The LDR Module LM393 is a compact light detection sensor module designed to detect changes in ambient light intensity. It uses an LDR (Light Dependent Resistor) along with an LM393 comparator and an adjustable potentiometer for setting the desired light detection threshold. The module is suitable for Arduino, Raspberry Pi, microcontroller and DIY electronics projects.

Full Product Description

The LDR Module LM393 Light Sensor is an easy-to-use electronic sensor for detecting the presence or absence of light. The module combines a Light Dependent Resistor (LDR) with an LM393 voltage comparator to provide a convenient digital light detection signal.

The resistance of the LDR changes according to the intensity of light falling on its surface. An onboard adjustable potentiometer allows you to set the sensitivity or light threshold according to your project requirements.

This LDR sensor module can be connected to Arduino boards, Raspberry Pi projects, ESP8266, ESP32 and other microcontroller systems for applications involving automatic lighting, light detection, robotics and environmental sensing.

Its compact PCB design, simple interface and adjustable sensitivity make the LM393 LDR module a practical choice for students, hobbyists, electronics enthusiasts and DIY developers.

Key Features

• LDR-based light detection module
• Built-in LM393 comparator
• Adjustable sensitivity using onboard potentiometer
• Detects changes in ambient light intensity
• Digital output for easy connection to microcontrollers
• Compact and lightweight PCB design
• Suitable for Arduino and other development boards
• Useful for robotics and DIY electronics projects
• Simple 3-pin interface
• Easy to integrate into electronic circuits

Technical Specifications

Note: Operating voltage and electrical specifications can vary slightly between module manufacturers. Please verify the exact specifications of your supplied module before publishing fixed electrical limits.

An LDR (Light Dependent Resistor) changes its resistance according to the amount of light it receives. The LM393 comparator compares the sensor voltage against an adjustable reference level.

By turning the onboard potentiometer, you can adjust the threshold at which the module’s digital output changes state.

This allows the module to be used for simple light/dark detection applications without requiring complicated external circuitry.