毕业设计做的用c51单片机做的信号灯，目前以实现的功能有Led灯前三个红黄绿灯分别代表，红灯，绿灯，黄灯交通信号灯。

四个相位周期都为60s，红灯30s，绿灯27s，黄灯3秒。后期陆续更新。欢迎大家下载学习。-Graduation do c51 microcontroller to do with lights, in order to achieve the functions of the current front Led lights representing the three red, yellow, green, red, green, yellow traffic lights. Four-phase cycle of 60s, red 30s, green 27s, amber three seconds. Late after another update. Welcome to download the study.