4-wire sensor module

Purpose:
Light brightness detection, light brightness sensor, with directionality, only sensing the light source in front of the sensor, for better light seeking effect
Module features:
1. It can detect the brightness and light intensity of the surrounding environment (compared with the photosensitive resistance, the directivity is better, and the light source with fixed direction can be sensed)
2. Adjustable sensitivity (blue digital potentiometer in the figure)
3 working voltage 3.3v-5v working current: 8.2ma static current: 4.7ma
4 output form: do digital switch output (0 and 1) and AO analog voltage output
5 with fixed bolt hole, easy to install
6 small PCB size: 2.7cm * 1.4cm
Module instructions:
1 photodiode module is the most sensitive to the ambient light intensity. It is generally used to detect the brightness and light intensity of the surrounding environment. In most cases, it can be used with the photosensitive resistance sensor module. The difference between the two is that the photodiode module has good directivity and can sense the light source in a fixed direction.
When there is no light condition or the light intensity can not reach the set threshold, the do port outputs high level. When the external environment light intensity exceeds the set threshold value, module d0 outputs low level;
The digital output d0 of the small board can be directly connected with the single chip microcomputer. The high and low levels are detected by the single chip microcomputer, so as to detect the change of the light intensity of the environment;
The digital output do of 4 small boards can directly drive the relay module of our shop, thus forming a photoelectric switch;
5 small board analog output Ao can be connected with our ad module, through AD conversion, we can get more accurate value of ambient light intensity
Product wiring instructions:
1. VCC connected to positive pole of power supply 3.3-5v
2. GND connected to negative pole of power supply
3. Do TTL switch signal output
4. Ao analog output