Rotary switches are switches that move in a circle and can stop in a few positions they are used to connect a functional circuit within a device to a source of electricity. Rotary switches are used to control many different circuits within a single switch.
The electrical charge enters the switch and is then directed to whichever circuit is currently selected by the switch. Rotary switches provide a robust mechanical control system
Types of Rotary switches
Professional audio splitters and converters - for moving between different speakers or channels
Voltmeters and similar metering equipment - for selecting different ranges
Car dashboards - for selecting different functions such as the air conditioning or adjustable fans
To adjust the speed of conveyor belts
To control diagnostic equipment