It has an on board comparator circuit with adjustable potentiometer to set the reference/threshold voltage for the infrared detection level. It also has power and digital output LED indicator for easy debugging. The circuit is a pair of infrared emitter and phototransistor which send signal to each other when there is a white/clear surface and blocks any signal when there is black/dark surface.
You can also get a 4 channel module in one board, check out the Line Follower Sensor (Infrared) Board – 4 channels.
- Working Voltage : DC 3.3-5V
- Signal Output : 0 (detected), 1 (not detected)
- Detecting Distance : 2-30cm (adjustable)
- Detection Angle : degrees ~35
- Module Size : 32X14mm
- Board Size : 3.1CM * 1.5CM / 1.22 * 0.59″
- Use comparator LM393
Tutorials / Manuals / Documents
- Infrared Line or Obstacle Detection Sensor Board Quickstart Guide
- Infrared Line Sensor with Arduino reference project (byelectronicshub.org)
- Line follower robot using Arduino (by circuitdigest.com)
- Line Robot Arduino (hackster)