利用单片机实现交通灯，里面包含keil源程序，也包含HEX文件，稍微修改一下输出端口就可以使用。交通的红绿灯时间是可控的，通过按键可以修改时间。-Traffic lights to achieve the use of single-chip, which contains keil source, but also contains HEX files, a little tinkering you can use the output port. Traffic light traffic is controlled through the buttons can be modified.