The mechanical arm consists of Arduino, servos, and MeArm hardware. The Arduino controls the servos through programming, enabling the functionality of the mechanical arm. There are two types of servos: analog servos and digital servos. Digital servos (Digital Servo) and analog servos (Analog Servo) are fundamentally the same in terms of mechanical structure, consisting mainly of motors, reduction gears, control circuits, etc. The main difference lies in the control circuit; digital servos include a microprocessor and crystal oscillator. Digital servos respond faster, have a smaller deadband, higher positioning accuracy, and stronger anti-interference ability, gradually replacing analog motors in applications such as robots and model aircraft.

The Arduino controls four servos through programming to enable the functionality of the mechanical arm.