当前位置:首页 > 科学研究 > 电子编程 > 正文内容

Arduino Project 004 - LED Interactive Traffic Lights

RonWang1年前 (2024-06-11)电子编程496

This time you are going to extend the previous project to include a set of pedestrian lights and a pedestrian push button to request to cross the road. The Arduino will react when the button is pressed by changing the state of the lights to make the cars stop and allow the pedestrian to cross safely.

This is the first time you are going to interact with the Arduino and cause it to do something when you change the state of a button that the Arduino is watching. In this project, you will also learn how to create your own functions in code.

From now on, I will no longer list the breadboard and jumper wires in the parts required list. Note that you will always need these basic components.

项目4 Project 4 -Interactive Traffic Lights

04 Interactive Traffic Light Circuit

04 Interactive Traffic Light Schematic

/* Coding Ron Wang
   June 11st 2024
   Autaba support for coding hardwarec
 */
// Project 4 - Interactive LED Traffic Lights

int carRed = 10; // assign the car lights
int carYellow = 9;
int carGreen = 8;
int pedRed = 7; // assign the pedestrian lights
int pedGreen = 6;
int button = 2; // button pin
int crossTime = 5000; // time alloyoud to cross
unsigned long changeTime; // time since button pressed
void setup() {
 pinMode(carRed, OUTPUT);
 pinMode(carYellow, OUTPUT);
 pinMode(carGreen, OUTPUT);
 pinMode(pedRed, OUTPUT);
 pinMode(pedGreen, OUTPUT);
 pinMode(button, INPUT); // button on pin 2
 // turn on the green light
 digitalWrite(carGreen, HIGH);
 digitalWrite(pedRed, HIGH);
}
void loop() {
 int state = digitalRead(button);
 /* check if button is pressed and it is over 5 seconds since last button press */
 if (state == HIGH && (millis() - changeTime) > 5000) {
 // Call the function to change the lights
 changeLights();
 }
}
void changeLights() {
 digitalWrite(carGreen, LOW); // green off
 digitalWrite(carYellow, HIGH); // yellow on
 delay(2000); // wait 2 seconds
 digitalWrite(carYellow, LOW); // yellow off
 digitalWrite(carRed, HIGH); // red on
 delay(1000); // wait 1 second till its safe
 digitalWrite(pedRed, LOW); // ped red off
 digitalWrite(pedGreen, HIGH); // ped green on
 delay(crossTime); // wait for preset time period
 // flash the ped green
 for (int x=0; x<10; x++) {
 digitalWrite(pedGreen, HIGH);
 delay(250);
 digitalWrite(pedGreen, LOW);
 delay(250);
 }
 // turn ped red on
 digitalWrite(pedRed, HIGH);
 delay(500);
 digitalWrite(carYellow, HIGH); // yellow on
 digitalWrite(carRed, LOW); // red off
 delay(1000);
 digitalWrite(carGreen, HIGH);
 digitalWrite(carYellow, LOW); // yellow off
 // record the time since last change of lights
 changeTime = millis();
 // then return to the main program loop
}

版权声明:本文为原创文章,版权归donstudio所有,欢迎分享本文,转载请保留出处!

本文链接:http://www.parentscn.com/?id=254

标签: Arduino

相关文章

Arduino Project 030A - Dual Motor Driver L298N

Arduino Project 030A - Dual Motor Driver L298N

L298N Dual Motor Driver Project Description  The L298N Motor Driver is a control...

Arduino Project 023 - Liquid Crystal Displays - Hello World

Arduino Project 023 - Liquid Crystal Displays - Hello World

Before wiring the LCD screen to your Arduino board we suggest to solder a pin header strip to the 14...

 ​Arduino Project 049 - IR Remote Control

​Arduino Project 049 - IR Remote Control

Project 49 IR Remote Control/* Project 49 IR Remote Control  * C...

C语言调试运行环境TurboC的安装

C语言调试运行环境TurboC的安装

上大学时学习《C语言程序设计》(第二版)作者谭浩强,大部分编程时间是在学校机房度过,每次点开桌面的TurboC图标,就开始在里面敲代码,然后保存程序Abc.C,下一步进行编译,如果编译成功的话,就可以...

Arduino Programming Basic - Serial Monitor

Arduino Programming Basic - Serial Monitor

Arduino 程序基础,介绍Arduino程序的基本组成,第一部分编写数个例程,讲解关于变量及变量名称,串口监视器,if循环,for循环,while循环等。第二部分介绍了函数,全局变量,局部变量和静...

Arduino Project 005 - LED Chase Lights

Arduino Project 005 - LED Chase Lights

You’re going to use a string of LEDs (10 in total) to make an LED chase effect, similar to that used...