What is DC Motor interfacing

What is DC Motor Interfacing?

Before learning motor interfacing, first, let’s see types of Motors. In electronics, there are three types of motor:

DC Motor :  A direct current or DC motor, converts electrical energy into mechanical energy. There are two types of it -

  • Non-encoder motor
  • Encoder motor

Servo Motor : A servo motor is a rotary actuator or an engine that allows for precise control in terms of theangular position, acceleration, and velocity. It has specific capabilities that a regular motor does not have. Consequently, it makes use of a traditional motor and pairs it with a sensor for position feedback. It has two types:

  • Standard Servo
  • Continuous Rotation

Stepper Motor : A stepper motor is a special type of electric motor that moves in increments, or steps, rather than turning smoothly as a conventional motor does. The size of the increment is measured in degrees and can vary depending on the application. Typical increments are 0.9 or 1.8 degrees, with 400 or 200 increments thus representing a full circle. The speed of the motor is determined by the time delay between each incremental movement.

Now, the detail explanation of the DC motor is given in the video. The video includes a description of its parts and operation. Also, L293D motor driver, IC demonstration is given. You can learn how to interface DC motor in Arduino. In this, how you can interface more than one motor is also described. Every input/output, voltage, ground etc. pins are explained well.


  • DC motors are used to actuate a variety of devices and machines. They are typically found in the rotating parts of a machine and act as the prime mover.
  • When a DC motor is interfaced with another device, it is usually done by using an encoder or hall effect sensor to sense the position of the motor shaft. This allows for precise control of the motor speed, torque, and direction.

  • Arduino is a popular platform for building creative projects and experimenting with electronics. It has a wide range of sensors, actuators, and other components that can be used for building interactive systems.
  • DC Motor interfacing is a process in which the Arduino controls the speed of a DC motor. The Arduino uses analog inputs to detect the position of the shaft which then changes the speed accordingly.

  • DC Motor interfacing is a way to control a DC motor by using the Arduino. It is useful for robotics, model building, and other projects that require precise control of a DC motor.
  • A DC motor can be interfaced with the Arduino by connecting an H-bridge circuit to the Arduino. The H-bridge circuit consists of two switches and one capacitor. The capacitor allows the Arduino to charge or discharge current into or out of the DC motor depending on which switch is on or off.
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  • DC Motor interfacing is a process in which the DC motor is connected to the Arduino board. It can be used for many purposes such as controlling a robot, driving a car, or even an airplane.
  • The main reason why you would need DC Motor interfacing is to control your robot by using an external power source like solar panels or batteries.

  • The most common way to interface a DC motor with an Arduino is to use a H bridge. This is because it allows the Arduino to control the speed of the motor and also provides power for both the motor and Arduino.
  • A less common way of interfacing a DC motor with an Arduino is by using two transistors in parallel. This method requires that you use two resistors in series with each transistor instead of just one resistor as you would do when using H-bridge method.

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