[Laser] Standard LED question.

KD7JYK, 49H7KR kd7jyk at earthlink.net
Thu Apr 14 23:07:45 EDT 2005


Are all LEDs rated at a 20mA draw which is what I see in all the
manufacturers specs?  I have three dozen 3,000mCd red LEDs but no specs.  If
I run them off of 12V with about 1200 Ohm resistance, I get a current draw
of 15mA and an input voltage of about 1.8V.  I can lower the resistance to
increase current to 20mA and thus the brightness, but I'd rather run them on
the safe side.

What is the proper procedure for determining voltage\current of the average
LED?

Kurt

Rosetta Proving Ground, Nevada
Hell's Laboratory



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