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  2. Multiplexer - Wikipedia

    en.wikipedia.org/wiki/Multiplexer

    Schematic of a 1-to-2 demultiplexer. Like a multiplexer, it can be equated to a controlled switch. In electronics, a multiplexer (or mux; spelled sometimes as multiplexor), also known as a data selector, is a device that selects between several analog or digital input signals and forwards the selected input to a single output line. [1]

  3. Rotary switch - Wikipedia

    en.wikipedia.org/wiki/Rotary_switch

    A rotary switch is a switch operated by rotation. These are often chosen when more than 2 positions are needed, such as a three-speed fan or a CB radio with multiple frequencies of reception or "channels". A rotary switch consists of a spindle or "rotor" that has a contact arm or "spoke" which projects from its surface like a cam.

  4. Multiway switching - Wikipedia

    en.wikipedia.org/wiki/Multiway_switching

    The switches may be arranged so that they are in the same orientation for off, and contrasting orientations for on. [1] A "4-way" (intermediate) switch is a purpose built double pole, double throw (DPDT) switch, internally wired in manufacture to reverse the connections between the input and output and having only four external terminals. This ...

  5. Switch - Wikipedia

    en.wikipedia.org/wiki/Switch

    Switches can be designed to respond to any type of mechanical stimulus: for example, vibration (the trembler switch), tilt, air pressure, fluid level (a float switch), the turning of a key , linear or rotary movement (a limit switch or microswitch), or presence of a magnetic field (the reed switch). Many switches are operated automatically by ...

  6. Stepping switch - Wikipedia

    en.wikipedia.org/wiki/Stepping_switch

    Slightly more complicated was the two axis stepping switch, (also called Strowger switch or two motion selector in Britain). Typically, a single compact group of wipers could connect to one of 100 (or 200) different fixed contacts, in ten levels. When the switch was idle, the wipers were disengaged from the fixed contacts.

  7. Electronic switch - Wikipedia

    en.wikipedia.org/wiki/Electronic_switch

    Without using moving parts, they are called solid state switches, which distinguishes them from mechanical switches. [ 1 ] Electronic switches are considered binary devices because they dramatically change the conductivity of a path in electrical circuit between two extremes when switching between their two states of on and off .

  8. Panel switch - Wikipedia

    en.wikipedia.org/wiki/Panel_switch

    Panel switch district selector frame at the Connections Museum in Seattle. The Panel Machine Switching System is a type of automatic telephone exchange for urban service that was used in the Bell System in the United States for seven decades.

  9. Director telephone system - Wikipedia

    en.wikipedia.org/wiki/Director_telephone_system

    The A-digit selector, BC switch and particularly the send switch uniselector of the director were worked much harder than selectors in the switching train which were held for the duration of the call, [7] and the noise in the vicinity of director racks in the busy hour could be unbearable. An experimental “all-relay” director (apart from a ...