1. LINE FOLLOWER ROBOT Guided By: Made By: Mrs. Geetali Saha Parth Patil (130110109040) Arsh Patel(130110109031) KishanPatel(130110109034)

2. List of Components OPA1013D Op-amp IC………………………….1 L293D Motor Driver IC…………………………1 2k variable Resistor……………………………..2 LDR………………………….…………………………..2 White LED………………..…………………………..2 Green LED……………………..……………………..2 1k Resistor……………………….…………………..2 P-n junction diode…………….………………….2 220k resistor………………………….……………..2 200 rpm DC Motor…………………..……………4

3. Main Concept : Comparator Circuit Comparator compares 2 input voltage with reference voltage and gives output in digital form. If Vin > Vref : output is HIGH If Vin < Vref : output is LOW It is implemented using Op-Amp. Vref in Inverting (-) Pin Vin in Non-Inverting (+) Pin

4. Working Black and white color reflect light with different intensities. LDR has different values of resistance in different intensities of white & black light. Voltage drop across LDR is given as input to comparator circuit. Comparator Circuit checks whether light is reflected from black line or background. Output is given to motor driver ic accordingly considering the direction of turning at each signal from comparator circuit.

5. Schematic Diagram

6. Actual Photographs

7. Real Life Applications Autonomous robots in Industry. Autonomous transportation. Tour guides in museums and other similar applications