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Old 02-18-2010, 08:53 AM   #1
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Default PC fan canI hook it up to a battery?

I have some extra PC fans and would like to use them in my mini greenhouse for gardening. Can you hook them up to a battery? Is so please explain.

Thanks

Dono
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Old 02-18-2010, 09:04 AM   #2
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Default Re: PC fan canI hook it up to a battery?

Yea sure.

Use a 12V Leisure Battery or car battery.

Preferably a 12V source as anything less would mean a slower fan but usually 5V-7V is required to get them turning.
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Old 02-18-2010, 09:13 AM   #3
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Default Re: PC fan canI hook it up to a battery?

Thanks Remeniz for the fast reply, now that's service.

It's 3 wire system obviously how would I ground it, just to anything metal around not sure on that.
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Old 02-18-2010, 09:17 AM   #4
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Default Re: PC fan canI hook it up to a battery?

The 3 wires on a computer fan are...

Red - 12VDC
Black - 0V
Yellow - Sense


Basically ignore the yellow lead completely unless you use it to monitor the speed of the fan.

We are talking about cooling fans for computers and not another type of fan?
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Old 02-18-2010, 09:32 AM   #5
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Default Re: PC fan canI hook it up to a battery?

Quote:
Originally Posted by Remeniz View Post
The 3 wires on a computer fan are...

Red - 12VDC
Black - 0V
Yellow - Sense


Basically ignore the yellow lead completely unless you use it to monitor the speed of the fan.

We are talking about cooling fans for computers and not another type of fan?
Yes PC fan out of an Alienware. So forget the yellow thanks.

It says on the fan Black - Red + Yellow F.G. I thought that might mean ground.
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Old 02-18-2010, 09:34 AM   #6
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Default Re: PC fan canI hook it up to a battery?

Quote:
Originally Posted by gixxerific View Post
Yes PC fan out of an Alienware. So forget the yellow thanks.
Sweet. Let us know how you get on.

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Old 02-18-2010, 12:49 PM   #7
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Thumbs up Re: PC fan canI hook it up to a battery?

Cool no prob I figured it would work just thought I would ask before I cut the wires. If I need it again I can solder it together or connect it back together another way. Now I'm gonna have to break into my other junk PC. Oh yeah I just have it hooked to 9 volt for now, just testing it out.

Thanks

Dono


It's even has lights.
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Old 02-18-2010, 07:23 PM   #8
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Default Re: PC fan canI hook it up to a battery?

Why not use a 12V AC adapter from some old electronic?

It'll help you save on batteries.
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Old 02-18-2010, 07:30 PM   #9
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Default Re: PC fan canI hook it up to a battery?

foothead I already did, but thanks. Yeah the battery didn't last very long. I have it all figured out thanks again everyone.
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Old 02-18-2010, 09:41 PM   #10
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Default Re: PC fan canI hook it up to a battery?

haha ok.

Just curious... why not go buy a $5 fan at walley world?
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