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  2. Garage door opener - Wikipedia

    en.wikipedia.org/wiki/Garage_door_opener

    The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.

  3. Limit switch - Wikipedia

    en.wikipedia.org/wiki/Limit_switch

    A limit switch mounted on a moving part of a bridge. In electrical engineering, a limit switch is a switch operated by the motion of a machine part or the presence of an object. A limit switch can be used for controlling machinery as part of a control system, as a safety interlock, or as a counter enumerating objects passing a point. [1]

  4. Hall effect sensor - Wikipedia

    en.wikipedia.org/wiki/Hall_effect_sensor

    A Hall effect sensor (also known as a Hall sensor or Hall probe) is any sensor incorporating one or more Hall elements, each of which produces a voltage proportional to one axial component of the magnetic field vector B using the Hall effect (named for physicist Edwin Hall). Hall sensors are used for proximity sensing, positioning, speed ...

  5. Halo: The Master Chief Collection - Wikipedia

    en.wikipedia.org/wiki/Halo:_The_Master_Chief...

    Genre (s) First-person shooter. Mode (s) Single-player, multiplayer. Halo: The Master Chief Collection is a compilation of first-person shooter video games in the Halo series. The collection was released in November 2014 for the Xbox One, and later ported to Microsoft Windows and the Xbox Series X/S.

  6. Light switch - Wikipedia

    en.wikipedia.org/wiki/Light_switch

    Vintage push-button light switches. The push-button light switch has two buttons: one that closes the contacts and one that opens the contacts. Pushing the raised button opens or closes the contacts and pops out the previously depressed button so the process can be reversed. In the U.S., the buttons were commonly black; the "on" button ...

  7. Push-button - Wikipedia

    en.wikipedia.org/wiki/Push-button

    Push-button. A push-button (also spelled pushbutton) or simply button is a simple switch mechanism to control some aspect of a machine or a process. Buttons are typically made out of hard material, usually plastic or metal. [1] The surface is usually flat or shaped to accommodate the human finger or hand, so as to be easily depressed or pushed.

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