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Accessory Type:Photo Cell


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Manufacturer Part No:
Newark Part No.:
Technical Datasheet:
161   Datasheet
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Photo Cell

MCU & Sensor Evaluation & Development Boards


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Technical Docs (1)

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CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
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Product Overview

The 161 Cds(cadmium-sulphide) photoresistor is a tiny LED sensor device that changes light intensity due to change in resistance. To use, connect one side of the photo cell to power and the other side to microcontroller analogue input pin. Then connect a 10K pull down resistor from analogue pin to ground. The voltage on the pin will be 2.5V or higher when it light out and near ground when it is dark.
  • Dimension is 4.46mm x 5mm x 2.09mm (L x W x H)
  • Resistance is 200KΩ in dark and 5 to 10KΩ in light
  • CdS cells respond to light wavelength of 400nm (violet), 600nm (orange), 520nm (green).


Sensing & Instrumentation, Consumer Electronics, Portable Devices

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