Features:
Able to detect ambient brightness and light intensity
Adjustable sensitivity (via blue digital potentiometer adjustment)
Operating voltage 3.3V-5V
Digital switching outputs (0 and 1) -D0
With fixed bolt hole for easy installation
Small board PCB size: 3cm * 1.6cm
Power indicator (Red) and the digital switch output indicator (Green)
Features wide range voltage comparator LM393
Pin outs:
External 3.3V-5V VCC
External GND ground
DO digital output interface, a small plate (0 and 1)
 
How to use:
Photosensitive resistor module most sensitive to environmental light intensity is generally used to detect the ambient brightness and light intensity.
Module light conditions or light intensity reach the set threshold, DO port output high, when the external ambient light intensity exceeds a set threshold, the module D0 output low;
Digital output D0 directly connected to the MCU, and detect high or low TTL, thereby detecting ambient light intensity changes;
Digital output module DO  can directly drive the relay module, which can be composed of a photoelectric switch;