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Merge: date=February 2008 A timer is a specialized type of clock. A timer can be used to control the sequence of an event or process. Whereas a stopwatch counts upwards from zero for measuring elapsed time, a timer counts down from a specified time interval, like a sand clock.

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Wikipedia About Timer

Merge: date=February 2008 A timer is a specialized type of clock. A timer can be used to control the sequence of an event or process. Whereas a stopwatch counts upwards from zero for measuring elapsed time, a timer counts down from a specified time interval, like a sand clock.

Timer.jpg

Timers can be mechanical, electromechanical, digital, or even software, since most computers include digital timers of one kind or another.

Mechanical Timers

Early mechanical timers used typical clockwork mechanisms, such as an escapement and spring to regulate their speed. Inaccurate, cheap mechanisms use a flat beater that spins against air resistance. Mechanical egg-timers are usually of this type.

More accurate mechanisms resemble small alarm clocks. The chief advantage is that they require little battery/electrical power, and can be stored for long periods of time. The most widely-known application is to control explosives.

Electromechanical timers

Electromechanical timers have two types. A thermal type has a metal finger made of two metals with different rates of thermal expansion (steel and bronze are common). An electric current flows through this finger, and heats it. One side expands less than the other, and an electrical contact on the end of the finger moves away from an electrical switch contact, or makes a contact (both types exist). The most common use of this type is now in the "flasher" units that flash turn signals in automobiles, or sometimes in Christmas lights.

Another type of electromechanical timer (a cam timer) uses a small synchronous AC motor turning a cam against a comb of switch contacts. The AC motor is turned at an accurate rate by the alternating current, which power companies carefully regulate. Gears slow this motor down to the desired rate, and turn the cam. The most common application of this timer now is in washers, driers and dishwashers. This type of timer often has a friction clutch between the gear train and the cam, so that the cam can be turned to reset the time.

Electromechanical timers survive in these applications because mechanical switch contacts are still less expensive than the semiconductor devices needed to control powerful lights, motors and heaters.

In the past these electromechanical timers were often combined with electrical relays to create electro-mechanical controllers. Electromechanical timers reached a high state of development in the 1950s and 60s because of their extensive use in aerospace and weapons systems. Programmable electromechanical timers controlled launch sequence events in early rockets and ballistic missiles.

Digital Timers

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News about Timer

Twitter Goes to a Washington Dinner (a.k.a. #nerdprom)

Time MagazineWhat do you get when you combine journalists, politics, celebrities and the latest in social networking?http://www.time.com/time/nation/article/0,8599,1897138,00.ht...

Sweden powers past Team USA to win bronze at Worlds

The Sports NetworkSweden powers past Team USA to win bronze at Worldshttp://www.sportsnetwork.com/merge/tsnform.aspx?c=sportsnetw...

Roseanne Colletti: First-Time Buyer

The Huffington PostNicole and Bryan are buying a house. I hear about this a lot since I work with Nicole and I've bought three times and refinanced...http://www.huffingtonpost.com/roseanne-colletti/first-time-b...

High schools may use replay in championship games

Daily RecordINDIANAPOLIS (AP) — Instant replay has been approved starting next season for last-second shots in high school basketball championship games.http://www.dailyrecord.com/article/20090510/UPDATES01/905100...

Rachael Freed: The Most Important Letters We Will Ever Write: Memory and Meaning - Mother's Day

The Huffington PostRealizing that life is fragile we feel the urgent need to document our legacies to help shape this unfolding new world.http://www.huffingtonpost.com/rachael-freed/the-most-importa...

News about Timer

Lotus 1.0 aids meditation with multiple timers

MacNNBravoBug Software has introduced a new meditation aid for the Mac, Lotus 1.0 . The software features a three-phase timer designed specifically for meditation practices, with a choice between over a dozen built-in signal chimes, or MP3s provided by ... http://www.macnn.com/print/57895

Bad News for Bank of America, Says Market Timer Frank Kollar

TradingMarkets.comBAC closed Wednesday, October 8, at $22.10 a share, down from $38.13 a share only five days ago. It is just below this level where things get dicey. There is an obvious support level at $20 a share, the July lows. Just below, at $18.15 a share, is ... http://www.tradingmarkets.com/.site/news/Stock%20News/193128...

Recap: Phoenix vs. Columbus

The StateMueller connected on a one-timer and put the biscuit in the basket for a 2-0 lead with 1:47 left in the opening stanza. The Blue Jackets made it a one-goal game as Christian Backman and Jakub Voracek assisted Brassard on a power play snap shot that ... http://www.thestate.com/408/story/552773.html

Flyers fall to minor league affiliate Phantoms in final game at ...

ESPN.comGagne gave the Flyers a 1-0 lead on a one-timer late in the first period, before Maroon assisted on Jared Ross' power-play goal in the second to tie the score. Maroon then knocked a loose puck past Jean-Sebastien Aubin midway through the third period ... http://sports.espn.go.com/nhl/recap?gameId=281007061

Radio Golf

Guardian UnlimitedBut Wilks' plans are threatened by a pesky old-timer who claims that a house standing on the development site is legally his. Wilks's business partner argues that they should demolish and be damned. Wilks himself initially takes the same line, but is ... http://www.guardian.co.uk/stage/2008/oct/08/theatre2

Search results for Timer

Timer (Java 2 Platform SE v1.4.2)

public class Timer extends Object. A facility for threads to schedule tasks for future execution in a background thread. Tasks may be scheduled for one-time execution, or for ... http://java.sun.com/j2se/1.4.2/docs/api/java/util/Timer.html

Class Timer

Two other great timers (Virtual Stopwatch, Virtual Timer) can be found at www.timeme.comhttp://www.vickiblackwell.com/timer.html

Timer Class (System.Web.UI)

Performs asynchronous or synchronous Web page postbacks at a defined interval. ... AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level ... http://msdn.microsoft.com/en-us/library/system.web.ui.timer....

Timer (Java 2 Platform SE v1.4.2)

public class Timer extends Object implements Serializable. Fires one or more action events after a specified delay. For example, an animation object can use a Timer as the trigger ... http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/Timer.ht...

Twitter / timer

Twitter is a free social messaging utility for staying connected in real-time ... Hey there! timer is using Twitter. Twitter is a free service that lets you keep in touch with ... http://twitter.com/timer
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Videos found for Timer

The Daily Green Tip: TV Sleep Timer...

The Daily Green Tip: TV Sleep TimersUse the sleep timer on your TV. That way you won't waste electricity if you fall asleep with the TV on.Windows Media - Video

Old Timer Raider Interview

Old Timer Raider InterviewWillie Brown, Jack Tatum, George Atkinson, Skip Thomas reminisce on their Black and Silver.Flash - Video

Uses of a timer water heater

Uses of a timer water heaterLearn the uses of a timer water heater in this video. For more info, visit http://AsktheBuilder.comFlash - Video

Insane Hockey (NHL) Goals ( Dekes ,...

Insane Hockey (NHL) Goals ( Dekes , Shootout , Falling , One Timer ) Awesome CompilationMusic : Preliator by Globus - Players List In Order - - Rick...Flash - Video

Obama: A Market Timer?

Obama: A Market Timer?President Obama says stocks are a "good deal" right now. The Fast Money traders and Daniel Clifton, of Strategas Research Partners, discuss.Flash - Video

Answers for Timer

vampire_ryooshitimer......?vampire_ryooshiI dont know ,but i dont understand why there are many many answers always give www.logabc.com for questions (like appelee and god_is_gi...??)CooperWhat do the following electrical ratings mean on a digital timer?CooperYou are not talking about the right concern. Voltage is a fixed number. You need to understand the 3 components of electricity: Voltage is force that moves the electricity (in Volts) Current is th...TimHow do I build an electronic timer to trigger multiple dvd players?TimYou could use a programmable remote control with a built-in timer. The Sony one (link below) lets you program up to 8 different timers. I'm sure there are others out there that aren't quite as expen...MyraHow do you set timer for light which is used in aquarium?Myrayes depending on what kind do you have the instructions?Tina RHow do I turn off the timer on my microwave? I turned off the microwave but the timer is still on?Tina Rif you unplugged it i would say it should go off... try pressing stop or turning the dial to zero... tho i would say if you already unplugged it and it still goes that its haunted. no just joking but...
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