文档介绍：限速信号灯控制院系: 班级: 学号: 姓名: 时间: 201 1年 12月 11日限速信号灯控制原理根基长期的统计,发现某一道段路高峰期通过车辆数目规律:大约 9/6 数量不等。现就这一现象再次路上设置限速灯。 9秒时间车速不限 6秒车辆需减速慢行。一、设置原理七段数码管显示时间,黄灯提示限速。 1、 LED 显示器的结构与原理 LED 显示器是由发光二极管按一定结构组合起来显示字段的显示器件,也称为数码管。 2、限速灯原理二、控制程序 int a=3; int b= 4; int c=5; int d= 6; int e=7; int f=8; int g= 9; inth= 13; void setup() { (9600); pinMode(2,OUTPUT); pinMode(3,OUTPUT); pinMode(4,OUTPUT); pinMode(5,OUTPUT); pinMode(6,OUTPUT); pinMode(7,OUTPUT); pinMode(8,OUTPUT); pinMode(9,OUTPUT); } void loop() { digitalWrite(a,HIGH);//9 digitalWrite(b,HIGH); digitalWrite(c,HIGH); digitalWrite(d,1); digitalWrite(e,0); digitalWrite(f,HIGH); digitalWrite(g,1); delay(1000); digitalWrite(a,HIGH);//8 digitalWrite(b,HIGH); digitalWrite(c,HIGH); digitalWrite(d,HIGH); digitalWrite(e,HIGH); digitalWrite(f,HIGH); digitalWrite(g,1); delay(1000); digitalWrite(a,HIGH);//7 digitalWrite(b,HIGH); digitalWrite(c,HIGH); digitalWrite(d,0); digitalWrite(e,0); digitalWrite(f,0); digitalWrite(g,LOW); delay(1000); digitalWrite(a,HIGH);//6 digitalWrite(b,0); digitalWrite(c,HIGH); digitalWrite(d,1); digitalWrite(e,1); digitalWrite(f,1); digitalWrite(g,1); delay(1000); digitalWrite(a,HIGH);//5 digitalWrite(b,0); digitalWrite(c,HIGH); digitalWrite(d,HIGH); digitalWrite(e,0); digitalWrite(f,HIGH); digitalWrite(g,1); delay(1000); digitalWrite(a,0);//4 digitalWrite(b,1); digitalWrite(c,HIGH); digitalWrite(d,0); digitalWrite(e