USES:A variety of light detection, 2 road detection, can two-way control at the same timeThe module features:1, using photosensitive resistance sensor2, the comparator output, signal clean, good waveform, driving ability is strong, for more than 15 ma.3, with a potentiometer sensitivity adjustment4, the working voltage of 3.3 V to 5 V5, the output form: digital switch output (0 and 1)6, has a fixed bolt hole, convenient installation7, small board PCB size: 3.2 cm x 1.7 cm8, using the LM393 wide voltage comparatorModule instructions1, the photosensitive resistance module's most sensitive to ambient light, commonly used to detect the environment around the brightness of the light.2, module in the environment light brightness than set threshold, the output high level, when the environment light intensity more than set threshold, the module output low level;3, output can be attached directly to the single chip microcomputer, through single chip microcomputer to detect the high and low level, thus to detect the environment light intensity change;4, output can be directly driven our relay module, which can form a light-operated switch;