Line-Following Robot
Infrared sensors keep a small robot glued to a black track as it races a loop.
Start building ↓The build
Mount IR sensors
Fix two downward IR sensors at the front.
Wire the motors
Connect motors through a driver to the controller.
Make a track
Lay black tape on a light floor.
Tune & run
Program it to steer toward the line and follow it.
Each sensor reads how much light reflects: black absorbs, white reflects, so the robot steers to keep the line centred between its sensors.
A closer look
It's closed-loop control: sensor error (drifting off the line) feeds a steering correction many times per second.
Variables to test
- 1 Add a third centre sensor — does it track tighter?
- 2 Speed it up — where does it lose the line?
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