When purchasing a power supply, you have two things to worry about.
2) current draw.
So, the transformer you get from Radio Shack has to be able to do the following.
1) Supply the proper voltage
2) Be capable of supplying enough current.
In your case, you need a power supply that meets the following requirments:
1) Supplies 12 volts DC.
2) Supplies a minimum of 255 mA (3*85 mA)
So, something like this: 12V/1000mA AC-to-DC Power Adapter
will fit the bill perfectly.
If you choose a different model, be sure that it is capable of supplying 12 volts and atleast 255 mA of current(1000 mA in the adapter I pointed out).
An idea is to get a variable voltage adapter. Something that rates 3-12 volts and atleast 255 mA. That way, you can run the fans slightly slower by selecting 10.5 volts (this would be quieter, but it also moves much less air this way).
And of course, when you get this working, please let us know if these fans are as they are rumored.
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by mkam15:
Okay, i just ordered three of these fans http://www.pcpowercooling.com/produc...fan/index.htm,
the guy told me that I had to hook them up to a 12VDC battery if I wanted to use with AC power and not the computer. James, you said <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> To power PC fans all you need is a small 12vdc power supply. Radio shack is the best place to look. It should only cost $8-14.
<HR></BLOCKQUOTE> Now I looked at radio shack and this is what I found http://www.radioshack.com/product.as...Fid=273%2D1779
are these what you meant. And if so, to power three of these fans, i would need one 12v adapter, and one 13.5/30v adapter? Or can I hook them all on one adapter? Is this correct. Thanks and are they pretty easy to wire up?<HR></BLOCKQUOTE>
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