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Mar 20, 2006, 10:27 PM
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#1 |
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I'm the only one
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what size resistor?
just a quickie,what size resistor do i need in line to drop the fan voltage to 7v?,without doing the yellow+/red- thing?.i dont really want or have room for a controller.
thanks guys
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Mar 25, 2006, 02:19 AM
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#2 |
 
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well it might be a 5v resistor.......
12v - 5v = 7v im not a totally sure thats what their measured in but if you ask whereever your buying it from they should help |
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Mar 25, 2006, 06:10 AM
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#3 |
 
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if i am not mistaken,
volt=ohm x ampere... to reduce the voltage,it must know both the resistor and your fan voltage resistance... |
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Mar 25, 2006, 06:47 AM
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#4 |
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ahh yeh thats right
v/ir v = voltage (volts) i = current (amps) r = resistance (ohms) Im pretty sure if you look on your psu it will tell you the amps on your 12volt rail. normally its about 20amps i think, but it varies from psu to psu. im a physic student but im pretty sure thats right |
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Apr 13, 2006, 02:28 PM
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#5 |
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volt
Volt = i (ampere) / R (resistor)
then 7 = 5 Ampere (approx) / R 7 / 5 = R R=1.4 Ohm ... check the ring colour ..or ask mr.google |
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