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  2. Switch - Wikipedia

    en.wikipedia.org/wiki/Switch

    Some suppliers use DPCO for switches with a stable center position and DPDT for those without. A DPDT/DPCO switch with a center position can be "off" in the center, not connected to either L1 or L2, or "on", connected to both L1 and L2 at the same time. The positions of such switches are commonly referenced as "on-off-on" and "on-on-on ...

  3. Bistability - Wikipedia

    en.wikipedia.org/wiki/Bistability

    These switches are often designed to snap firmly into the "on" or "off" position once the toggle handle has been moved a certain distance past the center-point. A ratchet-and-pawl is an elaboration—a multi-stable "over center" system used to create irreversible motion.

  4. Toggle switch (widget) - Wikipedia

    en.wikipedia.org/wiki/Toggle_switch_(widget)

    A toggle switch is a graphical control element that allows the user to make a choice between two mutually exclusive states (such as on/off). Originally toggle switches were used primary in touchscreen-based user interfaces, but they have later become commonplace in desktop and web applications. Toggle switches have a similar function as ...

  5. Position sensor - Wikipedia

    en.wikipedia.org/wiki/Position_sensor

    A position sensor is a sensor that detects an object's position. A position sensor may indicate the absolute position of the object (its location) or its relative position (displacement) in terms of linear travel, rotational angle or three-dimensional space. Common types of position sensors include the following: Capacitive displacement sensor

  6. Mercury switch - Wikipedia

    en.wikipedia.org/wiki/Mercury_switch

    A Single-Pole, Single-Throw (SPST) mercury switch on millimetre graph paper, device length approximately 1.5 cm Another mercury switch design. A mercury switch is an electrical switch that opens and closes a circuit when a small amount of the liquid metal mercury connects metal electrodes to close the circuit.

  7. Power symbol - Wikipedia

    en.wikipedia.org/wiki/Power_symbol

    IEC 60417-5007, [6] the power-on symbol (line), appearing on a button or one end of a toggle switch indicates that the control places the equipment into a fully powered state. (1 or | means on.) IEC 60417-5008, [7] the power-off symbol (circle) on a button or toggle, indicates that using the control will disconnect power to the device. (0 or ...

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