LED
LCD
Product Overview
The 12mm LDR is the “heavyweight” of photoresistors. Its large diameter isn’t just for show—it allows the component to dissipate more heat and react more reliably to light changes in challenging environments. If your project involves tracking low-level moonlight or requires a sturdy sensor that won’t be affected by tiny shadows, the 12mm version is the professional solution. It offers a wider dynamic range, making it easier to calibrate for specific lux levels.
How to Use & Connections
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Maximum Exposure: The 12mm head is ideal for mounting behind lenses or in weather-proof enclosures for outdoor use.
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Stable Analog Output: Due to the large sensing area, the analog signal is less “noisy” than smaller versions, providing smoother data for microcontrollers.
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Versatility: Can be used directly with transistors to drive relays, or connected to an Arduino analog pin using a 10K-50KΩ resistor.
Technical Specifications
| Feature | Specification |
| Diameter | 12mm |
| Light Resistance (10 Lux) | 5KΩ – 15KΩ (Lower resistance for higher sensitivity) |
| Dark Resistance (0 Lux) | 2MΩ – 10MΩ (Ultra-low leakage) |
| Max Voltage | 200V DC |
| Max Power Consumption | 250mW (Highest in its class) |
| Peak Wavelength | 560nm |
| Response Time | ~20ms (Rise), ~30ms (Decay) |
Key Features
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Industrial Grade Sensitivity: Best-in-class performance for detecting minimal changes in ambient light.
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Higher Power Rating: Can handle more current than 5mm or 10mm versions, making it more robust in simple analog circuits.
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Wide Field of View: Captures light from a broader angle, reducing the need for precise alignment.
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Professional Build: Thicker epoxy coating and stronger leads for long-term durability in outdoor or industrial projects.
