5MM 5537 LDR Photosensitive Resistor
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![5 mm LDR photoresistor in circuit]()
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5MM 5537 LDR Photosensitive Resistor
Available:In Stock
- Product SKU: KG1050
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₹ 9
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Specification
Description
5MM 5537 LDR Photosensitive Resistor
The 5MM 5537 LDR Sensor is a high-quality component designed for building an efficient ldr circuit. This Light Dependent Resistor (LDR), also known as a photoresistor, changes its resistance depending on the intensity of ambient light. As brightness increases, resistance decreases — making it ideal for automation systems like outdoor lighting, solar-powered devices, and brightness-controlled applications. The 5537 LDR sensor performs exceptionally well in both bright and dark environments. In other words, it enables precise light detection and real-time response in various electronic projects. Moreover, this sensor is widely used by students, engineers, and hobbyists for learning and practical implementations due to its simplicity and low ldr sensor price. Built using high-quality Cadmium Sulphide (CdS) photo-conductive cells, the sensor mimics the spectral response of the human eye. Therefore, as the light intensity rises, resistance drops proportionally. This makes it suitable for use in light-sensing applications such as smoke detection, automatic lighting control, counting devices, and security systems. In short, this compact, reliable, and affordable sensor is a must-have for any light-based automation project.Technical Details
- Product Details: Photoresistor
- Maximum Voltage: 150V DC
- Maximum Power Consumption: 100mW
- Environment Temperature: -30°C to +70°C
- Spectral Peak: 540nm
- Bright Resistance (10Lux): 16~50kΩ
- Dark Resistance: 2.0MΩ
- Sensitivity: 0.7 min
- Response Time: Rise 20ms, Down 30ms
- Model: 5537
Analog Applications:
- Camera exposure control
- Auto slide focus – dual cell systems
- Photocopy machines – toner density sensing
- Colorimetric test instruments
- Densitometer systems
- Electronic scales – dual cell configuration
- Automatic gain control (modulated light source)
- Auto-dimming rearview mirror systems
Digital Applications:
- Automatic headlight dimmer circuits
- Nightlight automation control
- Flame-out detection in oil burners
- Streetlight automation systems
- Presence and beam-breaker sensors
- Position sensing modules
Features
- Precisely senses and responds to light intensity
- Easy to connect on breadboards or perfboards
- Compatible with analog/digital ICs and microcontrollers
- Compact, low-cost, and readily available component
- Fast response time and stable performance
- Eco-friendly design and long operational life
- Highly reliable for both DIY and professional use
Applications
- Automatic streetlight control systems
- Camera exposure and brightness adjustment
- Nightlight and home automation circuits
- Flame detection and safety sensors
- Position and presence monitoring modules
- Light-activated alarms and detectors
- Interactive educational electronics
- Solar-powered and IoT lighting solutions
- Industrial light control automation
- Display and screen brightness control
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 | 0.5 | Rise:30 / Fall:30 |
| 5516 | 150 | 100 | -30~+70 | 540 | 5–10 | 0.5 | Rise:30 / Fall:30 |
| 5528 | 150 | 100 | -30~+70 | 540 | 10–20 | 1 | Rise:20 / Fall:30 |
| 5537 | 150 | 100 | -30~+70 | 540 | 20–30 | 2 | Rise:20 / Fall:30 |
| 5549 | 150 | 100 | -30~+70 | 540 | 100–200 | 10 | Rise:20 / Fall:30 |
Drawing (mm)
Package Includes
- 1 × 5MM 5537 LDR Photosensitive Resistor
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