would be very much appreciated. I can of course convert the fans to molex and I could short a PSU, but that would take a bit much space.
post #2 of 11
See if you can find a 12v power brick on ebay or amazon (the kind for a monitor or similar) with enough current to run all the fans, then cut off the end and attach whatever connector you'd like.
    
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by zerocool135 View Post

See if you can find a 12v power brick on ebay or amazon (the kind for a monitor or similar) with enough current to run all the fans, then cut off the end and attach whatever connector you'd like.
I was hoping to find done in a store, but they want 40 cad.

Got two fans. Got some wood. Just need the 12v and and variable resistor. I used to have a molex based one, but I can't find it
post #4 of 11
I was trying to find a better power supply for my qnix monitor and when i was looking on ebay they had the 12v one for like 5 us. So even if you need to wait a few days i think it would be worth the savings. But that's just me. Good luck in your search.
    
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post #5 of 11
Thread Starter 
Yeah, I'm likely to just wire two fans for now. I may redo the whole project with four if I don't find it to be enough. I went with the Spectre 230mm units. They move a lot of air while being pretty quiet, so I don't even need a voltage regulator or anything.
post #6 of 11
So the window size is about 25 x 50 cm ?
post #7 of 11
Thread Starter 
Quote:
Originally Posted by RnRollie View Post

So the window size is about 25 x 50 cm ?
No it's more like 60x50cm. I'm going to start off with two fans and see how it goes. If I like it, I might add two more.

I've ordered the PSU I need. Coming from China, so it's probably take a while, but it has a removable power cable, so I can mount the PSU with the fans instead of having a power block plug.

Still need to order a power switch though
post #8 of 11
They move a lot of air while being pretty quiet, so I don't even need a voltage regulator or anything59.gif
post #9 of 11
Thread Starter 
Quote:
Originally Posted by lupathkep View Post

They move a lot of air while being pretty quiet, so I don't even need a voltage regulator or anything59.gif
They are pretty quiet, but still louder than my desktop, so I will likely add a little pot to it so I can fine tune it for volume. I just want to find one with a nice large dial rather than having to get out a little screw driver every time.
post #10 of 11
I have purchased external fan controllers that have their own wall transformer. I use a couple of these http://www.amazon.com/Silenx-IXAFCEX-Channel-External-Controlle/dp/B0030EZLSO to run 120mm fans I have mounted on top of NAS servers to pull the heat out of the units.
   
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