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What is rotary switch?

A rotary switch is an electrical switch that is operated by rotating a knob or lever to different positions. The switch is designed to make contact with one or more terminals, depending on the position of the knob, which allows it to control the flow of electricity to different parts of a circuit.


Rotary switches are typically used in applications where multiple settings or functions need to be selected, such as in audio equipment, electronic instruments, and industrial control systems. They can be used to select different input or output signals, to switch between different modes or settings, or to adjust the volume or tone of an audio signal.


Rotary switches can come in a variety of configurations, including single-pole single-throw (SPST), single-pole double-throw (SPDT), double-pole double-throw (DPDT), and more. They can also have a varying number of positions, with some switches having just two positions (on/off), while others can have multiple positions, with up to 12 or more contacts.


Some rotary switches have a detent mechanism that allows the switch to click into each position, providing tactile feedback to the user. This can be useful in applications where it is important to be able to feel the position of the switch, such as in low-light or high-noise environments.


Overall, rotary switches are popular because they are reliable, durable, and easy to use, and can provide a simple and effective method for controlling and selecting different functions in electronic and electrical systems.


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