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378

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.donstudio.cn/?id=254

标签: Arduino

相关文章

Arduino Project 021 -  LED Dot Matrix Display - Scrolling Message

Arduino Project 021 - LED Dot Matrix Display - Scrolling Message

There are many different ways to drive LEDs. Using shift registers is one way and they have their a...

​Arduino Project 046 - Based Security System by Arduino with Lcd Display

​Arduino Project 046 - Based Security System by Arduino with Lcd Display

Arduino Project 046 - Based Security System by Arduino with Lcd Display/*  * Project ...

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 029 - Control Stepper Motor ULN2004A

Arduino Project 029 - Control Stepper Motor ULN2004A

Stepper motors, due to their unique design, can be controlled to a high degree of accuracy without a...

C语言调试运行环境Pelles C的安装

C语言调试运行环境Pelles C的安装

C语言调试运行环境之TurboC一文介绍了在32位Windows系统下安装C语言运行环境之TubroC,但是由于TurobC只能在32位系统下运行,导致现在很多Windows10和Windows 11...

Arduino Project 030B - MX1508 H-Driver Motor

Arduino Project 030B - MX1508 H-Driver Motor

MX1508 H-BridgeDual Motor DriverThe driver can drive up to two motors. The H-Bridge dual motor drive...