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Being metal geared, the servo has long life and can be installed on system like robotic arm were motor work is huge. The servo is also suited to be used in drones and toy planes.
Having a satisfying torque which is enough to overcome air resistance and control wings of plane, the servo is preferred in toy planes and drones which need precision control no matter the condition. In the circuit if microcontroller and servo has different power sources then the microcontroller ground needed to be connected to servo ground.
As shown in figure the every single cycle of PWM needs to be 20ms width for 50Hz frequency. If we provide a PWM signal of 0. And if we provide a PWM signal of 1. At last if we provide a PWM signal of 2. Based on these standard values we can also calculate any other degree of rotation.
After calculation we just have to adjust the duty cycle of the PWM for the servo to read the signal and change to that stated position. In this way we can control the servo position using PWM signal of any microcontroller or processor.
In arduino and other development boards we will have libraries readily available to make it even easier to control the servo. If we use those libraries we can directly state the servo position instead of adjusting the PWM duty cycle every single time.
TowerPro Servos (27)