交通灯设计，51单片机汇编编程，有LED灯红绿黄闪烁并有数码管显示倒计时，系统带有可调功能，当东西道上出现紧急情况，可立即调节开关，使东西道调到红灯，停止东西道通行。-Traffic light design, 51 assembly programming, there are red, green and yellow flashing LED lights and a digital display counts down system with adjustable features,