How to find the right resistor for LED installs

Contour Enthusiasts Group Archives

Sorry if this is a repost but I'm at work and don't have time to search. I just thought it could be a real help for anyone installing LED's who doesn't know what rating resistors to use. Here it is. The needed values will be supplied with the LED's you pick out.

this is great! thanks a lot!

this should DEFFINATLEY be a sticky

Originally posted by mystiquevltwin:
this is great! thanks a lot!

this should DEFFINATLEY be a sticky

+100000000000000000

sp - definitely

And I agree. Very useful!

Originally posted by The Spelling Nazi:
sp - definitely

And I agree. Very useful!

ekk...thanks nazi

A recommendation to those doing their own LEDs:
Most of the time the current rating given with the LED is the MAXIMUM current. If you want the LED to last longer with less chance for problems, I suggest you de-rate the current a bit. I.e. for a 20mA LED I'd calculate the resistor for 15mA.