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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. Chamberlain Group - Wikipedia

    en.wikipedia.org/wiki/Chamberlain_Group

    Clicker — a line of universal garage door remotes. Chamberlain, LiftMaster, and Craftsman have interchangeable parts, primarily the gear and circuit boards. The greatest difference between the brands is that Chamberlain and Craftsman operate on a square shaped split-rail system, while LiftMaster consists of one single solid piece of inverted ...

  4. Remote keyless system - Wikipedia

    en.wikipedia.org/wiki/Remote_keyless_system

    Prior to Remote Keyless Entry, a number of systems were introduced featuring Keyless Entry (i.e., not remote), including Ford's 1980 system introduced on the Ford Thunderbird, Mercury Cougar, Lincoln Continental Mark VI, and Lincoln Town Car, which Ford called Keyless Entry System (later marketed SecuriCode). The system used a five-button ...

  5. Remote control - Wikipedia

    en.wikipedia.org/wiki/Remote_control

    In electronics, a remote control (also known as a remote or clicker [1]) is an electronic device used to operate another device from a distance, usually wirelessly. In consumer electronics , a remote control can be used to operate devices such as a television set , DVD player or other digital home media appliance.

  6. Rolling code - Wikipedia

    en.wikipedia.org/wiki/Rolling_code

    Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow. An attacker with an appropriate receiver could discover the code word and use it to gain access sometime later. More sophisticated remote control systems use a rolling code (or hopping code) that changes for every use.

  7. A23 battery - Wikipedia

    en.wikipedia.org/wiki/A23_battery

    An A23 battery is cylindrical and approximately two-thirds the length of an AAA battery, measuring 28.2 mm (1.11 in) long and 10.0 mm (0.39 in) in diameter, with a typical weight of 8 grams. An A23 battery is an 8- cell device with a nominal voltage of 12 V.

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