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Photoresistor

en.wikipedia.org/wiki/Photoresistor

A photoresistor is a light-controlled variable resistor. The resistance of a photoresistor ... A photoresistor is made of a high resistance semiconductor. In the dark, a photoresistor can have a res...

What Are Photocells Made of? | eHow

www.ehow.com/info_10045542_photocells-made-of.html

... a measurable electrical current; in others, it changes the electrical resistance. Practical photocells are made of these substances, including the elements...

How do photoelectric cells work? - Explain that Stuff

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

Jan 27, 2016 ... Photo: A solar panel made from photovoltaic cells. ... detects how much light is reflected back with a photocell, and then sifts the pupa into one ...

BBC - GCSE Bitesize: Photocells

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

A secondary school revision resource for OCR GCSE Science about living for the future and collecting energy from the sun.

Photocells

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

Photocells. Photocells act as light sensors. Inlike infrared sensors that are good for line followers or detecting the presense of an object, photocells are good ...

Simple Homemade Photocell.

www.sparkbangbuzz.com/els/photocell-el.htm

Sep 12, 2003 ... This is a copper oxide photocell and is very simple to make using materials ... One photocell that I made could give a whopping 50 mv increase ...

Solar cells - The Creative Science Centre - by Dr Jonathan P. Hare

www.creative-science.org.uk/solarcells.html

Solar cells can be made very thin and flexible and have even been fabricated into clothes ... A photo cell can be made by connecting wires to a small piece of ...

Photocell tutorial! - Instructables

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

They are are often referred to a CdS cells (they are made of Cadmium-Sulfide), light-dependent resistors (LDR), and photoresistors.A Photocell is basically a ...

What is a Photocell? (with pictures)

www.wisegeek.org/what-is-a-photocell.htm

A photocell is a type of sensor that reacts to light or electromagnetic energy. ... A photoresistor may be either intrinsic, such as those made of silicon, in which ...

How does a photocell work? | Reference.com

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

A photocell is made up of a semiconductor, the working of which is dependent on the intensity of incident light. When the amount of light exceeds a certain ...

Answers
What Are Photocells Made of?
When light shines on an object, the energy in the light stirs up the atoms in the material. In a few substances, the electrons in the atoms move enough to generate a measurable electrical current; in others, it changes the electrical... More »
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