Thread: Running a LED on 6v?
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Unread 13-03-2005, 00:11
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Re: Running a LED on 6v?
it's always running at 3.6V. The voltage drop across an LED is a fairly fixed thing. The resistor affects how much current will be passing through the LED. Basically, if it's a 3.6V LED, that means the resistor will HAVE to have 6V-3.6V of voltage across it. So the resistor has 2.4V across it. Then you just use Ohm's law to set the resistance of the resistor to get the desire current through the circuit.

Now, the current is what actually affects the brightness of the LED. there's probably a graph of the LED's brightness vs. current somewhere if you look hard enough.
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