The LDR Photosensitive Resistance Sensor Module is a light detection module designed to measure ambient light intensity using a Light Dependent Resistor (LDR). The resistance of the LDR changes based on light exposure, allowing the module to detect brightness levels effectively.

This module provides both analog and digital outputs. The analog output gives real-time light intensity values, while the digital output triggers when light crosses a preset threshold. The onboard potentiometer allows users to adjust sensitivity based on their environment.

It is widely used in automatic lighting systems, day/night detection, smart home automation, and Arduino-based projects. Its compact design and easy interfacing make it ideal for beginners and professionals.