Servo wiring layout. The above Figure 1 shows the pin diagram for servo motor SG90. The third pin (orange or yellow wire) accept the control signal which is a pulse-width modulation (PWM) signal. It can be easily produced by all micro- controllers and Arduino board. This accepts the signal from your controller that tells it what angle to turn to. The control signal is fairly simple compared to that of a stepper motor. It is just a pulse of varying lengths. The length of the pulse corresponds to the angle the motor turns to. The pulse width sent to servo ranges as follows: Minimum: 1 millisecond ---> Corresponds to 0 rotation angle. Maximum: 2 millisecond ---> Corresponds to 180 rotation angle. Any length of pulse in between will rotate the servo shaft to its corresponding Angle. For example, 1.5 ms pulse corresponds to rotation angle of 90 degree. Below Figure 2 explain about control of servo with PWM signal..................... 1. Which signal is applied to the servo control positon of servo shaft? 2. If a 10 bits Arduino Microcontroller is connected in the above Figure 4 with the potentiometer and supply voltage of 6 volts, what is the resolution? 3. What are different parts of servos