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0 pointsEvidlo2y ago0 comments

If LEDs share a resistor then they dim as more LEDs are turned on.

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spuz2y ago

I meant to say why does each LED require a different resistor value?

dfox2y ago

Because different colors usually mean different semiconductor material and thus different forward voltage of the junction which in practical terms leads to different brightness if the same resistor value is used.

ilyt2y ago

Different color have different forward voltage and luminosity per mA.

Or if it is connected to some live signal the signal itself might be with different voltage range

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