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LDR Light Sensor Module
LDR Light Sensor Module
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The LDR Light Sensor Module detects changes in surrounding light intensity and provides an electrical output that can be read by Arduino, ESP32 and other microcontrollers. Ideal for automatic lighting, robotics, smart home and DIY electronics projects.
Technical Specifications
| Specification | Details |
|---|---|
| Sensor Type | LDR / Light Sensor |
| Sensing Element | Light Dependent Resistor |
| Operating Voltage | Commonly 3.3V–5V |
| Output | Analog / Digital* |
| Sensitivity | Adjustable on common modules |
| Application | Light Detection |
| Interface | VCC, GND, AO, DO* |
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Key Features
Key Features
Detects ambient light intensity
LDR-based light sensing
Adjustable sensitivity on common modules
Analog output
Digital output on supported modules
Easy Arduino integration
Compatible with ESP32
Compact module design
Suitable for automation and robotics
Applications
Applications
Automatic Night Light
Automatic Street Light Prototype
Light-Activated Switch
Smart Home Automation
Robotics
Arduino Projects
ESP32 Projects
IoT Projects
Light Detection
Solar Projects
Energy-Saving Projects
STEM Education
College Projects
Engineering Projects
Package Includes
Package Includes
1 × LDR Light Sensor Module
Compatibility
Compatibility
Frequently Asked Questions
Frequently Asked Questions
What is an LDR?
LDR stands for Light Dependent Resistor. Its resistance changes depending on the amount of light falling on it.
Can I use this with Arduino Uno?
Yes. The module can be connected to Arduino Uno for light-detection projects.
Can I use it with ESP32?
Yes. The analog output can be connected to a suitable ESP32 ADC input.
Can I make an automatic night light?
Yes. Arduino or ESP32 can use the sensor output to switch an LED or suitable lighting circuit when it becomes dark.
Does it measure light in lux?
No. It is intended for relative light detection rather than calibrated lux measurement.
Can I adjust the detection threshold?
Common LDR modules have an onboard potentiometer that allows you to adjust the digital trigger threshold.
