Different types of motors

Depending upon your project needs, you can choose from the variety of motors available in the market. For hobby electronics, you will mostly use either DC motor, servo motor, or stepper motor. The following image shows all three types of motors. From left to right, DC motor, servo motor, and stepper motor:

Let's get an overview about all the different types of motors.

DC motors

DC (Direct Current) motors are two-wire continuous rotational motors. When power is supplied to the motor, it will start running and will stop once power is removed. Most DC motors run at high speed, that is, high RPM (rotations per minute). The speed of the DC motor is controlled using the PWM technique (as discussed in Chapter 2, Project 1 – LED Night Lamp). The duty cycle will determine the speed of the motor. The motor seems to be continuously running as each pulse is very rapid.

Servo motors

Servo motors are self-contained electric devices that rotate or push parts of a machine with great...