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  2. Piezo switch - Wikipedia

    en.wikipedia.org/wiki/Piezo_switch

    A piezo switch is an electrical switch based on the piezoelectric effect. The charge generated by the piezoelectric element in the switch is typically used to turn on an integrated semiconductor device such as a field effect transistor (FET), causing the switch assembly's output to be active, or "on". [ 1 ]

  3. Light switch - Wikipedia

    en.wikipedia.org/wiki/Light_switch

    The toggle light switch was invented in 1916 by William J. Newton. [2] As a component of an electrical wiring or home wiring system, the installation of light switches is regulated by some authority concerned with safety and standards. In different countries the standard dimensions of the wall mounting hardware (boxes, plates, etc.) may differ.

  4. Industrial and multiphase power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/Industrial_and_multiphase...

    Lewden plugs and sockets are metal bodied waterproof plugs and sockets made by Lewden. The pin arrangements of the smaller single phase varieties are the same as BS 1363 and BS 546 plugs and sockets. These plugs and sockets will mate with normal plugs and sockets of the same pin arrangement but they are only waterproof when a Lewden plug is ...

  5. Switch - Wikipedia

    en.wikipedia.org/wiki/Switch

    A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that ...

  6. Multiway switching - Wikipedia

    en.wikipedia.org/wiki/Multiway_switching

    In contrast to a simple light switch, which is a single pole, single throw (SPST) switch, multiway switching uses switches with one or more additional contacts and two or more wires are run between the switches. When the load is controlled from only two points, single pole, double throw (SPDT) switches are used.

  7. You can find huge savings in Amazon's secret overstock ... - AOL

    www.aol.com/lifestyle/you-can-find-huge-savings...

    It fills them in seconds when plugged into your car's 12-volt power outlet, and its 9.8-foot cord is long enough to let you reach all four without having to keep adjusting the inflator's position.