Build a Line Follower Robot
Learning objectives
Understand IR reflectance sensors, digital input signals, motor control and basic feedback loops.
Typical components
Two-motor chassis, motor driver, controller board, IR line sensors, wheels and a properly rated battery pack.
Build outline
- Fix motors and wheels to the chassis.
- Mount IR sensors near the floor, facing downward.
- Wire sensors and motors to the controller via the motor driver.
- Upload suitable steering logic for the motor-driver pins in your build.
- Test the robot on a high-contrast track and adjust sensor thresholds.
Use manufacturer wiring diagrams for the exact boards you purchase, and never power motors directly from a microcontroller I/O pin.