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Light dependent resistor

Light dependent resistor

T355/0248

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Credit

ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY

Caption

Light dependent resistor. This component is a sensor usually made from cadmium sulphide (CdS). Light levels affect the electrical resistance of CdS. The more light falling on the resistor, the lower its resistance and the greater the electrical current. Light dependent resistors (LDRs) are used in smoke detectors, automatic lighting systems and alarm systems.

Release details

Model release not required. Property release not required.

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