Adafruit Photo Cell (CdS Photoresistor)

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Product Code: 91370
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Product Description
  • Adafruit CdS photoresistor
  • Little light sensors
  • The resistance goes down as it is exposed to light
$1.50
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Adafruit Photo Cell (CdS Photoresistor) info

Adafruit Photo cell (CdS Photoresistor)is a CdS cell which are little light sensors. As it is exposed to more light, the resistance goes down. When its light, the resistance is about 5-10KΩ, when dark it goes up to 200KΩ.

To use, connect one side of the photo cell to power and the other side to your microcontroller's analog input pin. Then connect a 10K pull-down resistor from that analog pin to ground. The voltage on the pin will be 2.5V or higher when its light out and near ground when its dark.

 

Adafruit Photo Cell (CdS Photoresistor) - General Specifications

  • Adafruit CdS photoresistor
  • Little light sensors
  • The resistance goes down as it is exposed to light

 

Adafruit Photo Cell (CdS Photoresistor) - Technical Specifications

  • Length: 4.46mm/0.18in
  • Width: 5mm/0.20in
  • Height: 2.09mm/0.08in
  • Weight: 0.25g/0.01oz

 

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References

Adafruit Websitehttp://www.adafruit.com/products/161

 

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