The LDR Light Sensor Module uses a Light Dependent Resistor (photoresistor) to detect light levels. The resistance of the LDR changes depending on the intensity of light falling on it. In bright light, the resistance decreases, while in darkness it increases. The module includes a comparator circuit (LM393) and provides digital output for easy interfacing with microcontrollers. A built-in potentiometer allows users to adjust the light detection threshold. This sensor is commonly used in automatic street lights, light detection systems, smart lighting, and environmental monitoring projects. Key Features Detects light intensity Adjustable sensitivity using potentiometer Digital output signal Onboard power and status LED indicators Compact and easy to interface Compatible with Arduino and other microcontrollers Technical Specifications Parameter Value Operating Voltage 3.3V – 5V Sensor Type Light Dependent Resistor (LDR) Output Type Digital Comparator IC LM393 Sensitivity Adjustable Pin Configuration Pin Description VCC Power Supply (3.3V–5V) GND Ground DO Digital Output
