Incremental rotary encoder(1)！

    An incremental rotary encoder provides cyclical outputs(only) when the encoder is rotated. They can be either mechanical or optical.The mechanical type requires debouncing and is typically used as digital potentiometers on equipment including consumer devices.Most modern home and car stereos use mechanical rotary encoders for volume control.Due to the fact the mechanical switches require debouncing, the mechanical type are limited in the rotational speeds they can handle.The incremental rotary encoder is the most widely used of all rotary encoders duo to its low cost and ability to prive signals that can be easily interpreted to provide motion related information such as velocity.

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