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  2. Garage door opener - Wikipedia

    en.wikipedia.org/wiki/Garage_door_opener

    A residential garage door opener. The motor is in the box on the upper-right. A garage door opener is a motorized device that opens and closes a garage door controlled by switches on the garage wall. Most also include a handheld radio remote control carried by the owner, which can be used to open and close the door from a short distance.

  3. DIP switch - Wikipedia

    en.wikipedia.org/wiki/DIP_switch

    DIP switch. A slide-style DIP switch soldered into a printed circuit board (PCB) A DIP switch is a manual electric switch that is packaged with others in a group in a standard dual in-line package (DIP). The term may refer to each individual switch, or to the unit as a whole. This type of switch is designed to be used on a printed circuit board ...

  4. Electric eye - Wikipedia

    en.wikipedia.org/wiki/Electric_eye

    Electric eye for a garage door opener. An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam.

  5. Rolling code - Wikipedia

    en.wikipedia.org/wiki/Rolling_code

    Rolling code. A rolling code (or sometimes called a hopping code) is used in keyless entry systems to prevent a simple form of replay attack, where an eavesdropper records the transmission and replays it at a later time to cause the receiver to 'unlock'. Such systems are typical in garage door openers and keyless car entry systems.

  6. 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]

  7. Frequency-shift keying - Wikipedia

    en.wikipedia.org/wiki/Frequency-shift_keying

    Minimum frequency-shift keying or minimum-shift keying (MSK) is a particular spectrally efficient form of coherent FSK. In MSK, the difference between the higher and lower frequency is identical to half the bit rate. Consequently, the waveforms that represent a 0 and a 1 bit differ by exactly half a carrier period.

  8. Garage door - Wikipedia

    en.wikipedia.org/wiki/Garage_door

    A garage door is a large door to allow egress for a garage that opens either manually or by an electric motor (a garage door opener). Garage doors are frequently large enough to accommodate automobiles and other vehicles. The operating mechanism is usually spring-loaded or counterbalanced to offset the door's weight and reduce the human or ...

  9. Category:Garage door openers - Wikipedia

    en.wikipedia.org/wiki/Category:Garage_door_openers

    Pages in category "Garage door openers". The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes .