能实现多功能。既可做倒计时秒表,又可进行定时，还可以通过扩展完成其他功能，而且功能的相互转换也十分简单-To achieve multi-functional. Can do the countdown stopwatch, but also to timing, but also by extending the completion of other functions, and inter-conversion functions is also very simple and

交通灯源代码 帮同学做的毕业设计，可以实现红绿灯，数码管倒计时显示-Traffic light source designed to help students do graduate, you can achieve the traffic lights, digital countdown display tube