DC Motor Control Using Relays: A Step-by-Step Guide

This project demonstrates how to control a DC motor using two relays (SRD-05) to achieve both clockwise and counterclockwise rotation. Built on an Arduino board, the system provides an efficient and straightforward method for motor control, showcasing its versatility in various applications, from simple DIY projects to more complex automation systems.

The inspiration for this project came from a need to simplify the control of DC motors in various applications. Traditional motor control methods often involve complex circuitry and programming, which can be daunting for beginners or those looking to implement quick solutions. By using relays and an Arduino, we aimed to create an accessible and user-friendly system that could be easily replicated and adapted for multiple uses. The project also serves as an educational tool, helping others understand the basics of motor control and the practical application of relays in electronics.

The system operates by using two relays to control the direction of the DC motor. Here's a breakdown of the key components and their functions:

Arduino Board: The central controller that processes input signals and sends commands to the relays.

Relays (SRD-05): Two relays are used to switch the polarity of the motor's power supply, enabling both clockwise and counterclockwise rotation.

DC Motor: The motor that receives the controlled power supply and rotates accordingly.

Power Supply: 2 pairs of 1.5V batteries

When a command is sent to the Arduino, it activates the appropriate relays to control the motor's direction. For clockwise rotation, one relay connects the positive terminal of the motor to the positive power supply and the negative terminal to the negative power supply. For counterclockwise rotation, the relays switch the connections, reversing the motor's polarity. This setup allows for precise and reliable control of the motor's movement, making it suitable for a wide range of applications.

By integrating these components, the project offers a practical and efficient solution for DC motor control, highlighting the power and simplicity of using relays and Arduino in modern electronics.