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  2. Automatic lamp changer - Wikipedia

    en.wikipedia.org/wiki/Automatic_lamp_changer

    Lampchanger in the Maughold Head Lighthouse, Isle of Man. This is a model NALC-89, produced by Nav-Aids Systems, LTD, in Kent, England. An automatic lamp changer (or lampchanger) is a device used to ensure that a navigational light such as a marine lighthouse or aero beacon stays lit even if a bulb burns out. Numerous types exist.

  3. Lighting control system - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_system

    For dimmable fluorescent lamps (where it operates instead at 1-10 V, where 1 V is minimum and 0 V is off) the system is being replaced by DSI, which itself is in the process of being replaced by DALI. Examples for digital lighting control systems are: DALI based system. DSI based system; KNX based systems; Those are all wired lighting control ...

  4. Voltage controller - Wikipedia

    en.wikipedia.org/wiki/Voltage_controller

    A Voltage controller thyristor based dimmer rack An electrical schematic for a typical SCR-based light dimmer. A voltage controller, also called an AC voltage controller or AC regulator is an electronic module based on either thyristors, triodes for alternating current, silicon-controlled rectifiers or insulated-gate bipolar transistors, which converts a fixed voltage, fixed frequency ...

  5. Dimmer - Wikipedia

    en.wikipedia.org/wiki/Dimmer

    European dimmers must comply with relevant EMC legislation requirements; this involves suppressing the emissions described above to limits described in EN55104. In the electrical schematic shown, a typical light dimmer based on a silicon-controlled rectifier (SCR) dims the light through phase-angle control. This unit is wired in series with the ...

  6. NYT ‘Connections’ Hints and Answers Today, Monday, January 13

    www.aol.com/nyt-connections-hints-answers-today...

    3. Words/phrases you might hear while taking a specific class. 4. The words in this category precede a common four-letter noun (hint: the noun typically refers to a small and elongated ...

  7. 'It was an easy decision': Groups rescue dozens of animals ...

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    Frey added the shelter wanted to find a way to support the affected animals even though they themselves were at 125% capacity for dogs.

  8. Heat's Jimmy Butler reportedly prefers trade out of Miami ...

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    The No. 1 high-protein upgrade for your salad, according to a dietitian. Lighter Side. Lighter Side. Town & Country. A Complete Guide to Prince Harry and Meghan Markle's Netflix Shows.

  9. Sun valve - Wikipedia

    en.wikipedia.org/wiki/Sun_valve

    The valve was the key component of the Dalén light used in lighthouses from the 1900s through the 1960s, by which time electric lighting was dominant. Prominent engineers, such as Thomas Edison, doubted that the device could work. The German patent office required a demonstration before approving the patent application. [1]