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Adafruit Photo cell (CdS photoresistor) [ADA161] in Saudi Arabia Adafruit Photo cell (CdS photoresistor) [ADA161] in Saudi Arabia Adafruit Photo cell (CdS photoresistor) [ADA161] in Saudi Arabia

Adafruit Photo cell (CdS photoresistor) [ADA161]

SAR 37
– 1 +

Special Features

  • CdS cells are little light sensors. As the squiggly face is exposed to more light, the resistance goes down. When its light, the resistance is about ~1KΩ, when dark it goes up to ~10KΩ.
  • To use, connect one side of the photo cell (either one, its symmetric) to power (for example 5V) 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.
  • Length: 4.46mm/0.18in, Width: 5mm/0.20in, Height: 2.09mm/0.08in, Weight: 0.25g/0.01oz

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