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Poornima College of Engineering. Department of Electronics & Communication Engineering A Project Seminar On Light Following Robot Submitted To Submitted By Ms. Monika Surana Sumit V ijay Ms. Anshu Toshniwal Vaibhav Vyas Vishal Jain. Contents. Introduction
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Poornima College of Engineering Department of Electronics & Communication Engineering A Project Seminar On Light Following Robot Submitted To Submitted By Ms. Monika SuranaSumitVijay Ms. AnshuToshniwalVaibhavVyas Vishal Jain
Contents • Introduction • Circuit Diagram • Block Diagram • Components Used • Working • Advantages • Further improvements • Application
Introduction • The goal of our project was to build a robot which followed an active source of light. Our vehicleuses sensors to follow a moving light source which in our case is a torch heldby the user. The hardware is self constructed and thus was the major part of our work.
Components Used • Microcontroller(AT89S52) • Motors • Sensors • Capacitors • Resistors • LM324A • L293B
Block Diagram ADC SECTION and MICRO- CONTROLLER
Working • Our vehicle uses photodiodes to locate its position relative to the light source. The state of thephotodiodes is captured, and the car is controlled accordingly by an AT89S52microcontroller. If the car detects a small perturbation(change in intensity of the oncoming signal),it will correct its path by steering in the appropriate direction.
Working(Cont.) • The car we selected is fairly simple to operate. It has a simple two wheel drive, , which is poweredby a DC motor. The steering is achieved by applying a difference of voltages acroos the twobatteries. We used two H-bridges (L293D) to deliver power to the steering and the drive motor.Because of the current requirements (the drive motor and steering solenoid could draw severalamps), we used 20-gauge wire for the high-current areas of the H-bridges rather than the 30-gaugewire used for the rest of the circuit.
Working(Cont.) • When light will sense by the LDR, resistance will decreases by a particular amount. For get the appropriate voltage level we use LM324A. • The output of LM324A is given to the Microcontroller • To interfacing between the motors and Microcontroller we use L293B. • According the input at sensors output is shown by the robot.
Further advancement • We can use cameras for security purpose. • We can implement obstacle detectors also. • To detect multiple lights we can use high sensitivity sensors. • We can implement automatic car parking feature in it.
Application • The light sensor allows the robot to follow a light source, such as a beam of light from a flash light or similar. • In the field of mining. • In the field of research.
