Pushwheel switches are rotary switches that operate using a rolling wheel.

Rotary switches move in a circle and can stop in several positions.

Binary adders are digital devices that are capable of adding binary numbers.

Digital decoders and digital demultiplexers move data between inputs and outputs.

Rotary coded dual in-line package (DIP) switches are activated by a rotating shaft and have several stop positions.

Keylock switches are activated by a key that is turned in a circle and can stop in a range of positions.

Digital counters are integrated circuits used for counting events in computers and other digital systems.