... 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 ... level;3, output can be attached directly to the single chip microcomputer, through single chip microcomputer to detect the high and low level, thus ...