The SP Electron LM393 Photosensitive LDR Sensor Module is a compact and easy-to-use light detection sensor designed for a variety of lighting-based automation and robotics applications. Built around a light dependent resistor (LDR) and an LM393 comparator IC, this module translates ambient light levels into a digital HIGH/LOW output, making it simple to interface with microcontrollers and development boards.

Operating over a 3.3V to 5V DC supply, the module provides a digital output signal that changes state based on the detected light intensity. An onboard potentiometer allows you to adjust the sensitivity threshold, giving you control over when the output switches in response to light conditions. A built-in status LED visually indicates the output state, helping you during testing and debugging.

This LDR sensor module is widely used in light-sensitive controls, night-mode switching, automatic lighting systems, outdoor robotics, energy-saving applications, and ambient light detection. It is compatible with popular platforms like Arduino, Raspberry Pi, AVR, PIC, ARM, DSP, and 8051 microcontrollers, making it perfect for both beginners and experienced developers.

Whether you’re building an automatic street light controller, robot that reacts to light, or a smart lamp system that turns on at dusk, this SP Electron LDR sensor module provides reliable and adjustable light detection for your projects.