Mobility assistance is essential for physically challenged individuals, especially leg amputees and elderly people. This project presents the design and implementation of a Voice-Controlled Real-Time Wheelchair using Bluetooth communication and obstacle detection. The system allows users to control the wheelchair through Android-based voice commands, providing hands-free and convenient operation. An Arduino UNO microcontroller processes the received commands and controls DC motors through a 4-relay board. An ultrasonic sensor (SR04) is integrated to detect obstacles and automatically stop the wheelchair to ensure user safety. The system is battery-operated, cost-effective, and designed for real-time applications in healthcare and assistive technology. This project enhances independence, safety, and ease of mobility for users.

    Objectives:

• To design and develop a voice-controlled wheelchair system.
• To enable hands-free operation using Android-based voice commands.
• To implement Bluetooth communication for wireless control.
• To control wheelchair movement in forward, reverse, left, and right directions.
• To integrate ultrasonic obstacle detection for user safety.
• To develop a battery-operated and energy-efficient system.
• To provide a low-cost and reliable mobility solution for physically challenged individuals.

    The major building blocks of this project are:

1. Battery power supply.
2. Arduino UNO Microcontroller.
3. LED indicators.
4. DC motors with Relay driver.
5. HC-05 Bluetooth.
6. SR04 Ultrasonic sensor.

      Software’s used:    

1. Embedded C programming.
2. ARDUINO IDE for dumping code into Micro controller.
3. Express SCH for Circuit design.

        Block diagram:          

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