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led lights

giorno71

Jan 28, 2013
1
Joined
Jan 28, 2013
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1
i want to make custom signal light for my jeep, i have two led flashlights that i want to use.
so my question is; the flashlights have 9 led's in the board, it runs off 3 AAA batts or 4.5 volts, how do i figure out what resistor to use to hook up to my 12v system?
i have no info on the leds contained in the flashlights.

Thank you
 
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