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Member Since: April 1, 2010

Country: United States

  • Actually, if my understanding of diodes is right, the red LED will cause a lower voltage drop, it has nothing to do with resistance. If this is the case, running one resistor to ground will cause a bit of a mess here. This means all 3 LEDs are directly in parallel, and since voltage drop must be equal in parallel, but the rated voltage drops for the LEDs are different, this is going to do some weird stuff. Adding resistors in series with each LED will fix this because the voltage drop over the resistor connected to the red LED will just be a little higher.

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