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基于arduino UNO的倒计时交通信号灯系统

来源：花匠小妙招时间：2026-06-01 03:09

基于arduino UNO的倒计时交通信号灯系统

大一新生，刚开始学arduino，看的是程晨老师的《Arduino 电子设计实战指南零基础篇》，有一道课后题是制作一个带倒计时的交通信号灯，利用实验室器材花了一个多小时时间做出来的。使用arduino uno开发板和共阳极数码管，其中红灯倒计时由9到0，绿灯倒计时由5到0，黄灯倒计时由2到0。
实物图
在这里插入图片描述

原理图

代码如下，过于粗糙，欢迎大家斧正。

int pinNum; int redLed = 10; int yellowLed = 11; int greenLed = 12; int smgtwo = 2; int smgthree = 3; int smgfour = 4; int smgfive = 5; int smgsix = 6; int smgseven = 7; int smgeight = 8; int smgnine = 9; void trafficLights(int red,int yellow,int green) { digitalWrite(redLed ,red); digitalWrite(yellowLed ,yellow); digitalWrite(greenLed ,green); } void smg(int two,int three,int four,int five,int six,int seven,int eight,int nine) { digitalWrite(smgtwo,two); digitalWrite(smgthree,three); digitalWrite(smgfour,four); digitalWrite(smgfive,five); digitalWrite(smgsix,six); digitalWrite(smgseven,seven); digitalWrite(smgeight,eight); digitalWrite(smgnine,nine); } void setup() { for(pinNum=2;pinNum<=12;pinNum++) { pinMode(pinNum,OUTPUT); } } void loop() { trafficLights(HIGH,LOW,LOW); smg(HIGH,HIGH,HIGH,HIGH,LOW,HIGH,HIGH,LOW); delay(1000); smg(HIGH,HIGH,HIGH,HIGH,HIGH,HIGH,HIGH,LOW); delay(1000); smg(LOW,LOW,HIGH,HIGH,LOW,LOW,HIGH,LOW); delay(1000); smg(HIGH,HIGH,HIGH,LOW,HIGH,HIGH,HIGH,LOW); delay(1000); smg(HIGH,HIGH,HIGH,LOW,LOW,HIGH,HIGH,LOW); delay(1000); smg(HIGH,HIGH,LOW,HIGH,LOW,LOW,HIGH,LOW); delay(1000); smg(HIGH,LOW,HIGH,HIGH,LOW,HIGH,HIGH,LOW); delay(1000); smg(HIGH,LOW,HIGH,HIGH,HIGH,HIGH,LOW,LOW); delay(1000); smg(LOW,LOW,LOW,HIGH,LOW,LOW,HIGH,LOW); delay(1000); smg(LOW,HIGH,HIGH,HIGH,HIGH,HIGH,HIGH,LOW); delay(1000); trafficLights(LOW,HIGH,LOW); smg(HIGH,HIGH,HIGH,LOW,LOW,HIGH,HIGH,LOW); delay(1000); smg(HIGH,HIGH,LOW,HIGH,LOW,LOW,HIGH,LOW); delay(1000); smg(HIGH,LOW,HIGH,HIGH,LOW,HIGH,HIGH,LOW); delay(1000); smg(HIGH,LOW,HIGH,HIGH,HIGH,HIGH,LOW,LOW); delay(1000); smg(LOW,LOW,LOW,HIGH,LOW,LOW,HIGH,LOW); delay(1000); smg(LOW,HIGH,HIGH,HIGH,HIGH,HIGH,HIGH,LOW); delay(1000); trafficLights(LOW,LOW,HIGH); smg(HIGH,LOW,HIGH,HIGH,HIGH,HIGH,LOW,LOW); delay(1000); smg(LOW,LOW,LOW,HIGH,LOW,LOW,HIGH,LOW); delay(1000); smg(LOW,HIGH,HIGH,HIGH,HIGH,HIGH,HIGH,LOW); delay(1000); }

java

运行

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这里自定义了两个函数，一个trafficLights用来控制红绿灯的亮灭，一个swg用来控制数码管显示的数字。
本人是大一新生某不知名邮电大学电子信息类专业，对硬件方面非常感兴趣，欢迎各位私聊交流。