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Unread 02-28-2005, 03:45 PM   #1
jman1310
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Location: Sunny Florida
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Default LED Mod

after some research, I found blue LEDs run at 3.0-3.6 volts and if LEDs are run in series they distribute the voltage equally thoughout all LEDs.

so (4) LEDs per fan 12/4=3 Volts per LED

since my fans are all severly undervolted (5V) the LEDs do not light up.

To fix this I wired the LED group seperately to the 12V line and the lights are back on.
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Unread 02-28-2005, 05:38 PM   #2
redleader
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You're running them without a series resistor? If so, you're lucky you didn't burn anything out.
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Unread 02-28-2005, 10:41 PM   #3
jman1310
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no, not lucky. just did my homework
see this link and this LED restistor calculator
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