5MM 5506 LDR Photosensitive Resistor
- Product SKU: KG1047
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Specification
Description
The 5MM 5506 ldr light sensor is a high-quality ldr photoresistor that changes resistance with varying ambient light intensity. This Light Dependent Resistor (LDR) is widely used in light-sensing applications ldr light sensor including automatic outdoor and indoor lighting systems.
As light exposure on the sensor’s surface increases, its resistance decreases—allowing the circuit to detect brightness changes effectively. This makes it an ideal component for creating automatic ON/OFF lighting systems and other responsive designs.
The LDR 5MM sensor works efficiently in both bright and dark conditions. Since it mimics the response of the human eye, it performs reliably in a range of lighting environments. In other words, when the light on the sensor increases, the resistance across its two leads decreases.
This component consists of two Cadmium Sulphide (CdS) photo-conductive cells with a spectral response similar to that of the human eye. As light intensity rises, the cell resistance falls, ensuring smooth detection and fast response. Common uses include smoke detection, automatic lighting control, batch counting, and burglar alarm systems.
Technical Details of ldr light sensor
- Light Resistance: ~2–5 K Ω
- Dark Resistance: ~200 K Ω
- Max Voltage: 150 V
- Max Power: 100 mW
- Spectral Peak: 540 nm
- Model: 5506
Analog Applications:
- Camera exposure control
- Auto slide focus – dual cell
- Photocopy machines – toner density measurement
- Colorimetric test equipment
- Densitometer systems
- Electronic scales – dual cell type
- Automatic gain control – modulated light source
- Automated rear-view mirror systems
- ldr light sensor
Digital Applications:
- Automatic headlight dimmer
- Nightlight control circuits
- Oil burner flame-out detection
- Streetlight automation systems
- Absence / presence (beam breaker) sensors
- Position detection sensors
Features
- Accurately senses changes in light intensity
- Easy to mount on a breadboard or perfboard
- Compatible with microcontrollers and analog ICs
- Small, lightweight, inexpensive, and reliable
- Fast response speed with high safety performance
- Environmentally friendly and energy efficient
- Excellent reliability and long operating life
Applications
- Automatic streetlight control and smart lighting
- Camera exposure and brightness control
- Nightlight and home automation systems
- Flame detection and fire alarm triggers
- Position and motion detection sensors
- Light-based security or intrusion alarms
- Interactive electronic toy circuits
- Solar-powered and daylight-driven lighting
- Industrial automation light control systems
- Display brightness auto-adjustment
Specifications
| Model | Max Pressure (VDC) | Max Power (mW) | Ambient Temp (°C) | Spectral Peak (nm) | Bright Resistance (Ω) | Dark Resistance (MΩ) | Response Time (ms) |
|---|---|---|---|---|---|---|---|
| 5506 | 150 | 100 | -30 ~ +70 | 540 | 4–7 KΩ | 0.5 MΩ | Rise: 30 Fall: 30 |
| 5516 | 150 | 100 | -30 ~ +70 | 540 | 5–10 KΩ | 0.5 MΩ | Rise: 30 Fall: 30 |
| 5528 | 150 | 100 | -30 ~ +70 | 540 | 10–20 KΩ | 1 MΩ | Rise: 20 Fall: 30 |
| 5537 | 150 | 100 | -30 ~ +70 | 540 | 20–30 KΩ | 2 MΩ | Rise: 20 Fall: 30 |
| 5549 | 150 | 100 | -30 ~ +70 | 540 | 100–200 KΩ | 10 MΩ | Rise: 20 Fall: 30 |
Drawing (mm)
Package Includes
- 1 × 5MM 5506 LDR Photosensitive Resistor
