Photo-Resistor Sensor (LDR or Photo-cell)

Overview

Meet the Photo-Resistor Sensor (LDR or Photo-cell), a fundamental component for any electronics enthusiast. This small yet powerful light-dependent resistor changes its resistance based on the amount of light it receives. Whether you're building a smart lighting system, a solar tracker, or a simple night light, this sensor is your gateway to light-sensing applications.

Key Features

• Light-Sensitive Resistance: Resistance decreases with increasing light intensity (photoconductive).
• Compact Design: Tiny footprint (2 x 4 x 5mm) fits into tight spaces.
• Wide Voltage Range: Can handle up to 150V, making it versatile for various circuits.
• Low Power Consumption: Max power rating of 100mW ensures energy efficiency.
• Easy to Interface: Works with analog inputs on Arduino, Raspberry Pi, and other microcontrollers.

Technical Specifications

• Model: Photo-Resistor Sensor (LDR)
• Max Power: 100mW
• Max Voltage: 150V
• Dimensions: 2 x 4 x 5mm
• Lead Length: 31mm
• Pin Spacing: 4mm
• Dark Resistance: ~10kΩ
• Light Resistance: ~1kΩ

Applications & Use Cases

• Automatic Night Lights: Detect darkness to turn on LED lights.
• Ambient Light Sensing: Adjust screen brightness or room lighting.
• Security Systems: Trigger alarms when light patterns change.
• Solar Trackers: Orient panels towards maximum sunlight.
• Educational Projects: Teach students about light and resistance.

What's Included

• 1 x Photo-Resistor Sensor (LDR)

Compatibility

• Works with all major microcontrollers: Arduino, Raspberry Pi, ESP32, STM32, and more.
• Can be used in analog circuits without additional components (though a resistor is recommended for voltage dividers).

MOKWN Recommendation

Perfect for beginners and pros alike. Add this sensor to your kit to start experimenting with light-controlled projects. For best results, pair it with a fixed resistor to create a voltage divider circuit. Available now at MOKWN – your trusted electronics store in Egypt.