初学AVR，手头没有什么具体实践的课题，拆了几个小马达，玩玩中，也学到不少东西。希望可以给初学者一点帮助。 -Beginner AVR, do not practice any specific task, the demolition of several small motors, play in, but also learned a lot. Give a little hope that we can assist beginners.