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A photoresistor or light-dependent resistor (LDR) or photocell is a light-controlled variable resistor. ... A photoresistor is made of a high resistance semiconductor.

Photocell tutorial! - Instructables


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) - wiseGEEK


Nov 12, 2015 ... 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 ...

photoelectric cell - Infoplease


photoelectric cell or photocell, device whose electrical characteristics (e.g., current, voltage, or resistance) vary when light is incident upon it. The most common ...

Solar Cell - Photocell - Arbor Scientific


Mini solar panels, also know as photocells, encased in plastic are perfect for student construction projects. Each cell can ... Made of Crystal Silicon. Save when ...

Overview | Photocells | Adafruit Learning System


Jul 29, 2012 ... Photocells are sensors that allow you to detect light. ... to as CdS cells (they are made of Cadmium-Sulfide), light-dependent resistors (LDR), ...

How are Solar Panels and Photocells used to make Energy


Oct 27, 2011 ... Photocells can be used in places where mains electricity is not easily available. ... Sunlight is made up of tiny packets of energy called photons.

Photocells and their Application | Tutorvista.com


A photocell converts the change in the intensity of light into a change in the electric current. The diagram shows a photocell circuit. The cathode is made of ...

Light Sensor including Photocell and LDR Sensor


Electronics Tutorial about Light Sensor including Photocells, LDR, ... As its name implies, the Light Dependent Resistor (LDR) is made from a piece of exposed ...

How Photocells Work SPN#9 - New York State Energy Research ...


The semiconductors in a photocell are “doped” by replacing some of the atoms ... could be reestablished if extra electrons were made available, filling the “holes.

Popular Q&A
Q: What Are Photocells Made of?
A: Selenium. Experiments conducted in the mid-1800s revealed the element selenium produced electricity when exposed to light. Since then, camera light meters and o... Read More »
Source: www.ehow.com
Helpful Resources

What Are Photocells Made of? | eHow


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

BBC - GCSE Bitesize: Photocells


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

How do photoelectric cells work? - Explain that Stuff


Oct 3, 2014 ... 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 ...

Simple Homemade Photocell.


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 ...