This is probably an easy question to answer, but I've having some problems powering my circuit properly. I'm using an Arduino pin to use a transistor as a switch, to turn on an array of LEDs. The array of LEDs is currently being powered by the 5V pin out of the Arduino. All is well. But it's a limi…

Beginner question: Arduino & External Power Supply

CrossRoads April 22, 2012, 1:32am 3

Your LEDs are connected like this?

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