The specific structure of the servo is as follows:

①: Signal line: receive the control signal from the microcontroller;

②:Potentiometer: It can measure the position of the output shaft,which belongs to the

feedbackpart of the entire servo mechanism;

③: Internal controller: processing the signal from the external control,driving the motor and

processing the feedback position signal,is the core of the entire servo mechanism;

④: Motor: as an actuator, how much speed, torque, position is output;

⑤: Transmission mechanism/servo system: This mechanism scales the output stroke of the

motor to the final output angle according to a certain transmission ratio;

The output of the servo is controlled by sending a PWM signal to the signal line of the servo.