LDR Sensor Module

The LDR Sensor Module is a versatile light detection sensor that uses a Light Dependent Resistor (LDR) to measure ambient light levels. The resistance of the LDR changes according to the intensity of light falling on its surface, allowing the module to detect changes in environmental lighting conditions.

This sensor module is widely used in automatic street lights, smart home systems, solar tracking applications, security systems, and various IoT automation projects. With both analog and digital outputs, it can easily interface with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and other development platforms.

The onboard LM393 comparator and adjustable potentiometer allow users to customize the light detection threshold according to their project requirements.

Key Features
Detects ambient light intensity accurately
Analog and digital output support
Adjustable sensitivity using onboard potentiometer
Compatible with 3.3V and 5V systems
Low power consumption
Fast response to light changes
Easy integration with microcontrollers
Compact and lightweight design
Built-in power and output indicator LEDs
Ideal for automation and IoT applications
Technical Specifications
Sensor Type: Light Dependent Resistor (LDR)
Operating Voltage: 3.3V – 5V DC
Output Type: Analog (AO) and Digital (DO)
Comparator IC: LM393
Adjustable Threshold: Yes
Interface: VCC, GND, AO, DO
Response Time: Fast
Operating Temperature: -20°C to +70°C
Applications
Automatic Street Lighting

Automatically turn lights ON at night and OFF during daylight.

Smart Home Automation

Control lighting systems based on room brightness.

Solar Tracking Systems

Detect sunlight intensity for efficient solar panel positioning.

Security Systems

Monitor lighting conditions and trigger alerts when necessary.

Day and Night Detection

Identify day/night transitions for automated control systems.

IoT Projects

Integrate with ESP32 and ESP8266 for cloud-based monitoring and automation.

Educational Projects

Perfect for students learning sensors, electronics, and embedded systems.

Pin Configuration
VCC – Power Supply (3.3V to 5V)
GND – Ground
AO – Analog Output
DO – Digital Output
Package Includes
1 × LDR Sensor Module
Why Choose This LDR Sensor Module?

The LDR Sensor Module is a simple yet powerful solution for measuring ambient light levels in real-time. Its adjustable sensitivity, dual output modes, and broad compatibility make it an excellent choice for beginners, hobbyists, students, and professional developers working on automation, robotics, smart homes, and IoT systems.

Build intelligent light-controlled applications and automation projects with this reliable and affordable LDR Sensor Module.