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What voltage to design for? |
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Akshay
Joined: Jan 09 2009 Posts: 6 |
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Tue Jun 09, 2009 1:05 am
Can someone tell me what maximum car voltage I should use to design an LED circuit please? I'm making some LED indicator strips and want to know what voltage to put into my calculations because this will determine what resistors to use. Obviously the battery is 12V but there are voltage spikes when the engine is running.
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bad venge
Joined: Jul 28 2007 Posts: 1602  1998 Dodge Avenger Last updated: 05/18/09 |
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Tue Jun 09, 2009 4:50 am
I use 14 thats what I measured at full RPM's ... I might be higher as I have an aftermarket 200amp alternator ... 13.5 would be a safe bet as well
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corvettecrazy
Joined: Dec 17 2003 Posts: 3773 Location: moved (twice) 1996 Pontiac Bonneville Last updated: 06/11/07 2000 Chevrolet Corvette Last updated: 08/31/04 |
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Tue Jun 09, 2009 6:01 am
You should be using voltage regulators, that way the output does not vary even if your input does.
If you only want to use resistors, then you should use 14.4 or something near that. On colder mornings I commonly see my car in the 15.0-15.2 range for voltage. |
The time now is Sat Nov 21, 2009 2:17 pm