同时利用霍尔传感器将电机速度转换成脉冲频率反馈到单片机中，实现转速闭环控制，达到转速检测目的。
At the same time using Holzer sensors will be converted into pulse frequency motor speed feedback to the MCU, realize the speed closed-loop control, to achieve speed detection.
该晶片是一个压电谐振器，以精准而极高的频率对电压作出反馈，进行放大和收缩。
The wafer is a piezoelectric resonator, expanding and contracting in response to electrical voltages at a precise, extremely high frequency.
调节到不同的频率或是交替使用，产生反馈的程度也不同，还有不同的触摸质感可供选择。
Tuned to different frequencies or alternated, the result would be resistance of varying degrees, including varying textural feeling.
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