I just got a 6 x 10 each pack of colored clear LEDs from CLEDs and was wanting to test them for color and brightness. I loaded the blink sketch and tied GND and Pin 13 to the power rails on my breadboard. I stuck in a red LED and it flashed on and off and was very bright. I then also stuck in a blu…

LED cutoff point?

system January 5, 2013, 9:11pm 12

That's why it is a limited "limiting" resistor.

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