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Home / Sensors & Modules / 3mm LDR Sensor Light Dependent Resistor
3mm LDR Sensor Light Dependent Resistor

The LDR Sensor Light Dependent Resistor is a photoresistor whose resistance decreases as light intensity increases.

3mm LDR Sensor Light Dependent Resistor

SKU 2033 Category Sensors & Modules

₹10.00 (Excl GST)

excl. GST*

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Quantity Discount Discounted price
10 - 29 2.5% ₹9.75
30 - 69 5% ₹9.50
70 - 100 7.5% ₹9.25

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LDR Sensor Light Dependent Resistor

The LDR Sensor Light Dependent Resistor is a photoresistor whose resistance decreases as light intensity increases. Available in 3mm and 5mm sizes, it is commonly used in automatic lighting, light meters, and sensor circuits.


Key Features

  • 5mm package
  • Photoresistive element
  • Wide resistance range
  • Fast response time
  • Low cost

Technical Specifications

Parameter Specification
Diameter 5mm
Type Photoresistor (CdS)
Dark Resistance ~1MΩ
Light Resistance ~5-10kΩ @ 10 lux
Max Voltage 150V
Power 100mW

Applications

  • Light sensing circuits
  • Automatic street lights
  • Camera exposure meters
  • Toy circuits

Important Notes

  • Use in voltage divider with fixed resistor
  • Response time: ~10ms rise, ~100ms fall
  • Not precise for lux measurement
  • Sensitivity varies with temperature

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