Published April 19, 2022

Arduino Traffic Light/ Signal with LCD Counter Display

In this Project you will able to make Arduino Based Traffic Light or Traffic Signal with LCD in which Time left for Signal will be Shown.

BeginnerFull instructions provided12 minutes5,604

Arduino Traffic Light/ Signal with LCD Counter Display

Things used in this project

Hardware components

Arduino UNO

Alphanumeric LCD, 16 x 2

5 mm LED: Red

5 mm LED: Yellow

3 mm LED: Green

Resistor 1k ohm

Breadboard (generic)

Jumper wires (generic)

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

LiquidCrystal.h Library

Story

Connect me on

Below is a video that goes through all the steps to assembling and running the traffic lights using the Arduino Look the Demonstration video HERE

Youtube

Hackster

Arduino

Introduction

In this project I will Demonstrate you how to make a very simple and very cool traffic light Using Arduino with LCD which shows counter for Traffic Light.

This project will involve using a little a bit of code and a very simple circuit that’s great for beginners.

The video further down this page will go through all the steps to completing this cool traffic light project.

This simple little project uses an Arduino and some LEDs to replicate a traffic light. It uses code as an internal timer and continues to run until you cut the Arduino's power supply.

This is a miniature copy of a original Traffic light. I meant to say that like Traffic light have LCD which shows Time Left and LED same I am trying to demonstrating here.

Working on Basics

The LED have been powered by Arduino UNO (Board). It contains a code which uploaded to the board. And once it simulated LED Start's blinking like a traffic light. In this 15 Second will for Red Light 6 Second for Yellow Light (In my Project Blue) and 20 Second for Green Light.

Once code have been uploaded you will be able to see that start Displaying text like stop on red start on Yellow and go on green.

Including this you will also able to see time left for the next signal.

Usage

There is multiple usage of the project:-

If you are beginner so it is a intro to arduino

You can Make a real but small Traffic Light using it

You can also add more LED and Can change as per your use

You will learn how LCD used

Prototype Image

1 / 4

Hookup

Follow the Steps:-

Connection of LED

Hook the GND pin (Negative Pin) of all led to Pin GND of Arduino.

Connect Red LED VCC Pin (Positive Pin) to Pin 9 of Arduino.

Connect Yellow LED VCC Pin (Positive Pin) to Pin 8 of Arduino.

Connect Green LED VCC Pin (Positive Pin) to Pin 7 of Arduino.

Connection of LCD

Connect the First pin from the left of LCD (GND pin) with GNDpin of Arduino.

Connect the Second pin from the left of LCD (VCC pin) with VCCpin of Arduino.

Connect the Third pin from the left of LCD (V0 pin) with GNDpin of Arduino.

Connect the Fourth pin from the left of LCD (RS pin) with 11pin of Arduino.

Connect the Fifth pin from the left of LCD (R/W pin) with GNDpin of Arduino.

Connect the Sixth pin from the left of LCD (E pin) with 10pin of Arduino.

Connect the Eleventh pin from the left of LCD (D4 pin) with 5pin of Arduino.

Connect the Twelveth pin from the left of LCD (D5 pin) with 4pin of Arduino.

Connect the Thirteen pin from the left of LCD (D6 pin) with 3pin of Arduino.

Connect the Fourteenth pin from the left of LCD (D7 pin) with 2pin of Arduino.

Connect the Fifteenth pin from the left of LCD (5V pin) with 1 K Resistor with 2pin of Arduino.

Connect the Last pin from the left of LCD (GND pin) with GND pin of Arduino.

Uploading and Testing

Remember to install LiquidCrystal.h library from HERE

Copy or download the code attached with the project.

Hit upload and look into LCD.

Hit upload and look into LED's too.

You will able to see the Red LED will on for 15 second and then yellow led (mine Blue) will blink for 6 sec and then green led will constant on for 20 sec and then it again repeat the process

You will also able to see that on LCD time left will be shown how much time left for next signal and the action to be done on the signal like Stop, Start, Go

Watch the Demonstration Video

CLICK HERE

Systematic

Connection of LED

Hook the GND pin (Negative Pin) of all led to Pin GND of Arduino.
Connect Red LED VCC Pin (Positive Pin) to Pin 9 of Arduino.
Connect Yellow LED VCC Pin (Positive Pin) to Pin 8 of Arduino.
Connect Green LED VCC Pin (Positive Pin) to Pin 7 of Arduino.
Connection of LCD

Connect the First pin from the left of LCD (GND pin) with GNDpin of Arduino.
Connect the Second pin from the left of LCD (VCC pin) with VCCpin of Arduino.
Connect the Third pin from the left of LCD (V0 pin) with GNDpin of Arduino.
Connect the Fourth pin from the left of LCD (RS pin) with 11pin of Arduino.
Connect the Fifth pin from the left of LCD (R/W pin) with GNDpin of Arduino.
Connect the Sixth pin from the left of LCD (E pin) with 10pin of Arduino.
Connect the Eleventh pin from the left of LCD (D4 pin) with 5pin of Arduino.
Connect the Twelveth pin from the left of LCD (D5 pin) with 4pin of Arduino.
Connect the Thirteen pin from the left of LCD (D6 pin) with 3pin of Arduino.
Connect the Fourteenth pin from the left of LCD (D7 pin) with 2pin of Arduino.
Connect the Fifteenth pin from the left of LCD (5V pin) with 1 K Resistor with 2pin of Arduino.
Connect the Last pin from the left of LCD (GND pin) with GND pin of Arduino.

Schematics

Circuit Diagram

Code

Code

#include <LiquidCrystal.h>
int red = 9;
int yellow = 8;
int green = 7;
//Designer Krishna Agarwal (DIY Inventor)
//Devloper Krishna Agarwal (DIY Inventor)
//Code by Krishna Agarwal (DIY Inventor)
LiquidCrystal lcd(11, 10, 5, 4, 3, 2); 

void setup(){
  
  pinMode(red, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);
    lcd.begin(16, 2);
    lcd.setCursor(0, 0);
    lcd.print("   Turning On   ");
    lcd.setCursor(0, 1);
    lcd.print(" Traffic  Light ");
    delay(2000);
  lcd.clear();
lcd.setCursor(0, 0);
    lcd.print("     SYSTEM");
    lcd.setCursor(0, 1);
    lcd.print("       ON");
    delay(1500);
  lcd.clear();

    
}
void loop(){
 lcd.begin(16, 2);
  lcd.setCursor(0, 0);
    lcd.print("Stop Red Light ");
    lcd.setCursor(0, 1);
    lcd.print("15 Second");
  digitalWrite(red, HIGH);
    delay(1000);
 
lcd.setCursor(0, 1);
    lcd.print("14 Second");
  digitalWrite(red, HIGH);
    delay(1000); 
  lcd.setCursor(0, 1);
    lcd.print("13 Second");
  digitalWrite(red, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("12 Second");
  digitalWrite(red, HIGH);
    delay(1000);
    lcd.setCursor(0, 1);
    lcd.print("11 Sec");
  digitalWrite(red, HIGH);
    delay(1000);
     lcd.setCursor(0, 1);
    lcd.print("10 Sec");
  digitalWrite(red, HIGH);
    delay(1000);
     lcd.setCursor(0, 1);
    lcd.print("09 Sec");
  digitalWrite(red, HIGH);
    delay(1000);
    

lcd.setCursor(0, 1);
    lcd.print("08 Second");
  digitalWrite(red, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("07 Second");
  digitalWrite(red, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("06 Second");
  digitalWrite(red, HIGH);
    delay(1000);

lcd.setCursor(0, 1);
    lcd.print("05 Second");
  digitalWrite(red, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("04 Second");
  digitalWrite(red, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("03 Second");
  digitalWrite(red, HIGH);
    delay(1000);
    lcd.setCursor(0, 1);
    lcd.print("02 Second");
  digitalWrite(red, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("01 Second");
  digitalWrite(red, HIGH);
    delay(1000);
lcd.clear();
digitalWrite(red, LOW);




lcd.setCursor(0, 0);
lcd.print("On Yellow Light");
    lcd.setCursor(0, 1);
    lcd.print("05 Second");
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
lcd.setCursor(0, 1);
    lcd.print("04 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
lcd.setCursor(0, 1);
    lcd.print("03 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
  lcd.setCursor(0, 1);
    lcd.print("02 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
  lcd.setCursor(0, 1);
    lcd.print("01 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
  lcd.setCursor(0, 1);
    lcd.print("01 Second");
  
lcd.setCursor(0, 0);
    lcd.print("GoGo Green Light");
lcd.setCursor(0, 1);
    lcd.print("20 Second");
  digitalWrite(green, HIGH);
    delay(1000);

lcd.setCursor(0, 1);
    lcd.print("19 Second");
  digitalWrite(green, HIGH);
    delay(1000);

lcd.setCursor(0, 1);
    lcd.print("18 Second");
  digitalWrite(green, HIGH);
    delay(1000);

lcd.setCursor(0, 1);
    lcd.print("17 Second");
  digitalWrite(green, HIGH);
    delay(1000);

lcd.setCursor(0, 1);
    lcd.print("16 Second");
  digitalWrite(green, HIGH);
    delay(1000);
 
   lcd.setCursor(0, 1);
    lcd.print("15 Second");
  digitalWrite(green, HIGH);
    delay(1000);
 
lcd.setCursor(0, 1);
    lcd.print("14 Second");
  digitalWrite(green, HIGH);
    delay(1000); 
  lcd.setCursor(0, 1);
    lcd.print("13 Second");
  digitalWrite(green, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("12 Second");
  digitalWrite(green, HIGH);
    delay(1000);
    lcd.setCursor(0, 1);
    lcd.print("11 Sec");
  digitalWrite(green, HIGH);
    delay(1000);
     lcd.setCursor(0, 1);
    lcd.print("10 Sec");
  digitalWrite(green, HIGH);
    delay(1000);
     lcd.setCursor(0, 1);
    lcd.print("09 Sec");
  digitalWrite(green, HIGH);
    delay(1000);
    

lcd.setCursor(0, 1);
    lcd.print("08 Second");
  digitalWrite(green, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("07 Second");
  digitalWrite(green, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("06 Second");
  digitalWrite(green, HIGH);
    delay(1000);

lcd.setCursor(0, 1);
    lcd.print("05 Second");
  digitalWrite(green, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("04 Second");
  digitalWrite(green, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("03 Second");
  digitalWrite(green, HIGH);
    delay(1000);
    lcd.setCursor(0, 1);
    lcd.print("02 Second");
  digitalWrite(green, HIGH);
    delay(1000);
lcd.setCursor(0, 1);
    lcd.print("01 Second");
  digitalWrite(green, HIGH);
    delay(1000);
lcd.clear();
digitalWrite(green, LOW);


  lcd.setCursor(0, 0);
lcd.print("Of Yellow Light");
    lcd.setCursor(0, 1);
    lcd.print("05 Second");
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
lcd.setCursor(0, 1);
    lcd.print("04 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
lcd.setCursor(0, 1);
    lcd.print("03 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
  lcd.setCursor(0, 1);
    lcd.print("02 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
  lcd.setCursor(0, 1);
    lcd.print("01 Second");
  
  digitalWrite(yellow, HIGH);
delay(1000);
  digitalWrite(yellow, LOW);
delay(500);
  
}

Credits

DIY Inventor

0 projects • 19 followers

Hello Guys, My name is Krishna Agarwal , and I'm passionate about Making DIY Projects. Here I make Arduino and Robotics related projects.

Contact

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Arduino Traffic Light/ Signal with LCD Counter Display

Arduino Traffic Light/ Signal with LCD Counter Display

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Connect me on

Introduction

Working on Basics

Usage

Prototype Image

Hookup

Uploading and Testing

Watch the Demonstration Video

Custom parts and enclosures

Systematic

Schematics

Circuit Diagram

Code

Code

Credits

DIY Inventor

Comments

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