This LM393 Photosensitive Light-Dependent Control Sensor LDR Module is using a high-quality
LM393 voltage comparator. Easy to install using the sensitive type photosensitive resistance
sensor the comparator output signal gives a clean and good waveform.
Driving ability is 15mA with the adjustable potentiometer, it can adjust the brightness of
the light. Working voltage is 3. 3V to 5v. Where output is a digital switch output. Since
this module is sensitive to the light, usually used for detecting the ambient brightness and
light intensity.
You can use this board digital output DO port drive relay module directly and can also use
as a photoelectric switch. The analog output ao connects with ad module and it can get more
precise light intensity value through the ad-converter.