Description Product Characteristic description 1, using a wide voltage LM393 comparator 2, induction sensitivity adjustable 3, digital, analog signal output 4, with a fixed bolt hole, easy to install 5, small size: 31.75 * 17.27 mm PCB 6, the standard double-sided board, the layout is beautiful and generous Two, use Brightness of the surrounding environment can be detected. Adjust the brightness threshold through the potentiometer, when the ambient brightness exceeds this threshold, the DO pin output low level. Through the detection of the DO pin, which detects the brightness changes in the environment. The analog signal can be output by the analog signal AD, which can be used for the AO operation, and so on. Three, module interface description (3 wire system) 1, VCC: external 3.3V -5V voltage 2, GND: external GND 3, OUT: digital output interface (0 and 1) 4, AO: analog output interface Four, instructions for use 1, connect VCC and GND, module power indicator light POWER. Adjust the potentiometer, until the SENSOR refers to the light, and then a little callback, so that the SENSOR lights off, the DO pin is also the output high level. Complete threshold setting. 2, making the environment brightness enhancement, when detected by a photosensitive resistance brightness exceeds the threshold, the sensor module indicator lights, the do pin outputs low level. 3, making the environment brightness is reduced, when the photosensitive resistance measurement to the brightness is lower than the threshold, sensor lights back to the state, the do pin outputs a high level. 4, the analog side AO is not affected by the potentiometer and DO digital quantity, as long as the power that has analog output. Light from dark to light, and then from light to dark changes, analog AO output data are as follows: (serial output, serial debugging assistant display)
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