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The LDR (Light Dependent Resistor) sensor is an electronic component that detects and measures the intensity of ambient light. It consists of a photoconductive material that exhibits changes in resistance with variations in light levels. LDR sensors are commonly used in automatic lighting systems, daylight sensing applications, and light level monitoring. They offer a cost-effective and straightforward solution for detecting light and adjusting operations accordingly, contributing to energy efficiency and environmental control.

LDR Sensor

SKU: 108
₹92.00 Regular Price
₹70.00Sale Price
  • Specification

    • Resistance Range: Varies depending on the model, typically in kilo-ohms to mega-ohms.
    • Spectral Response: Sensitivity to specific ranges of light wavelengths (visible or infrared).
    • Dark Resistance: Resistance level in low-light or dark conditions.
    • Light Sensitivity: Range of light levels that the sensor can detect.
    • Dimensions: Varies depending on the model.


    • Power Supply: Connect the VCC or VDD pin of the sensor to the positive supply voltage (3.3V to 5V) of your microcontroller or development board.
    • Ground: Connect the GND pin of the sensor to the ground (0V) of your system.
    • Output Connection: Connect one end of the LDR sensor to an analog input pin of your microcontroller or ADC module. Connect the other end of the LDR sensor to the ground (0V).
    • Voltage Divider: Use a resistor in series with the LDR sensor to create a voltage divider circuit. The resistor value depends on the specific requirements of your application and the resistance range of the LDR sensor. Consult the datasheet or documentation for recommended values.
    • Read Sensor Data: In your microcontroller code, read the analog input from the LDR sensor to obtain light level information.
    • Interpretation: Convert the analog reading to meaningful light intensity values using appropriate calibration or mapping techniques.
    • Thresholds and Actions: Set thresholds based on the desired light levels and trigger actions or control devices accordingly.
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