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  2. Timer - Wikipedia

    en.wikipedia.org/wiki/Timer

    A timer or countdown timer is a type of clock that starts from a specified time duration and stops upon reaching 00:00. An example of a simple timer is an hourglass. Commonly, a timer triggers an alarm when it ends. A timer can be implemented through hardware or software. Stopwatches operate in the opposite direction, upwards from 00:00 ...

  3. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The Shortt–Synchronome clock, an electrical driven pendulum clock designed in 1921, was the first clock to be a more accurate timekeeper than the Earth itself. [167] A succession of innovations and discoveries led to the invention of the modern quartz timer. The vacuum tube oscillator was invented in 1912. [168]

  4. Flip clock - Wikipedia

    en.wikipedia.org/wiki/Flip_clock

    Flip clock. A flip clock (also known as a "flap clock") is an electromechanical, digital time keeping device with the time indicated by numbers that are sequentially revealed by a split-flap display. The study, collection and repair of flip clocks is termed horopalettology (from horology – the study and measurement of time and palette – and ...

  5. Countdown - Wikipedia

    en.wikipedia.org/wiki/Countdown

    A countdown is a carefully devised set of procedures ending with launch of a rocket. Depending on the type of vehicle used, countdowns can start from 72 to 96 hours before launch time. There are two countdowns proceeding simultaneously: The T-minus clock, a schedule of planned activities prior to launch (T−0), and.

  6. Pencil detonator - Wikipedia

    en.wikipedia.org/wiki/Pencil_detonator

    Pencil detonators are colour-coded to indicate the nominal time delay, which can range from 10 minutes through to 24 hours. No. 10 delays were normally issued in a tin of 5, all of the same delay, while L-delays were issued in a larger tin which included a mixture of different delays to suit a variety of operations. The time delay of a No. 10 ...

  7. FarmVille Spring Countdown contents revealed - AOL

    www.aol.com/news/2011-03-11-farmville-spring...

    Just last night, the Spring Countdown was launched in FarmVille, which is a new 12-day event that will see you asking your friends for one exclusive item each day of the countdown. If you can ...

  8. Shot clock - Wikipedia

    en.wikipedia.org/wiki/Shot_clock

    A shot clock in an NCAA basketball game, shown as the red LED digits above the basket. A shot clock is a countdown timer used in a variety of games and sports, indicating a set amount of time that a team may possess the object of play before attempting to score a goal. Shot clocks are used in several sports including basketball, water polo ...

  9. Alarm clock - Wikipedia

    en.wikipedia.org/wiki/Alarm_clock

    This is an accepted version of this page This is the latest accepted revision, reviewed on 11 October 2024. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...

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