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This Light sensor module uses a photodetectorGL5528 to detect the light intensity of the environment. As the resistance of the sensor varies depending on the amount of light it is exposed to, the output voltage changes with the ligth intensity.This module outputs both analog and digital signals, which can be used to trigger other modules.Also, the protentiometer can be used to adjust the sensitivety of digital output. The digital terminal output HIGH when the ligth intensity exceeds the value set by potentiometer, and vice versa. The outputs of analog ternimal increase with the light intensity.