LM393 Light Sensor Module – Adjustable Light Detection Module

The LM393 Light Sensor Module is a compact and reliable light detection module designed to sense ambient light intensity and convert it into a digital signal for microcontrollers and control systems. It uses an LDR (photoresistor) to detect changes in light levels and an LM393 voltage comparator to provide a stable and fast response output.

The onboard adjustable potentiometer allows precise control over the light sensitivity threshold, making the module suitable for a wide range of applications such as automatic lighting systems, smart home projects, light-activated alarms, robotics, and educational experiments. When the ambient light crosses the preset threshold, the module’s digital output switches state, allowing easy integration with Arduino, ESP8266, ESP32, Raspberry Pi-compatible GPIO logic levels, and other development platforms.

Designed for beginners and professionals alike, this module features power and status indicator LEDs for quick visual feedback, ensuring easy setup, calibration, and troubleshooting. Its small form factor makes it ideal for embedded systems and space-constrained projects.

Key Features:

• LM393 Comparator-Based Design – Ensures stable, fast, and reliable light level comparison.
• Adjustable Sensitivity Control – Built-in potentiometer allows fine-tuning of light detection threshold.
• Digital Output Signal – Provides clean HIGH/LOW output for direct microcontroller interfacing.
• Visual Status Indicators – Onboard LEDs display power status and output trigger state.
• Wide Voltage Compatibility – Operates smoothly with common 3.3V and 5V systems.
• Compact and Project-Ready Module – Ideal for automation, robotics, and educational use.