A time switch (also called a timer switch, or simply timer) is a timer that operates an electric switch controlled by the timing mechanism. introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952. The mechanism may be mechanical (e.g., clockwork; rarely used nowadays), electromechanical (e.g., a slowly rotating geared motor that mechanically operates switches) or electronic, with semiconductor timing circuitry and switching devices and no moving parts.

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  • دوائر المؤقتات أو دوائر المزمنات (بالإنجليزية: Timer Circuits) هي دوائر كهربية أساسية لعمل الدوائر المنطقية، وللتحكم في الدوائر المنطقية، فإن إشارة الساعة (Clock signal) أو إشارة التزامن تكون موزعة خلال النظام الرقمي، وهذه الإشارة يمكن توليدها عن طريق مولد نبضات، وهذه الإشارة الحادة (sharp) عند الحافة الموجبة (Positive Edge) والحادة عند السالبة (Negative Edge) تستخدم للتحكم في تتابع العمليات في الدوائر الرقمية. ودوائر S-R ،D-Type, J-K كلها تعتبر أمثلة على متعدد الاهتزازات ثنائي الاستقرار (Bistable Multi-vibrator) وسوف نناقش في هذه الدراسة متعدد الاهتزازات غير المستقر (A-Stable Multi-vibrator) والذي ليس له حالة مستقرة وعادة ما يستخدم كمولد للنبضات، والنوع الثالث لمتعدد الاهتزازات هو أحادي الاستقرار (Constable Multi-vibrator) الذي يولد نبضة مستطيلة (Rectangular Pulse) لها عرض ثابت (Fixed Duration). (ar)
  • Eine Zeitschaltuhr oder Schaltuhr ist eine Uhr, die zu festgelegten Zeiten einen elektrischen Kontakt ein- oder ausschaltet. Die Schaltzeiten sind in der Regel individuell einstellbar. Wenn beispielsweise das Brauchwasser täglich von 6 bis 22 Uhr warm sein soll, in der übrigen Zeit aber, um Energie zu sparen, nicht geheizt werden soll, so kann eine Schaltuhr so eingestellt werden, dass die Heizung um 6:00 Uhr eingeschaltet und um 22:00 Uhr wieder ausgeschaltet wird. (de)
  • A time switch (also called a timer switch, or simply timer) is a timer that operates an electric switch controlled by the timing mechanism. introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952. The switch may be connected to an electric circuit operating from mains power, including via a relay or contactor; or low voltage, including battery-operated equipment in vehicles. It may be built into power circuits (as with a central heating or water heater timer), plugged into a wall outlet with equipment plugged into the timer instead of directly into the power point; or built into equipment. A sleep timer is a function on many modern televisions and other electronic devices that shuts off the power after a preset amount of time. The setting is usually made either from the remote control of the device or the device's menu. They are intended to allow viewers to watch as they fall asleep. The mechanism may be mechanical (e.g., clockwork; rarely used nowadays), electromechanical (e.g., a slowly rotating geared motor that mechanically operates switches) or electronic, with semiconductor timing circuitry and switching devices and no moving parts. The timer may switch equipment on, off, or both, at a preset time or times, after a preset interval, or cyclically. A countdown time switch switches power, usually off, after a preset time. A cyclical timer switches equipment both on and off at preset times over a period, then repeats the cycle; the period is usually 24 hours or 7 days. For example, a central heating timer may supply heat for a specified period during the morning and evening every weekday, and all day on weekends. A timer for an unattended slow cooker may switch on automatically at a time and for a period suitable to have food ready at mealtime. Likewise, a coffee maker may turn itself on early in the morning in time for awakening residents to have fresh coffee already brewed for them. Timers may do other processing or have sensors; for example, a timer may switch on lights only during hours of darkness, using a seasonal algorithm or light sensor. Combining the two allows a light to come on at sundown and go off at midnight, for example. An astronomical (or astronomic) timer calculates dawn and dusk times 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 timers wherein all programming is fully automatic. This eliminates the need for a photocell (which may be repeatedly triggered on and off by the light which it operates) or for repeatedly re-setting a regular timer for seasonal changes in the length of day or for daylight-saving time. This allows exterior lighting like a porch light fixture to be controlled by simply replacing its indoor wall switch, or doing the same for a lamp in a dark interior corner (away from a window) by simply plugging-in a self-adjusting lamp timer. Time switches can be used for many purposes, including saving electric energy by consuming it only when required, switching equipment on, off, or both at times required by some process, and home security (for example switching lights in a pattern that gives the impression that premises are attended) to reduce the likelihood of burglary or . Among applications are lighting (interior, exterior, and street lighting), cooking devices such as ovens, washing machines, and heating and cooling of buildings and vehicles. Built-in automatic washing machine controllers are examples of very complex electromechanical and electronic timers cycles, starting and stopping many processes including pumps and valves to fill and empty the drum with water, heating, and rotating at different speeds, with different combinations of settings for different fabrics. (en)
  • 定時開關(英語:time switch、timer switch、timer)、定時插座是一種定時器,由定時機構來進行控制的電子開關,可以在指定時刻(例如下午四點)開啟或是關閉電器,或是在指定的一段時間後(例如二小時後)開啟或是關閉電器。 定時開關可以用來連接一些透過市電供電的設備,可能會透過繼電器或是接觸器進行切換控制,也可能是將設備和特低壓電連接,例如車輛中一些電池供電的設備。定時開關可能內建在功率電路中(例如或是計時器)、插在插座上,定時開關附有插座,需要定時機能的設備改由在定時開關的插座供電,不用插座供電,也有可能直接整合到電器中,例如電視機在設定時間後會自動關閉的功能。 定時開關中的計時機構可能是機械的(例如現在已很少用的發條裝置)、機電的(用馬達驅動,緩慢旋轉的齒輪,再以機械的方式帶動開關)或電子式的(配合半導體計時電路及切換元件,沒有機械式的移動件)。 定時開關可以讓設備開啟、關閉、或開啟一段時間後再關閉,動作時間可能是指定的時刻、指定的時間之後,或是週期性的進行。倒數計時定時開關會在指定時間後切換,一般會將設備關閉。循環式的開關會在不同的時刻開啟設備、關閉設備,而且會週期性的進行。週期多半是24小時或是7天。 例如中央供暖的計時器可以設定在週一至週五的上午及下午啟動,以及在週末整天啟動。可以設定時刻,自動啟動,也可以設定一段時間,讓菜餚在用餐時間之前完成。而咖啡機也可以設定在每天上班時自動煮好咖啡,幫助大家提振精神。 計時器也可以進行其他的處理或是有額外的感測器。例如路燈的計時器可以設定在天暗時點亮,可能是透過季節計算的演算法,或是透過光感測器。若兩者結合,可以讓路燈有在天黑時點燈,到半夜時關閉的效果。 定時開關可以因為許多不同的原因使用,例如節省电能,只在需要的時刻才使用電器,或者是依照一些程序,在特定的時刻打開或關閉設備。例如在上,可能會設定家中的燈光定期的打開及關閉,營造家中有人的感覺,防止有竊賊入內盜竊。 定時開關的應用包括照明(建物內部、外部及路燈)、像烤爐、微波爐之類的廚房設備、洗衣機、及建築或是車輛內的暖通空調。洗衣機中內建的自動洗衣程序中包括了複雜的機電及電子計時週期,啟動或停止許多程序,包括啟動或停止泵浦或是閥,將洗衣槽注水及排水,也包括讓洗衣槽依不同的速度旋轉,以及針對不同的衣物材質的設定。 (zh)
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  • Eine Zeitschaltuhr oder Schaltuhr ist eine Uhr, die zu festgelegten Zeiten einen elektrischen Kontakt ein- oder ausschaltet. Die Schaltzeiten sind in der Regel individuell einstellbar. Wenn beispielsweise das Brauchwasser täglich von 6 bis 22 Uhr warm sein soll, in der übrigen Zeit aber, um Energie zu sparen, nicht geheizt werden soll, so kann eine Schaltuhr so eingestellt werden, dass die Heizung um 6:00 Uhr eingeschaltet und um 22:00 Uhr wieder ausgeschaltet wird. (de)
  • دوائر المؤقتات أو دوائر المزمنات (بالإنجليزية: Timer Circuits) هي دوائر كهربية أساسية لعمل الدوائر المنطقية، وللتحكم في الدوائر المنطقية، فإن إشارة الساعة (Clock signal) أو إشارة التزامن تكون موزعة خلال النظام الرقمي، وهذه الإشارة يمكن توليدها عن طريق مولد نبضات، وهذه الإشارة الحادة (sharp) عند الحافة الموجبة (Positive Edge) والحادة عند السالبة (Negative Edge) تستخدم للتحكم في تتابع العمليات في الدوائر الرقمية. (ar)
  • A time switch (also called a timer switch, or simply timer) is a timer that operates an electric switch controlled by the timing mechanism. introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952. The mechanism may be mechanical (e.g., clockwork; rarely used nowadays), electromechanical (e.g., a slowly rotating geared motor that mechanically operates switches) or electronic, with semiconductor timing circuitry and switching devices and no moving parts. (en)
  • 定時開關(英語:time switch、timer switch、timer)、定時插座是一種定時器,由定時機構來進行控制的電子開關,可以在指定時刻(例如下午四點)開啟或是關閉電器,或是在指定的一段時間後(例如二小時後)開啟或是關閉電器。 定時開關可以用來連接一些透過市電供電的設備,可能會透過繼電器或是接觸器進行切換控制,也可能是將設備和特低壓電連接,例如車輛中一些電池供電的設備。定時開關可能內建在功率電路中(例如或是計時器)、插在插座上,定時開關附有插座,需要定時機能的設備改由在定時開關的插座供電,不用插座供電,也有可能直接整合到電器中,例如電視機在設定時間後會自動關閉的功能。 定時開關中的計時機構可能是機械的(例如現在已很少用的發條裝置)、機電的(用馬達驅動,緩慢旋轉的齒輪,再以機械的方式帶動開關)或電子式的(配合半導體計時電路及切換元件,沒有機械式的移動件)。 定時開關可以讓設備開啟、關閉、或開啟一段時間後再關閉,動作時間可能是指定的時刻、指定的時間之後,或是週期性的進行。倒數計時定時開關會在指定時間後切換,一般會將設備關閉。循環式的開關會在不同的時刻開啟設備、關閉設備,而且會週期性的進行。週期多半是24小時或是7天。 (zh)
rdfs:label
  • دارة مؤقتة (ar)
  • Zeitschaltuhr (de)
  • Time switch (en)
  • 定時開關 (zh)
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