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Photoresistor - Wikipedia

en.wikipedia.org/wiki/Photoresistor

A photoresistor is a light-controlled variable resistor. The resistance of a photoresistor ... Large CdS Photocell from a street light. ... They are also used in some dynamic compressors together wi...

Photocells

www.me.umn.edu/courses/me2011/arduino/technotes/photocell/photocell.html

Photocells are used in automatic night lights and in street lamps that turn themselves on at night. Sometimes known as photoresistors, photocells are available ...

Uses of Photocells | Sciencing - eHow

www.ehow.com/about_5494652_uses-photocells.html

Photocells are semiconductors that are light detectors. They are essentially light dependent resistors, because they have an output that is proportional to the ...

What Is a Photocell for a Light? - Techwalla.com

www.techwalla.com/articles/what-is-a-photocell-for-a-light

Mar 31, 2015 ... Photocells react to ambient light via a changing electrical resistance. ... Photocells ... Photocells are commonly used in dusk-to-dawn lights.

How do photoelectric cells work? - Explain that Stuff

www.explainthatstuff.com/how-photoelectric-cells-work.html

Nov 29, 2016 ... ... it's used in photovoltaic, photoconductive, and photoemissive cells. ... called photocells)—electronic devices that generate electricity when ...

How does a photocell work? | Reference.com

www.reference.com/science/photocell-work-c32e7061fe01f359

The semiconductor that is used in a photocell is usually of a very high resistance. This allows the photocell to stop the flow of current completely when there is no ...

Photocell-Application of photoelectric effect - City Collegiate

www.citycollegiate.com/physicsXII_photocell.htm

A photocell is a practical application of the phenomenon of photoelectric cell. ... A photocell can be used in any situation where beam of light falling on it is ...

Photocell tutorial! - Instructables

www.instructables.com/id/Photocell-tutorial/

Photocells a.k.a CdS cells, photoresistors, LDR (light dependent resistor). ... For this reason, they shouldn't be used to try to determine precise light levels in lux ...

Photocell | Define Photocell at Dictionary.com

www.dictionary.com/browse/photocell

Photocell definition, a solid-state device that converts light into electrical ... or uses light to regulate the flow of current, as in a photoconductive cell: used in ...

BBC - GCSE Bitesize: Photocells

www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway_pre_2011/living_future/1_collecting_energy1.shtml

Photocells are devices that transfer light energy directly into electrical energy. ... Very large panels of photocells are used to power satellites in orbit around Earth  ...