设计一个十字路口的交通灯控制电路，要求东西方向车道和南北方向车道两条交叉道路上的车辆交替运行，每次通行时间都设为45秒。时间可设置修改。-Design of a crossroads of traffic lights control circuit, require lane east-west direction and cross the two-lane north-south direction on the road to the turn of the vehicle runnin

实现单十字路口交通灯的状态转换，可实现倒计时！-Achieve a single traffic signal state transition can be realized countdown!

基于51单片机的十字路口交通灯设计，有keil工程文件，proteus仿真，c语言程序，原理图及pcb图纸。-Based on 51 single-chip crossroads traffic lights design, keil project files, proteus simulation, c language program, schematics and pcb drawings.