Description
The 5mm 5528 LDR Light Dependent Resistor is a photo-sensitive resistor whose resistance changes according to the amount of light falling on its sensing surface.
When the surrounding environment becomes brighter, the resistance of the LDR decreases. When the environment becomes darker, its resistance increases. This simple operating principle makes the 5528 LDR an excellent component for detecting day/night conditions and measuring relative changes in ambient light.
With a 5mm sensing surface and a typical light resistance of 10–20kΩ at 10 Lux, the LDR can easily be integrated into analog circuits or connected to the analog input of microcontrollers such as Arduino, ESP32, Raspberry Pi Pico, and STM32.
It is commonly used for automatic street lights, night lamps, light-activated switches, brightness control systems, security devices, robotics, and educational electronics projects.
Key Features
- 5528 type Light Dependent Resistor
- 5mm compact sensor size
- Light resistance: 10–20kΩ at 10 Lux
- Resistance decreases as light intensity increases
- High resistance under dark conditions
- Simple two-terminal component
- Easy to use with voltage-divider circuits
- Suitable for analog light detection
- Low-cost solution for light-sensitive projects
- Compatible with Arduino and other microcontrollers
Technical Specifications
- Product Type: Light Dependent Resistor / Photoresistor
- Model/Series: 5528
- Sensor Diameter: Approx. 5mm
- Light Resistance: 10–20kΩ at 10 Lux
- Detection Type: Visible Light
- Output: Variable Resistance
- Number of Pins: 2
- Mounting Type: Through-Hole
- Polarity: Non-polarized
- Resistance Behavior:
- Bright Light: Lower Resistance
- Darkness: Higher Resistance
Package Includes
- 1 × 5mm 5528 LDR Light Dependent Resistor
Applications
- Automatic street lights
- Automatic night lamps
- Light-sensitive switches
- Arduino light sensor projects
- ESP32 and Raspberry Pi Pico projects
- Automatic brightness control
- Security and alarm systems
- Solar lighting systems
- Robotics
- Day/night detection circuits
- Light intensity detection
- Educational electronics projects
Benefits
- Simple and easy to use
- No polarity concerns during installation
- Easily connected using a voltage-divider circuit
- Compact size for small electronic projects
- Suitable for automatic day/night detection
- Compatible with analog microcontroller inputs
- Useful for both beginners and experienced electronics developers
Why Choose This Product?
The 5mm 5528 LDR Light Dependent Resistor provides a simple and affordable solution for detecting changes in ambient light. Its 10–20kΩ resistance at 10 Lux, compact 5mm design, and easy two-pin connection make it suitable for automatic lighting, sensor circuits, Arduino projects, robotics, alarms, and many other light-sensitive electronic applications.
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