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Reducing Amperage

 
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shnoob



Joined: 20 Sep 2005
Posts: 1

PostPosted: Tue Sep 20, 2005 2:31 pm    Post subject: Reducing Amperage Reply with quote

Hi.

I want to reduce the amperage of a 12v 1amp 120v plug in power source to .28 amps to power a computer case fan in a different application.

Can I do this? If so, can I add more than one fan to the line without further loss of amperage?

Can the .28 amp fan run with a supplied amperage of 1amp without burning up?


Thanks in advance.
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fongs
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PostPosted: Wed Sep 28, 2005 7:02 am    Post subject: Reply with quote

Hi,

I'm not entirely clear on what u want to do. Do u have a rated 12V, 1A power adaptor to be used with yr casing fan?

If the above is true, it shouldn't be any problems since yr fan will only consume up to 0.28A of what yr power adaptor could supply. There's no need to reduce "amperage" as u thought... Smile
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fongs
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PostPosted: Wed Sep 28, 2005 7:08 am    Post subject: Reply with quote

Oh, if u want to add more fans to the same power source, u should connect them in parallel:

12v +
------------------
| | |
F1 F2 F3
| | |
------------------
-

Also, 3 fans is the max here (1A / 3 = 0.33A). Any more than that will result in reduced fan speed & overloading of yr power adaptor. Laughing
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PoxyPig
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PostPosted: Mon Nov 30, 2009 11:45 am    Post subject: Reply with quote

Sorry, you make no sense whatever!

A 120V computer case fan?? All the ones I've seen recently run from the 12V power supply.

As for amperage - there's no such word. Are you referring to current??
Current is measured in Amps, short for Ampères.
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