The utility model relates to a middle keying structure based on a rotating potentiometer.

本实用新型涉及一种基于旋转电位器的中间按键架构。

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Set the frequency of simple, easy to operate, only an external potentiometer gently rotating the knob, you can set the frequency.

频率设置简单，操作方便，只需轻轻转动外接电位器的旋钮，就可以进行频率设置。

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