Module interface specification (4-wire):

 

1.VCC:3.3V-5V external voltage (can be directly connected to the 5v microcontroller and 3.3v microcontroller)
2.GND:connect to GND
3.DO:Module digital output interface (0 and 1)
4.AO:Module analog output interface

 

Instructions for use:

1.Photodiode module is most sensitive to the ambient light, generally used to detect the brightness of the ambient light intensity, photoresistor sensor module Universal In most cases, the difference between the two is that photodiode module directional, can sense the fixed the direction of the light source.
2.Module in the light conditions or the light intensity of less than a set threshold, DO port outputs a high level, when the external environment when the light intensity exceeds the set threshold value, the module D0 output is low;
3.Module digital output D0 can be directly connected with the microcontroller, microcontroller to detect high and low, to detect environmental light intensity change;
4.Module digital output DO module can directly drive relays, which can form a photoelectric switch;
5.Module analog output AO and AD module connected through the AD converter, the ambient light intensity can get more precise values