Computers and Peripherals - Wiring case fans to wall power

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Rayvin
06-09-08, 02:04 PM
I'm making a laptop cooling lapdesk for myself and I wand to use a few case fans to do it. I also want to power it with an AC adapter. So, I have 3 case fans and I want to wire them to this AC adapter and I think I have to wire them in parallel. I was wondering if anyone could help me out with this.

The fan info is:
Rated voltage: 12V
Started voltage: 7V
Rated current: 0.18A (Max 0.20A)
Power Input: 2.16W (Max 2.40W)

The AC adapter info is:
Input: AC 120V 48W 60Hz
Output: DC 12V 3.25A

Thank you for any and all help.

joed
06-09-08, 03:13 PM
The adapter will work. It could power 16 fans if you wanted.
Hook all the fan in parallel. If they turn the wrong direction, reverse the power leads.
Rayvin
06-09-08, 04:14 PM
Do I need to do anything about amps or ohms? I was reading around and I don't want to give them too much current. Thanks.

oneofamill
06-09-08, 05:53 PM
It's not a matter of supplying too much current. It's how much they draw.
You could hook them up to a 12volt, 1000amp supply and they will work fine.
Rayvin
06-09-08, 07:26 PM
Cool, sounds good. Thanks all. I really appreciate it. I should be able to move forward with my project now.