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Old 01-26-2004, 03:03 PM   #11
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Yikes!!! Hold everything.

In your first post you list that you bought:

Quote:
1) 2 12VDC cooling fans
2) 25.2-volt AC 2-amp power transformer
3) 6 foot AC line chord
In subsequent posts Electrobes corrected that you need a 12V power transformer then Yaksplat indicated to parallel wire.

Quote:
so i go back to radio shack get a 12 volt AC adapter and that should do it?

However, You have a current type mismatch. The transformer is 12V AC and the fans are rated 12 V DC.

If you run it this way your fans will oscillate 60 times a second back and forth or may just blow out.

You need a 12V DC power pack. I recommend a 12V DC wall power pack with a power rating greater than the sum of the two power requirements of the fans by at least 20 % Then wire as indicated above.

This one is proabably good (just check the mA of both fans)
http://www.radioshack.com/product.as...Fid=273%2D1776

This is cheaper and definitely has enough power if you can wait for mail order:
http://www.allelectronics.com/cgi-bi...219&type=store


Alternatively you can use the line cord and 12V AC transformer but then you must add a full wave Bridge Rectifier to convert the AC output to DC.

Note: sometimes the wall plug-in transformers are called AC adapters but they can have AC output or be rectified to DC output, you have to check each. Sometimes these are called power-packs as well.

Any questions please let me know.

Tom
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Old 01-26-2004, 03:28 PM   #12
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whoa, thanks tom
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Old 01-27-2004, 02:02 AM   #13
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i think electrobes meant dc. he wouldnt set you astray on purpose. i also like how dc is direct current and ac is activated carbon. i will second the switch as well. and/or a potentiometer. you cant have too much cooling but you can have too much noise.
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Old 01-27-2004, 09:50 AM   #14
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Just hold on a second. Is that why the activated carbon in my filter isn't working well as a UPS? This changes everything...

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Old 01-27-2004, 11:41 AM   #15
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i will keep everybody updated

thanks everyone

mark
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Old 01-27-2004, 02:28 PM   #16
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Yaksplat - LOL, that is a really funny post
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