Thread: Project L.E.D!
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Old 09-14-2008, 12:07 PM
Matt L Matt L is offline
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Join Date: Oct 2005
Posts: 4,263
Quote:
Originally Posted by funola View Post
These Ebay LED's have built in resistors? Did you see this in the Questions box:

"Q: what size resistor for 12 v
A: Sorry, we don't supply resistors for this high power leds. "
The electrical specs are listed, so you should be able to see that the answer is "No."

Forward voltage: 3V min, 3.4V typ, 3.8V max
Forward current: 100mA max.

From this, you can compute the needed resistor.
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