PL-51单片机学习板实例程序\实例程序\C语言\025-蜂鸣器演奏消防车的报警声音\喇叭演奏消防车的报警声音-PL-51 microcontroller board instance learning program \ instance procedure \ C language \ 025- fire alarm buzzer sounds playing \ fire alarm sound speaker play

单片机控制交通灯原理图和程序代码，可实现在数码管上轮流显示信号交叉口东西南北四个方向红绿灯-MCU control traffic lights schematics and program code can be realized in the digital tube display signal turns East and West four directions intersection traffic lights