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How long would a 140mm fan run on 8 AA duracell batteries?

post #1 of 17
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How long would a 140mm fan run on 8 AA duracell batteries?

Suppose I hooked up one of these:
http://cgi.ebay.com/1pc-8-x-AA-size-...item3f09fbb3ad

to one of these:
http://cgi.ebay.com/Set-Three-Xigmat...item2311843d9c
Edited by listen to remix - 8/28/11 at 3:31pm
    
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post #2 of 17
you will need to find out what the amp on the batteries and the amp required to run the fan is then you have your answer after some quick working out.
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post #3 of 17
Someone makes a 110v AC adaptor to 12v molex for powering fans through the wall.Cost like $18 bucks.
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post #4 of 17
your fans run at 0.30A so X 3 (the number of fans) 0.9A an hour round it up to 1 Amp a hour the calculate the amps of all your batteries up then you have your battery life

I'd recommend getting two sets of high power rechargable batteries and just rotating them
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post #5 of 17
Quote:
Originally Posted by Redwoodz View Post
Someone makes a 110v AC adaptor to 12v molex for powering fans through the wall.Cost like $18 bucks.
Could be done with $3-5.


OP, 8 batteries would probably be bulker than a tiny unregulated power supply.

$2.70 for a 120v to 12v@1A adapter: http://cgi.ebay.com/Adapter-Converte...item19c5183a83

Replace the jack with two Molex pins and plug.
Edited by DuckieHo - 6/17/11 at 12:07pm
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post #6 of 17
http://cgi.ebay.com/16x-AA-2500mAh-1...item23119ca1fb

them for an example are 2 amp each times by 8 the number of batteries so your looking at 16hrs give or take.
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post #7 of 17
Quote:
Originally Posted by DuckieHo View Post
Could be done with $3-5.


OP, 8 batteries would probably be bulker than a tiny unregulated power supply.
Personally i'd go with this idea as it's less hassle
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post #8 of 17

400 - 900 mAh per battery, say the fans are .25 amps per, .75 amp total.

I say one hour for 8 aa batteries and three fans.

Get some d batteries and fans without leds. better yet get an ac dc 12v adapter and wire it up. You probably have one lying around. Lower voltage would work too. probably need more than 6 though.


Duckie's link is better.
Edited by PARTON - 6/17/11 at 12:13pm
    
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post #9 of 17
Quote:
Originally Posted by DuckieHo View Post
Could be done with $3-5.


OP, 8 batteries would probably be bulker than a tiny unregulated power supply.

$2.70 for a 120v to 12v@1A adapter: http://cgi.ebay.com/Adapter-Converte...item19c5183a83

Replace the jack with two Molex pins and plug.
Do what Duckie said.
post #10 of 17
Thread Starter 
Thanks guys... hopefully I can find an adapter like that at home with a really long wire
    
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