Editing Light-emitting diode
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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: | 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 | + | R = (5-1.2)/.02 = 190 ohm |
You then connect a 190 ohm resistance in series with the LED to make it work. | You then connect a 190 ohm resistance in series with the LED to make it work. |