Function: Light Dependent Resistor (LDR) sensor designed to detect and respond to varying light intensity, providing an analog signal based on ambient brightness levels.

Model: GL5528 5mm photoresistor — known for its high sensitivity and reliable performance in both indoor and outdoor lighting conditions.

Operating Principle: Resistance decreases as light intensity increases, allowing microcontrollers like Arduino to interpret brightness changes easily.

Specifications:

• Dark resistance: ~1MΩ

• Light resistance: 5–10kΩ (under 10 Lux)

• Spectral peak: 540 nm (visible light range)

• Response time: <30 ms

Compatibility: Fully compatible with Arduino, Raspberry Pi, ESP8266, and other analog input microcontrollers for light-sensing applications.

Construction: Compact 5mm sensor head with durable epoxy coating, ensuring protection and stable performance across temperature ranges.

Applications: Ideal for automatic street lights, light-following robots, brightness control systems, alarm sensors, and solar tracking projects.

Design: Simple two-pin interface for easy breadboard or PCB mounting, requiring no complex setup — just connect, read, and calibrate.