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Question About An External Fan Mod.


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#1 beauchampy

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Posted 06 May 2008 - 05:00 PM

I was thinking about making a mod for an external fan that is attached to the bottom plastic grill, blowing air into the 360. Got a few basic questions.

My idea is to use two 80mm PC fans, attached to the grill and powered by the USB port.

I know that USB is 5v - so is it possible to power these fans using that (standard 12v fans), or would the low voltage be an issue? Should I wire the fans in series or parallel? I wasn't too good at electronics in school.

I know it would be much better to use the 12v source on the motherboard but I'd like to be able to do this without voiding the warranty..

Any idea's/ suggestions greatly appreciated.

Oh and I could use both the front USB ports (5v a piece I'm guessing) because I only use wireless controllers anyway...



#2 MickRaider

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Posted 06 May 2008 - 05:07 PM

Yes 5v would work and you'd wire them in parallel. You can also splice into the PSU line to get 12v, this won't void your warranty.



#3 beauchampy

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Posted 06 May 2008 - 05:14 PM

Cool. Would it make any difference if I used LED fans over regular fans? I guess the extra power consumption would be nominal.

#4 MickRaider

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Posted 06 May 2008 - 05:25 PM

QUOTE(beauchampy @ May 6 2008, 11:50 AM) View Post

Cool. Would it make any difference if I used LED fans over regular fans? I guess the extra power consumption would be nominal.
Shouldn't make any difference except the led's might not work since it's expecting a 12v power source.

#5 beauchampy

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Posted 06 May 2008 - 05:33 PM

Cool.

One more thought. Would it be possible to combine two ports to make 10v?



#6 MickRaider

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Posted 06 May 2008 - 06:14 PM

QUOTE(beauchampy @ May 6 2008, 12:09 PM) View Post

Cool.

One more thought. Would it be possible to combine two ports to make 10v?
No.

#7 beauchampy

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Posted 06 May 2008 - 06:41 PM

Ahh ok, thanks MickRaider! You've been most helpful.




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