Overview
Emitting a beam of infrared, and receive the reflected beam
Features wide range voltage comparator LM393
Adjustable sensitivity
Signal output indicator
Specifications
Power: 3.3V ~ 5V
Dimension: 39mm × 15.5mm (include the IR LED)
Mounting holes size: 3mm
Detection range: 2cm ~ 30cm (depending on the obstacles color, farthest for white)
Detection angle: 35°
Recommended environment: in door, to avoid the sunshine effect
Applications
Robot path tracking
Obstacle-avoiding car
Pipeline counter
How to Use
In the case of working with a MCU:

VCC ? 3.3V ~ 5V
GND ? GND
AOUT ? MCU.IO (analog output)
DOUT ? MCU.IO (digital output)