Servo Motors

How do they work? The motor shaft is connected to the

potentiometer. The average voltage of the PWM signal is

compared to the voltage set by the potentiometer and the

difference drives the motor.

Angular range approximately 0 - 180


o       PWM signal with a constant period of 10ms

o       Duty cycle (the time of the high voltage) controls the angle, approximately 0.3 ms (0) to 2.5 ms (180)

        Color code of the wires:

o       Red:+5V, black: ground, white: PWM (0 to 5V)

Resolution: depends on the duty cycle resolution, use concatenated PWM channels! Make sure that the number in the period register is as high as possible!


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