4-Pin Photosensitive Resistor Sensor Module Light Detection Photodiode

Features:

1. Adopts a sensitive photosensitive resistor sensor.
2. Comparator output provides a clean signal with good waveform and strong drive capability (exceeding 15mA).
3. Equipped with a potentiometer for adjusting the light detection threshold.
4. Operating voltage: 3.3V - 5V.
5. Output form: DO Digital Switch Output (0 and 1) and AO Analog Voltage Output.
6. Comes with fixing bolt holes for easy installation.
7. Small board PCB dimensions: 3.2cm x 1.4cm.
8. Uses a wide-voltage LM393 comparator.

Module Instructions:

1. The photosensitive resistor module is most sensitive to ambient light and is typically used to detect the brightness of the surrounding environment to trigger a microcontroller or relay module, etc.
2. When the ambient light brightness is below the set threshold, the DO pin outputs a High Level. When the ambient light brightness exceeds the set threshold, the DO pin outputs a Low Level.
3. The DO output can be directly connected to a microcontroller, which detects the high/low level to sense changes in ambient light brightness.
4. The DO output can directly drive a relay module (like those sold in this store) to create a light-controlled switch.
5. The analog output (AO) of the small board can be connected to an AD module. Through AD conversion, a more precise value of the ambient light intensity can be obtained.