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possible to connect fans via USB?

Posted on 2005-03-10
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Last Modified: 2013-11-10
Total nerd project for hardware rookie. I have 2 cooling fans scavenged from dead PC's. I'd like to connect them to new PC via USB so I can feel the wind thru my thinning hair as I'm chained to my desk. Can I do it cheaper than what I could I buy?

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Question by:christiandillon
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Expert Comment

by:Callandor
ID: 13505507
That is indeed a nerdy project - they sell those things, you know: http://www.kensington.com/html/1265.html

The limitations are 5v and a small amount of current, so don't hook up a monster wind tunnel to it.
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LVL 69

Expert Comment

by:Callandor
ID: 13505551
If your scavenged fans are case fans, they need 12v, so they probably won't spin very fast, if at all.
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Author Comment

by:christiandillon
ID: 13505556
Yeah, I just hate to throw these fans out if I can leverage them to increase my nerd factor. My question is really *how* to connect them, how to wire it up?
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by:christiandillon
ID: 13505628
They are 12v. 80mm.
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Callandor earned 1600 total points
ID: 13505742
Here's the pinouts of USB ports: http://www.tek-tips.com/viewthread.cfm?qid=1005674&page=1

You basically get power from the 5v and ground connectors, but as I said before, running a fan rated for 12v with 5v will mean it will spin very slowly, if at all.
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Assisted Solution

by:JohnnyCanuck
JohnnyCanuck earned 400 total points
ID: 13507482
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Author Comment

by:christiandillon
ID: 13509394
Thanks, nerd curiousity satisfied if nothing else.
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