Bluetooth DC Motor Control with Android

Bluetooth DC Motor Control with Android: Complete Guide for EEE Final Year Project

1. Introduction
2. Project Overview
3. Required Components
4. Circuit Diagram Explanation
5. Step-by-Step Implementation Guide
6. Arduino Code Explained
7. Testing the Project
8. Conclusion

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Introduction

Bluetooth DC Motor Control with Android is a popular and practical project for Electrical and Electronics Engineering (EEE) students, especially for their final year. This project allows students to explore wireless communication, Arduino programming, and motor control, providing valuable hands-on experience that can be applied in real-world scenarios. By using an Android device to control the motor, students can demonstrate the seamless integration between mobile technology and embedded systems.

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Project Overview

This project involves creating a system where an Android smartphone communicates with an Arduino UNO through a Bluetooth connection. Commands sent from the mobile device control the rotation of a DC motor. The system includes an HC-05 Bluetooth module, which handles wireless communication, and an L298N motor driver, which powers and drives the motor. An optional LCD display can be added to show real-time information, such as the motor’s status.

This project demonstrates a practical application of wireless motor control and serves as a great introduction to IoT concepts.

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Required Components

To build the Bluetooth DC Motor Control with Android project, gather the following items:

• Arduino UNO
• HC-05 Bluetooth module
• L298N motor driver
• DC motor (12V)
• 16×2 LCD with I2C module (optional for display)
• SMPS (Switched Mode Power Supply)
• Breadboard and jumper wires
• Android device with a Bluetooth app for sending commands

Ensure you have tools such as a soldering iron, multimeter, and computer for programming the Arduino.

Circuit Diagram Explanation

The circuit diagram outlines the connections between the components:

• The HC-05 Bluetooth module is connected to the RX and TX pins of the Arduino for serial communication.
• The L298N motor driver is connected to the Arduino for motor control, and it powers the DC motor.
• The SMPS provides a stable power supply for the motor.
• The optional LCD display can be connected using the I2C module for easier wiring and to show motor operation details.

Step-by-Step Implementation Guide

Step 1: Connect the Hardware

• Attach the HC-05 module to the Arduino (TX to RX and RX to TX).
• Connect the L298N motor driver to the Arduino and the DC motor.
• Wire the power supply to the motor driver and the Arduino.
• Connect the LCD display if you’re using one, to display status updates.

Step 2: Upload the Code to the Arduino

Step 3: Configure the Android App

• Download a Bluetooth controller app from the Play Store or create a custom app using MIT App Inventor.
• Pair your Android device with the HC-05 module and send commands to control the motor.

Arduino Code Explained

The provided code sets up a serial connection between the Arduino and HC-05 module. The commands sent from the mobile device (‘F’ for forward, ‘S’ for stop) are read by the Arduino and used to control the motor’s state. This straightforward logic allows for effective motor operation using a simple Android interface.

Testing the Project

After setting up the hardware and uploading the code, pair your Android device with the HC-05 Bluetooth module. Open the Bluetooth controller app and test the motor’s response to commands. Verify that the motor starts when you send the ‘F’ command and stops with the ‘S’ command. If you’re using an LCD display, it should show the motor’s current status.

Conclusion

The Bluetooth DC Motor Control with Android project is an excellent way for EEE students to understand wireless communication and motor control. This project offers a practical application of microcontroller programming and Bluetooth technology, making it an ideal choice for a final year project. It also helps students build foundational skills for future IoT and embedded system projects.

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External Resources (DoFollow Links)

• Arduino Official Documentation
• Learn to create Android apps with MIT App Inventor

Internal Links

• Check out our EEE project library for more innovative project ideas.

By following this guide, you will create an engaging and functional Bluetooth DC Motor Control with Android system for your final year project.