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A switch is a mechanical device used to connect and disconnect an electric circuit at will. Switches cover a wide range of types, from subminiature up to industrial plant switching megawatts of power on high voltage supply and distribution lines.

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Wikipedia about switch

A switch is a mechanical device used to connect and disconnect an electric circuit at will. Switches cover a wide range of types, from subminiature up to industrial plant switching megawatts of power on high voltage supply and distribution lines.

In applications where multiple switching options are required (e.g., a telephone service), mechanical switches have long been replaced by electronic switching devices which can be automated and intelligently controlled.

The switch is referred to as a "gate" when abstracted to mathematical form. In the philosophy of logic, operational arguments are represented as logic gates. The use of electronic gates to function as a system of logical gates is the fundamental basis for the computeri.e. a computer is a system of electronic switches which function as logical gates.

Tactile%20switches.jpg

A railroad switch is not electrical, but a mechanical device to divert a train from one track to another.

Contacts

On-Off%20Switch.jpg

Sometimes the contacts are plated with noble metals. They may be designed to wipe against each other to clean off any contamination. Nonmetallic conductors, such as conductive plastic, are sometimes used.

Actuator

The moving part that applies the operating force to the contacts is called the actuator, and may be a toggle or dolly, a rocker, a push-button or any type of mechanical linkage (see photo).

Contact arrangements

Tpst.jpg

A pair of contacts is said to be 'closed' when there is no space between them, allowing electricity to flow from one to the other. When the contacts are separated by an insulating air gap, an air space, they are said to be 'open', and no electricity can flow at typical voltages.

Switches can be and are classified according to the arrangement of their contacts in electronics fields but electricians in the electrical wiring service business and their electrical supplier industries use different nomenclature, such as "one-way", "two-way", "three-way" and "four-way" switcheswhich have different meanings in North American and British cultural regions as is delineated in the table below.

Some contacts are normally open (Abbreviated "n.o." or "no") until closed by operation of the switch, while others are normally closed ("n.c. or "nc") and opened by the switch action, where the abbreviations given are commonly used on electronics diagrams for clarity of operation in assembly, analysis or troubleshooting. The serve to synchronize meaning with possible mistakes in wiring assembly, where wiring part of switch one way and part another (usually opposite) way will pretty much guarantee things won't work as designed.

Search results for Switch

PHP: switch - Manual

This is exactly what the switch statement is for. ... If you have a switch inside a loop and wish to ... Note: Note that switch/case does loose comparision. ...us3.php.net/switch

Apple - Get a Mac

Campaign to encourage users to switch from PCs to Macs.www.apple.com/switch

E-Switch - News

E-Switch provides quality tact, pushbutton, toggle, and more switches to the ... E-Switch Announces New Sub-Miniature Snap Action Switch ...e-switch.com/index.php?contentID=264

Switch

An electronic art journal from the CADRE Institute at San Jose State University.switch.sjsu.edu/

What is switch? - a definition from Whatis.com

In a telecommunications network, a switch is a device that channels incoming ... larger networks, the trip from one switch point to another in the network is ...searchtelecom.techtarget.com/sDefinition/0,,sid103_gci213079...

Images found for Switch

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News about Switch

Some Spanish-language TV stations want to delay switch to digital

ABC 7 El PasoFor months we've been hearing about the big switch from analog TV to digital TV. But now the U.S. Congress might delay the conversion here in the Borderland.http://www.kvia.com/global/story.asp?s=9022229

Faulty switch likely cause of truck fire

The Sudbury StarA defective switch was the likely cause of a fire that destroyed 1996 Ford F150 pickup truck Sunday at a home on Emery Road in [...]http://thesudburystar.com/ArticleDisplay.aspx?e=1202073

GenoaBank will have a switch night Oct. 2

Port Clinton News HeraldGenoaBank will host a switch night called Fall into a New Account. GenoaBank will open late from 4 to 7 p.m., Thursday, Oct. 2 at all branch locations for new and current customers.http://www.portclintonnewsherald.com/apps/pbcs.dll/article?A...

Safety Gate Switch is magnetically operated.

ThomasNetPSENslock series combines secure safety gate monitoring and non-contact magnetic interlock. Electro-magnetic holding force of 500 N prevents unintentional opening of swing/sliding gates, and transponder technology is manipulation-proof because switch and actuator are different items. Tolerant to gate misalignment, IP67-rated series is designed for applications up to SIL3 and offers flexible ...http://news.thomasnet.com/fullstory/549405

Florida Department of Transportation Deploys Glimmerglass to Switch Intelligent Transportation System Network

Centre Daily TimesGlimmerglass announced today that the Florida Department of Transportation District 5 deployed its Intelligent Optical Switch to further enhance the resiliency and flexibility of Florida's Intelligent Transportation System (ITS). The ITS program endeavors to provide a safe transportation system that ensures the mobility of people and goods, enhances economic prosperity, and preserves the quality ....http://www.centredaily.com/business/technology/story/842903....

News about Switch

Medicines shortage looms as winter approaches

Times OnlineAt the same time, the switch to a new drug-pricing regime, in which the NHS will pay roughly 5 per cent less for medicines in January than now, is forcing drug wholesalers to run down their stocks before Christmas. They are trying to avoid a ... http://business.timesonline.co.uk/tol/business/industry_sect...

BBC 'horror film' faces religious outcry

Daily TelegraphIt doesn't show a wholly positive message, otherwise it would be Songs Of Praise and people would switch off. It is going out at nine, an acknowledged watershed." When asked whether the Mother Teresa scene depicted her being exorcised, he said: "She ... http://www.telegraph.co.uk/news/uknews/3184460/BBC-horror-fi...

Switch from left to right should help

Boston GlobeBefore anyone blows a gasket about J.D. Drew being out of the lineup, here’s something to think about: the Red Sox went 25-13 against left-handed starters this season – only the Los Angeles Angels were better among American League teams – and ... http://www.boston.com/sports/columnists/massarotti/2008/10/s...

I played great apart from that two-yard miss, says Iwelumo

Guardian UnlimitedWhen I go upstairs, I'll switch off and have a bit of time to myself." If they had switched off the giant screens at Hampden then Scotland's second-half momentum might not have been completely lost. So astonishing was Iwelumo's miss that the assistant ... http://www.guardian.co.uk/football/2008/oct/13/worldcup2010q...

SABATHIA, BURNETT FIGURE IN BOMBERS' OFFSEASON PLANS

New York PostThey could see if the White Sox have soured on Nick Swisher, who struggled this season, but has a good eye, defensive versatility and is a switch-hitter. Nick Johnson's agent, Rex Gary, said his client will be completely healed by spring training ... http://www.nypost.com/seven/10122008/sports/yankees/sabathia...

Search results for Switch

Cisco Switches - Cisco - Cisco Systems

Cisco switches help maximize network value by providing optimal support for business requirements while delivering superior investment protection.http://www.cisco.com/en/US/products/hw/switches/index.html

SWITCH's Webcam - Zürich, Switzerland

Movable webcam set at Central, with views of the Limmat river and bridges, main station and National Museum. [German, English]http://cam.switch.ch/

Switch Internet - Home Page

Switch Internet ... Switch E-mail. In order for Switch customers to continue to use their Switch mail address, I have sold the domain name to a hosting company, so that this can be ... http://www.switch.com.au/

Download Free Audio File Format Converter Software, Convert Mp3, Wav ...

Switch Audio File Conversion Software Convert and encode audio file formats Switch is a sound file format converter for Windows or Mac. Convert audio files from many different file ... http://www.nch.com.au/switch/

SWITCH- Southeastern Wisconsin Information Technology Exchange

The Southeastern Wisconsin Information Technology Exchange (SWITCH) is a consortium of eight academic libraries in the Milwaukee area sharing a single unified database called ... http://caspian.switchinc.org/
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Videos found for Switch

Toilet Switch

Toilet SwitchHe's a man, she's a woman in the most elemental sense. But will a quickie between them throw off the balance of the universe?Flash - Video

BFocus - Switch/The City

BFocus - Switch/The CityThe girls have a hot dance that's going to make the guys in the club get excited.Windows Media - Video

AC 360: Switch in power?

AC 360: Switch in power?Panelists discuss the impact of Travis Childers defeating his GOP opponent in a Mississippi house race.Windows Media - Video

Switch on to 3D TV

Switch on to 3D TVSamsung's Jermaine Anderson demonstrates a TV with three-dimensional image capability at the CES tech show.Windows Media - Video

Pokemon Diamond & Pearl: Battle Dim...

Pokemon Diamond & Pearl: Battle Dimension - Throwing The Track SwitchDawn and Zoey are traning. Dawn and Zoey begin training to get Dawn in shape for the Solaceon Town ...Flash - Video

Videos found for Switch

Switch and Carry DS Case User Revie...

Switch and Carry DS Case User Review 9629Switch and Carry DS CaseVideopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv.com to find more video product reviews - or ...flash: 0 MB w:400px - h:300px

Kill.Switch User Review 7763

Kill.Switch User Review 7763Review of Namco's Kill.Switch for the Playstation 2 Console. Videopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv.com to ...flash: 0 MB w:400px - h:300px

Footy fans switch to Swans campaign

Footy fans switch to Swans campaignWith Sydney clubs out of this year's NRL Grand Final, footy fans are making the big switch to the Swans' AFL campaign.wmv: 0 MB w:793px - h:608px

Flip the Switch User Review 5686

Flip the Switch User Review 5686Review of Flip the Switch Videopinions are product reviews and demonstrations by the people who use them - in full motion video. Go to Expo TV at www.expotv.com to find more video product reviews - o...flash: 0 MB w:400px - h:300px

my_nifty_light_switch.wmv

my_nifty_light_switch.wmvit. When I went to home depot for a replacement dimmer, they had a pretty sweet one that caught my eye. So, because I'm a geek with free time to kill, here is a video of my light switch: my_nifty_ligh...msmedia: 11.4 MB w:320px - h:240px

Answers for Switch

Cody N

How do switch phone numbers with two different phones with verizon and they are on the same plan?

Cody NGo to www.verizonwireless.com and login click my phone then go to activate existing phone ...both equipments must be off to process online.... the esn is located on the back of the phone you must remo...
Pregalicious Trophy Wife

How to install light switch to turn on wall outlet?

Pregalicious Trophy WifeSwitching a receptacle and installing a switch in a finished room involves fishing wires through the walls. Not an undertaking for the faint at heart. Or the inexperienced. Considers a remote contr...
Themightyleart

What is the best switch to connect a 2nd battery in parallell with battery on car for emergency jumps?

Themightyleartwhat kind of car? did you check the battery? did you check the alternator? did you check the regulator and diodes? anyone check for a short or open circuit?
moofhead

How do you figure out what a light switch controls?

moofheadthe switch may control an outside outlet or light... also the switch may control just the top or bottom outlet of one in the living room . you can remove the wall cover from the switch and use an o...
wife and the hubby

can a transfer switch be intercepted in the feed to a sub panel without a disconnect not being within sight?

wife and the hubbythere is no disconnect sight rule for a sub-panel.that rule is for equipment such as HVAC units,water heater to name just a few. also a sub-panel does not require a main breaker Local code my di...

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