Heavy duty cooling

[JoeDaddy]

I've just bought two fans for my case. I plan on putting one on the front for intake thru my radiator, and the second in the rear that will exhaust any heat out. Here are the fans

My model is 5915PC-12T-B30-A00
I understand that these are 115V, but that doesn't pose a problem.
Any ideas on how to connect these to my computer?

 

[jsbush]

Well you would need and external power source.

 

[JoeDaddy]

Heres my idea. I've got an extra burnt up P/S. I figured I could take the connector that you plug the power cable into and connect the internal wire to the power leads of the fans. And then mount that P/S connector to the rear of my case and then just plug it into the wall. But I would have to have some type of switch, cause I don't won't them running 24/7 and I would rather not have to reach around and unplug them everytime I shut my computer down. Think that will work?

 

[jsbush]

It would work but you would need to be pretty good to do a good job and not blow anything up.

 

[BenRosey]

I'm not an EE, but won't pushing 120 V through the 115 V fan burn it out eventually? You may want to look into that. Either that or call me names for being a moron, since I'm not exactly sure.

 

[HumblePie]

All I have to say is those sure look like loud fans based on the dba rating... I hope you bought some earplugs to go along with those.

 

[Supradude]

to power up an atx PSU, you can connect the 6th pin (grren) wire to any of the ground (black) wires... for reference check the guide at virtualhideout.net, then you can add a switch so you can turn it on and off... if all else, AT psu's are pretty cheap and they already have an external switch, very handy for 2nd PSU setups...

 

[ArkAoss]

hmm yeah, rip it off rig a switch, and maybe a fuse rig, if you got an at psu, just find where the ac-dc begins converting and remove that part of the psu guts, and then go to town take advantage of the fuse area, and the fan in the psu, its just an idea, im a little light headed right now

 

[wyvrn]

I'm not an EE, but won't pushing 120 V through the 115 V fan burn it out eventually? You may want to look into that. Either that or call me names for being a moron, since I'm not exactly sure.

You are not a moron. But the output of a socket can be from 105-125V. I think that 120V and 115V are used interchangeably and mean the same thing. Now 150V would be a problem.

 

[Zedfu]

JoeDaddy,
i got a suggestion here: how about using relays? although you gotta do a little soldering, it'll be worth considering, since it will turn on and off the fan automatically whenever the pc's turned on.
caution JoeDaddy, BE CAREFUL! you won't wanna short any circuit out. good luck!

 

[JoeDaddy]

Yeah tell me about it. I blew the breaker today at work messing around with these fans. All I have to say is DAMN!!!!!! yes they are loud, but talk about some air. 220CFMs!!! I've hooked up an old AT switch to the wall outlet, and then i'm running the other two wires to the postive and negative on the fan. I tried it out this afternoon and the switch works. Now all I have to do is figure out how much insulalted wire I need. Any ideas of using a rheostat on a 115v line?

 

[fast_eddie]

JoeDaddy:
There is NO 'positive' and 'negative' on an AC fan! AC means alternating current. Those wires are 'hot' and 'common'.
As far as a 'rheostat' goes; not as simple as with a DC brushless fan! Varying the speed of an AC motor can get somewhat complicated (I am not an EE, so I am not even going to try to explain "delta" of AC 'phasing'.).

Variable speed AC motors [typically hand held power tools) are designed to be variable. Multiple speed AC motors (i.e. room air circulation fans, usually 2 or 3 speeds) typically have different windings for the speeds. The only thing that MIGHT be of some use to you MAY be a properly sized AC light dimmer, but you will find that the difference in the speeds you want are not going to be satisfactory for your purposes.

Spend the money on DC brushless fans that are intended for PCs; it's gonna be a lot easier to deal with.

 

[KouklatheCat]

Wyvrn,

You are correct. I know this from having been an electricians apprectice. Also my grandfather was an electrician for twenty someodd years.

 

[Zipperhead]

pics of relay wired up-click on dist-blk

just finished this case.

Zip

 

[JoeDaddy]

Fast eddie:
I would spend the money on some fans that were made for a computer, if you can point me to a fan that pushes 220 cfm's that is made for a computer. I got these fans brand new for only $5 so thats a damn good deal if I can get them to work.

Thanks for the input everyone and bump up.

[EDIT]
I've been corrected.
Here is a nice fan for only $9
[/EDIT]

 

[fast_eddie]

JoeDaddy;
there you go, a 12v fan. At 2.26A, how are you planning to power it? When you mentioned a 'radiator', would I be correct in assuming that you are using a Peltier setup for cooling? If so you probably already have a 2nd PS.

 

[JoeDaddy]

Well another reason i wante to use the 115v fans is so that I can just plug the fan, and water pump right into the wall. I figured that a 450watt P/S should handle me 2 hard drives, 2 cdroms, and the pelitier. Would I need more?