Photo-Resistor Sensor (LDR or Photo-cell)


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This is a very small light sensor . It is called light sensor or photocell or LDR (light dependent sensor) or photo-resistor. A photocell changes  resistance depending on the amount of light it is exposed to. These little sensors make great ambient light triggers (when light in the room turns on, do something). 


  • Light resistance : ~1k Ohm
  • Dark resistance : ~10k Ohm
  • Max voltage : 150V
  • Max power: 100mW


  • 2 x 4 x 5mm
  • 4mm between pins
  • 31mm lead length

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Photo-Resistor Sensor (LDR or Photo-cell)


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