零碎记录（自用）。

说话算数，许诺的上海决赛详细情况记录。

蹭课，科普为主。顺便复习一些基础电路知识。
I am not a student of this class but want to listen to the lecture for popularization of science to myself.By the way reviewing some of the basic circuit knowledge.
给这篇文章写英译好辛苦……
It is hard to write English translation for this article.
肖大大图书镇楼！
Uncle Xiao’s book is superior!

单片机课程设计。

自用（单片机等）。