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  2. Pencil detonator - Wikipedia

    en.wikipedia.org/wiki/Pencil_detonator

    The briefcase bomb used in the July 20 plot used a captured British pencil detonator inserted into a block of British plastic explosives weighing approximately two pounds. The bomb was set to 30 minutes and detonated as planned, but Hitler survived with minor injuries. Stauffenberg could not prepare the second block, though. He got rid of it ...

  3. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    It has since been set backward 8 times and forward 17 times. The farthest time from midnight was 17 minutes in 1991, and the nearest is 90 seconds, set in January 2023. The Clock was moved to 150 seconds (2 minutes, 30 seconds) in 2017, then forward to 2 minutes to midnight in January 2018, and left unchanged in 2019. [5]

  4. Countdown - Wikipedia

    en.wikipedia.org/wiki/Countdown

    In the context of a rocket launch, the "L minus Time" is the physical time before launch, e.g. "L minus 3 minutes and 40 seconds". "T minus Time" is a system to mark points at which actions necessary for the launch are planned - this time stops and starts as various hold points are entered, and so doesn't show the actual time to launch.

  5. Timer - Wikipedia

    en.wikipedia.org/wiki/Timer

    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.

  6. Time bomb - Wikipedia

    en.wikipedia.org/wiki/Time_bomb

    A time bomb's timing mechanism may be professionally manufactured either separately or as part of the device, or it may be improvised from an ordinary household timer such as a wind-up alarm clock, wrist watch, digital kitchen timer, or notebook computer. The timer can be programmed to count up or count down (usually the latter; as the bomb ...

  7. Trinity (nuclear test) - Wikipedia

    en.wikipedia.org/wiki/Trinity_(nuclear_test)

    A crucial favorable weather report came in at 04:45, [68] and the final twenty-minute countdown began at 05:10, read by Samuel Allison. [103] A rocket launched at 5:25 to signal five minutes before detonation; another rocket fired at 5:29. At 5:29:15, a switch in the control bunker started the detonation timer. [35] By 05:30 the rain had gone. [68]

  8. Sony timer - Wikipedia

    en.wikipedia.org/wiki/Sony_timer

    Sony's chairman of board of directors since 2005 to 2009, Ryōji Chūbachi said, in 2007, that the company was well aware of the existence of this urban legend [1] [2]. The Sony timer (ソニータイマー, Sonī taimā), or Sony kill switch, is an urban legend that electronic devices produced by Sony are equipped with a timer which, upon reaching a deliberately preset deadline, causes the ...

  9. List of Google Easter eggs - Wikipedia

    en.wikipedia.org/wiki/List_of_Google_Easter_eggs

    "stopwatch" and "timer" will provide interactive timing methods; the stopwatch counting up and the timer counting down. Both tools are shown for each search term. Variants such as "set a timer for 10 minutes" can be used. [110] "tic tac toe" or "terni lapilli" will show a playable game of tic-tac-toe. Users can select to play against the ...