A Simple Relay Shield for Arduino | Evil Mad Scientist Laboratories

For a demo, just open the Arduino “Blink” example sketch and change the LED pin to 4. When output Digital 4 on your Arduino is low, the relay is in the “normal” state: the “Common” pin of the screw terminal is connected to the N.C. (“Normally
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Technorati Tags: arduino, blink, demo, Mad Scientist, Screw Terminal, sketch

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