So i was messing around with a 6V and 1.2 Amp unipolar stepper motor, using only the 5 V power source from the arduino UNO. I was trying to use different codes, but suddenly when i tried to upload, the arduino software couldn't locate the serial port, even though it was connected, and i could see t…

Couldn't find USB port, power surged through - what happened?

CrossRoads April 28, 2014, 11:44pm 5

External would be much better. Preferred, actually.

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