DESIGN AND IMPLEMENT OF SOLAR POWERED TRICYCLE WITH AUTOMATIC ULTRASONIC MECHANICAL BRAKING SYSTEM

The present project successfully demonstrates the design and implementation of a battery-powered tricycle integrated with a solar charging system and an autonomous ultrasonic braking mechanism. The system effectively combines renewable energy utilization with intelligent control to provide a safe, efficient, and cost-effective mobility solution. The tricycle operates primarily on a 24V battery, which serves as the main power source for propulsion through a 250W BLDC hub motor. The integration of two 20W solar panels enables continuous charging of the battery, thereby extending the operating time and reducing dependency on external power sources. The ultrasonic sensor-based braking system, controlled by an Arduino UNO microcontroller, accurately detects obstacles in real time and activates the braking mechanism when the distance falls below the predefined threshold of 30–40 cm. The relay module successfully cuts off motor power, and the braking actuator ensures immediate stopping of the vehicle, enhancing rider safety. The experimental results confirm that the system performs reliably under real-time conditions, with fast response time and efficient operation. The project achieves its objective of developing a sustainable and safe transportation system, particularly beneficial for elderly and physically challenged users. Overall, the system demonstrates a practical approach toward integrating renewable energy and intelligent safety features in personal mobility solutions.

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