 LED Question, voltage |
 Dec 23, 2005 - 12:10 PM
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 Enthusiast  Joined Dec 1, '05 From South Windsor, CT Currently Offline Reputation: 0 (0%)  |
I have some 4 volt LED's that I wanna install inside my climate control unit. Will I still need to use a resistor if I hook 3 of them in series, since the total voltage would be 12 volts? Trying to find the easiest way to do this.
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Dec 23, 2005 - 12:18 PM
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 Enthusiast Joined May 6, '05 From PA Currently Offline Reputation: 4 (100%) |
It depends on what the specs are on them, I have a bunch of LEDs that can handle between ~2.4-3.5 volts. So I always run them in series of 4.
Edit: I reread your post, if they can take 4 volts, you don't need a resistor, but remember, car electrical voltage fluctuates, It can get down to 10 volts, *I think* before it won't start, and can be as high as 13+ if the car is running with no load on the alternator. This post has been edited by Cutrara: Dec 23, 2005 - 12:20 PM -------------------- |
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Dec 24, 2005 - 1:49 AM
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 Enthusiast Joined Feb 3, '05 From USA/Virginia Currently Offline Reputation: 2 (100%) |
my celicas alternator spikes way up at 14v when i messured from the dome light socket. but the climate control stayed damn near 12v, in both battery and altenator.
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