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The hardware and software used in this experiment are listed below:  \begin{enumerate}  \item[HARDWARE] \item[HARDWARE]\\  Computer with a USB port and compatible with Windows 7;  Development board Wildcat 2000;  Ball-tunnel apparatus provided by the laboratory.  \\  \item[SOFTWARE] \item[SOFTWARE]\\  Dynamic C 9.62;  Codes provided by the laboratory instructions and the course website.  \\