LDR Light Sensor Module

LDR Light Sensor – Simple and Effective Ambient Light Detection for Arduino and IoT

The LDR (Light Dependent Resistor) is a passive sensor whose resistance decreases with increasing light intensity. It’s widely used for detecting light levels in various electronics and IoT applications due to its low cost and easy integration.

This sensor can be connected to Arduino, ESP32, or other microcontrollers through an analog input to measure light intensity. It’s ideal for automatic lighting control, solar trackers, brightness adjustment, and environmental monitoring in Bangladesh.

Key Features:

• Detects ambient light intensity

• Resistance decreases with increasing light

• Operating Voltage: 3.3V to 5V (depends on circuit)

• Simple analog output for microcontroller ADC

• Low cost and easy to use

• Compact and durable design

Applications:

• Automatic street and room lighting

• Solar energy systems and trackers

• Brightness adjustment for displays

• Smart agriculture and environmental monitoring

• Educational and hobbyist electronics projects in Bangladesh

The LDR sensor is a fundamental component for any light-sensitive electronics and IoT system requiring cost-effective and simple light detection.