The basic concept of IR(infrared) obstacle detection is to transmit the IR signal(radiation) in a direction and a signal is received at the IR receiver when the IR radiation bounces back from a surface of the object.
Features:
There is an obstacle, the green indicator light on the circuit board
Digital output signal
Detection distance: 2 ~ 20cm
Detection angle: 35 ° Degree
Comparator chip: LM393
Adjustable detection distance range via potentiometer: