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Topic: Power Source - Laptop USB & 12v barrel jack? (Read 1 time) previous topic - next topic


I'm curious if I plug in both USB cable to A-B port and a 12v wall-wart adapter to the barrel jack will it harm the Arduino?  Or will the 12v wall-wart adapter know to disable the power source in the USB cable? thanks! :smiley-eek:


No it won't harm, the arduino will switch to the wall wart power when both are plugged in :)

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