I made this line following robot with my kid. It was a long pending wish that I could complete in these covid-19 days. We also made a nice track to test our line following robots. My kid laid out the track and then we made a nice tunnel and a bridge to test our robot. It was a fun Sunday.
Robot in action
Line following robot
Confused robot when track is missing 🙂
Sensors in action for line following robot
Gallery
Circuit – PCB
Front: Line following robot PCB Back: Line following robot PCB
Circuit Diagram
Sensors
Photoresistor 
