LDR Photosensitive Light Sensor Module – 4-Pin Analog and Digital Output Light Detection Module for Arduino

The LDR Photosensitive Sensor Module (4-Pin) is a simple and effective light detection module designed for Arduino and other microcontroller platforms. Using a Light Dependent Resistor (LDR), this module can detect the intensity of ambient light and convert it into corresponding analog or digital signals. With both analog output (AO) and digital output (DO), it provides flexible integration for a variety of applications such as smart lighting systems, automatic night lights, solar tracking, and light-activated devices.

Whether you're building an energy-efficient automation system or experimenting with light-based controls, this module offers a compact and beginner-friendly solution.

🔍 Key Features:

Light Detection using LDR: Responds to ambient light intensity by varying resistance based on light exposure

Dual Output:

Analog Output (AO): Provides variable voltage based on light intensity

Digital Output (DO): Outputs HIGH or LOW signal depending on the brightness threshold (set by the onboard potentiometer)

Adjustable Sensitivity: Onboard potentiometer allows users to set custom threshold levels for digital output

Onboard Indicator LED: Visual feedback when light level crosses the set threshold

Standard 4-Pin Interface: VCC, GND, AO, DO for easy wiring and compatibility

Operating Voltage: 3.3V to 5V – works well with Arduino, ESP32, Raspberry Pi, and other boards