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  2. Time switch - Wikipedia

    en.wikipedia.org/wiki/Time_switch

    An astronomical (or astronomic) timer calculates dawn and dusk times (tracking the sun position) for each day of the year based on the latitude and longitude (or just north/central/south and time zone on more cheaply made ones), and the day of the year (month and date), programmed by the user upon installation in addition to the usual time of day, except in the case of GPS enabled astronomic ...

  3. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    A condensing boiler Hot water central heating unit, using wood as fuel. A central heating system provides warmth to a number of spaces within a building from one main source of heat. A central heating system has a furnace that converts fuel or electricity to heat.

  4. Video recorder scheduling code - Wikipedia

    en.wikipedia.org/wiki/Video_recorder_scheduling_code

    The central concept of the system is a unique number, a PlusCode, assigned to each programme, and published in television listings in newspapers and magazines (such as TV Guide). To record a programme, the code number is taken from the newspaper and input into the video recorder, which would then record on the correct channel at the correct time.

  5. Watchdog timer - Wikipedia

    en.wikipedia.org/wiki/Watchdog_timer

    A watchdog timer (WDT, or simply a watchdog), sometimes called a computer operating properly timer (COP timer), [1] is an electronic or software timer that is used to detect and recover from computer malfunctions. Watchdog timers are widely used in computers to facilitate automatic correction of temporary hardware faults, and to prevent errant ...

  6. Home Improvement (TV series) - Wikipedia

    en.wikipedia.org/wiki/Home_Improvement_(TV_series)

    Home Improvement is an American sitcom television series starring Tim Allen originally aired on ABC from September 17, 1991, to May 25, 1999, with a total of 204 half-hour episodes spanning eight seasons.

  7. Elevator - Wikipedia

    en.wikipedia.org/wiki/Elevator

    Past problems with hydraulic elevators include underground electrolytic destruction of the cylinder and bulkhead, pipe failures, and control failures. Single bulkhead cylinders, typically built prior to a 1972 ASME A17.1 Elevator Safety Code change requiring a second dished bulkhead, were subject to possible catastrophic failure .