Light dependent resistor

Light dependent resistor

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Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: Light dependent resistor as part of a circuit. 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.

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Keywords: alarm, cadmium sulphide, cds, circuit, component, device, electric, electrical, electronic, electronics, equipment, ldr, light, light dependent resistor, light dependent resistors, light-dependent resistors, mfa board, one, photoconductor, photoresistor, physical, physics, resistance, sensor, single, smoke detector, system, technological, technology

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