4-Pin LDR Light Sensor Module for Arduino

The 4-Pin LDR Light Sensor Module is a light-dependent resistor module that measures ambient light levels. It features both analog and digital outputs — the analog pin provides variable voltage according to light intensity, while the digital pin gives a HIGH/LOW signal based on the set threshold (adjustable via the onboard potentiometer).
It is widely used in automation, robotics, and smart lighting applications.

Features:

• Operating Voltage: 3.3V – 5V

• Output: Analog (AO) and Digital (DO)

• Onboard LM393 comparator for digital output

• Adjustable sensitivity using potentiometer

• Power indicator LED and output status LED

• Compact, easy-to-use 4-pin interface (VCC, GND, AO, DO)

Applications:

• Automatic light control systems

• Light-following robots

• Day/night detection

• Smart home automation

• Energy-saving lighting projects