Difference between revisions of "Light-emitting diode"
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Revision as of 18:27, 27 July 2007
Light emitting diode:
The resistance required is as follows: R = (U_power - U_led) / I_max
Example a LED with voltage drop of Uled=1.2V and a max current of I_max=0,020A (20mA) to be powered by a 5V DC source needs:
R = (5-1.2)/.02 = 190 ohm
You then connect a 190 ohm resistance in series with the LED to make it work.
