LDR Sensor Module

The LDR sensor module detects light and measures how bright it is. When theres light, the output is high, and when theres no light, its low. You can change how sensitive it is using a small dial (potentiometer).

This light detection sensor has an M3 mounting hole for easy attachment and comes with an LDR for accurate readings. The LDR module also has a power LED and a status LED to show if its working, making it great for checking how bright the surroundings are.

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Features:

• Adjustable sensitivity via blue digital potentiometer adjustment
• Digital output range: 0V to 5V
• Adjustable trigger level from preset
• LEDs indicating output and power (Power indicator in red and digital switch output indicator in green)
• Uses LM393 comparator chip for stability
• Easy to install with an M3 mounting hole for attachment
• Suitable for detecting ambient brightness and light intensity
• Digital output for easy integration with microcontrollers
• Comes with a power LED and status LED as indicators

Applications:

• Control lights with LDR sensors.
• Adjust streetlights for energy savings.
• Trigger alarms in security.
• Monitor sunlight for plants.
• Optimize camera settings.

Pinout:

How to Use:

• A photosensitive resistor module most sensitive to environmental light intensity is generally used to detect the ambient brightness and light intensity.
• Module light conditions or light intensity reach the set threshold, DO port output is high when the external ambient light intensity exceeds a set threshold, the module D0 output is low;
• Digital output D0 is directly connected to the MCU, and detects high or low TTL, thereby detecting ambient light intensity changes;
• Digital output module DO can directly drive the relay module, which can be composed of a photoelectric switch;

Read our blog explaining how LDR works.