Hi all, I am a new to arduino uno. Recently I start to play with Micro Servo 9g motor, but it began to rotate 15-20 degree after connected the GND and VDD(5V from another board). When put to VDD again, it rotated another 15 degree. I think the motor should stay stalling when just connecting to VDD…

Micro Servo 9g motor rotates automatically when powered on without PWM signal

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