本装置利用故障硬盘的音圈电机作为核心元件，用七颗普通LED等作为显示元件，通过控制电机的摇摆频率和速度，发送显示代码在LED上，利用人眼的残留效应显示时间。-This device as a core component of the failed hard drive voice coil motor as seven ordinary LED display elements, and the frequency and speed of the motor-control swing, s