基于51单片机实现的交通灯，可作为毕业设计作品，课程设计作品！本人已做成成品，效果不错的哦！内有原理图，源程序，仿真图。需要的可以下载哦！-The traffic lights 51 based MCU, as part of the graduation design, curriculum design works! I have already finished, effect is good oh! There are schematics, source code, simulation diagram. Need to download oh!