Laser sensor board

Description

This small module uses a LASER as transmitter and a phototransistor as receiver. The beam emitted by the transmitter is reflected by the surface in front of it and hits the lens (which focuses the reflected light onto the phototransistor) of the receiver, driving the phototransistor into conduction. The receiver only detects the reflected light emitted by the LASER, preventing interference from other light sources. This module can be used to detect obstacles, as a piece counter, etc.