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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. Half-moon switch - Wikipedia

   en.wikipedia.org/wiki/Half-moon_switch

   A half-moon switch is a type of electronic toggle switch. ... (labelled tremolo). There is often an off position in between the two settings, depending on the switch. [1]

4. 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.

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. 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 ...

7. AS-Interface - Wikipedia

   en.wikipedia.org/wiki/AS-interface

   Actuator Sensor Interface (AS-Interface or ASi) is an industrial networking solution (Physical Layer, Data access Method and Protocol) used in PLC, DCS and PC-based automation systems. It is designed for connecting simple field I/O devices (e.g. binary ON/OFF devices such as actuators, sensors, rotary encoders, analog inputs and outputs, push ...

8. 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.

9. 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 ...