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case fan current? amp?

post #1 of 8
Thread Starter 
does anyone know how many amps a typical case fan draws?

how much current does a case fan use?

and anyone know of one that draws alot of current? im not planning on using it for my pc. i just need one that draws a lot of current for a experiment.
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liger-zero
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post #2 of 8
i think they are about .2 amps

some theory P = IV, since V = 12
80 mm 2 watts 0.16 ampere
92 mm 3 watts 0.25 ampere
120 mm 5 watts 0.41 ampere

These all vary depending on the fan.

Amps = measuring unit of Current

Check newegg more watts = more ampere = more rpm,
    
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post #3 of 8
dkdeath is right on.

If you want something that draws current... get resistor: V=I*R -> I = V/R

Or a diode.
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post #4 of 8
case fans are pretty efficent, you could use a resistor, but a diode will drop voltage, not just increase current.
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post #5 of 8
Quote:
Originally Posted by odie View Post
case fans are pretty efficent, you could use a resistor, but a diode will drop voltage, not just increase current.
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post #6 of 8
Thread Starter 
ok if i get a resistor what size? and can someone give me a diagram for hooking it up please?
liger-zero
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liger-zero
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post #7 of 8
Quote:
Originally Posted by this n00b again View Post
ok if i get a resistor what size? and can someone give me a diagram for hooking it up please?
Ahh... what do you want to do? Resister size depends on application and load.
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post #8 of 8
ok how meny amps are you wanting to draw form the psu ill give you any resiters you need, but if you exead there wattage rating you will break them they will get hot and melt or crack. If you want tell me how much current you want to draw and ill do all the math for you.
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