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The light sensor module have strong adaptable to the environment, having a pair of infrared transmitter and receiver, transmitter launch a certain frequency infrared, when meet obstacle in the detection direction, the infrared receiver is reflected back by the receiver tube, after processing through the comparator circuit, the green indicator light will illuminate while the signal output interface output digital signal (a low-level signal) can be adjusted via potentiometer.
Specifications: *The module detects the distance 2 ~ 30cm, detection angle 35 °, *The sensor active infrared reflection detection, target reflectivity and shape of the detection distance of the key *The sensor module output port OUT can be directly connected with the microcontroller IO port can also be driven directly to a 5V relay *It uses a stable comparator which is LM393 *The module is supplied with 3-5V DC power *OUT :small board digital output interfaces (0 and 1); Applications:
It can be in short remote control where you want to transmit and receive asignal