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A typical kitchen 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.
Most countdown schedules also include some pre-planned built-in holds. These provide an opportunity to perform non-launch activities, handle unexpected issues, or to catch up on the schedule if it is running long. Under some circumstances, a countdown may be recycled to an earlier time.
Countdown timers not specifically for eggs are also available for general kitchen and timing use. For example, the clockwork Memo Park timer had a countdown of up to sixty minutes and was sold attached to a keyring, its original purpose being to remind motorists when their parking meter was due to expire. [5]
The technique is the namesake of a Pomodoro (Italian for tomato) shaped kitchen timer initially used by Cirillo during his time at university. The "Pomodoro" is described as the fundamental metric of time within the technique and is traditionally defined as being 30 minutes long, consisting of 25 minutes of work and 5 minutes of break time.
A limestone Egyptian water clock, 285–246 BC (Oriental Institute, Chicago). The oldest description of a clepsydra, or water clock, is from the tomb inscription of an early 18th Dynasty (c. 1500 BC) Egyptian court official named Amenemhet, who is identified as its inventor. [27]
Initially using the News 24 theme, the countdown received a custom soundtrack in April 2002. This soundtrack accompanied the seconds and was a remixed variation of the news theme. As the countdown reached five seconds, a beep accompanied each second in a similar fashion to the BBC Pips; this was used as an inspiration to the news theme. [53]
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