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/diy/ - Do It Yourself

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>> No.2408102 [View]
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2408102

Can someone confirm if I understand leds correct.

Say my supply voltage is 2.4v and I have a red led with 2.0v voltage drop and rated safe for 15mA. I need a resistor that gives 15mA for 0.4V right? So in this example it is ~27ohm

If I had 3.3v supply then it is (3.3 - 2)V / 15ma = ~86ohm

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