I have 4 servos running on an arduino as a robotic arm. They are being powered by the usb, with only 1 servo operating at a time. At certain points two of the servos start convulsing and shaking and the usb/com port connects and disconnect every second, then it requires unplugging/resetting the ard…

Servos convulsing randomly

zoomkat April 29, 2014, 4:05am 2

They are being powered by the usb

Bad! Servos usually require an external power supply to prevent the servos from causing the arduino to reset.

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