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  2. Garage door opener - Wikipedia

    en.wikipedia.org/wiki/Garage_door_opener

    Limit switches on the power unit control the distance the garage door opens and closes once the motor receives a signal from the remote control or wall push button to operate the door. [3] The entire assembly hangs above the garage door. The power unit hangs from the ceiling and is located towards the rear of the garage.

  3. Silicone rubber keypad - Wikipedia

    en.wikipedia.org/wiki/Silicone_rubber_keypad

    On depression of the switch, the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch, the webbing returns to its neutral position with positive feedback. To make an electronic switch, a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when ...

  4. List of keyboard switches - Wikipedia

    en.wikipedia.org/wiki/List_of_keyboard_switches

    Switch name Stem design Switch type Click type Initial force Actuation force Spring force Actuation point Total travel Mounting type Factory lube SMD LED compatibility Key stroke lifespan Drop x Invyr Kailh Holy Panda [22] MX Type stem Tactile N/A 67 g 67 g 67 g 1.2 mm 4.0 mm Plate mounting No Yes 80 million Drop Kailh Halo True [23] MX Type stem

  5. Keyboard technology - Wikipedia

    en.wikipedia.org/wiki/Keyboard_technology

    Hot-swappable keyboards are keyboards in which switches can be pulled out and replaced without requiring the typical solder connection. [7] [8] Instead of the switch pins being directly soldered to the keyboard's PCB, hot-swap sockets are instead soldered on. Hot-swap sockets can allow users to change different switches out of the keyboard ...

  6. Walkie-talkie - Wikipedia

    en.wikipedia.org/wiki/Walkie-talkie

    A walkie-talkie, more formally known as a handheld transceiver, HT, or handheld radio, is a hand-held, portable, two-way radio transceiver.Its development during the Second World War has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski and engineering teams at Motorola.

  7. Remote base station - Wikipedia

    en.wikipedia.org/wiki/Remote_base_station

    A remote base station [1] is a common name for an amateur radio auxiliary station that is controlled and operated from a remote location. Most remote base stations have similar features to any other Amateur radio station but can be controlled over a direct wired connection or the internet, or by radio. In many ways, remote base stations ...

  8. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    In 2013 and 2014, Samsung experimented with the hybrid combination of compact camera and smartphone, releasing the Galaxy S4 Zoom and K Zoom, each equipped with integrated 10× optical zoom lens and manual parameter settings (including manual exposure and focus) years before these were widely adapted among smartphones. The S4 Zoom additionally ...

  9. Bluetooth - Wikipedia

    en.wikipedia.org/wiki/Bluetooth

    Wireless control and communication between a mobile phone and a handsfree headset. This was one of the earliest applications to become popular. [38] Wireless control of audio and communication functions between a mobile phone and a Bluetooth compatible car stereo system (and sometimes between the SIM card and the car phone [39] [40]).