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Lesson 98: Arduino 10 LED Push button Projects, Potentiometer LED Voltmeter and Traffic Light

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Lesson 98: Arduino 10 LED Push button Projects, Potentiometer LED Voltmeter and Traffic Light

Please select other codes for this lecture from the links below.

Part 1: Introduction

In this lesson we learn how to use LED and Push button in this 10 LED projects. Wiring diagram is shown, code is fully explained and demonstrated with multiple change of settings for each project. We read potentiometer's voltage and display voltage by turning each LED on to represent voltages. A Simple traffic light project.
This code is part of video lecture. This project 10 code. We have three LEDs, Red, Green and Yellow. We will set the time for each LED to be turned ON. Of course the timing can be changed and in some countries the sequence may vary like yellow and gree might be ON at the same time for short period. But this is very simple basic Traffic light.

  • 1:16 LED and resistor calculation
  • 05:52 Projec 1 LED ON OFF
  • 12:41 Projec 2 LED ON/OFF with push button
  • 17:12 Projec 3 LED ON/OFF toggle with push button
  • 20:10 Projec 4 Fading light of LED
  • 23:17 Projec 5 Fading light of LED using push button
  • 27:30 Projec 6 See Saw with LED using Arduino
  • 30:44 Projec 7 Walking Light Using Arduino
  • 36:38 Projec 8 Walking light with push button using Arduino
  • 42:21 Projec 9, 5 LED voltage level meter using Arduino
  • 49:21 Projec 10 Arduino Traffic Light

 /*
 * Arduino Step by Step Course by Robojax
 * Lesson 98  https://robojax.com/course1/?vid=lecture98
 * Project 10 of 10
 * 
 * This code is basic Traffic Light. 
 * We have three LEDs, Red, Green and Yellow.
 * We will set the time for each LED to be turned ON.
 * Of course the timing can be changed and in some countries 
 * the sequence may vary like yellow and gree might be ON
 * at the same time for short period. But this is very simple basic
 * Traffic light
 * 
 * Watch full details and demonstraiton: https://youtu.be/OSwleCBlkuI
 * 
 * Start a full Arduino Step By Step course:  https://youtu.be/-6qSrDUA5a8
 * 
 ****** 10 Projects explained in this video
 * 1-LED ON OFF 
 * 2-LED ON/OFF with push button
 * 3-LED ON/OFF toggle with push button
 * 4-Fading light of LED
 * 5-Fading light of LED using push button
 * 6-See Saw with LED
 * 7-Walking Light
 * 8-Walking light with push button
 * 9-LED voltage level meter
 * 10- Arduino Traffic Light
 * 
 * What pars we need:
 * -Of course Arduino board (UNO , Nano, Mega or any)
  
 * -RED, GREEN and YELLOW LED eitehr 5mm or 3mm
 * -200ohm to 1000 ohrm resistor for each LED
 * -Some dupont wires to connec 
 * -If don't want to solder, then use breadboard
 * 
  * written by Ahmad Shamshiri on Jan 30, 2022
 * in Ajax, Ontario, Canada
 * www.Robojax.com

If you found this tutorial helpful, please support me so I can continue creating 
content like this. Make a donation using PayPal by credit card https://bit.ly/donate-robojax
  
 * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 * 
 */
const int greenLEDPin  = 4;
const int yellowLEDPin = 3;
const int redLEDPin    = 2;


const int greenONTime = 10000;
const int redONTime = 10000;
const int yellowONTime = 3000;

void setup() {

  Serial.begin(9600);
  Serial.println("Robojax Traffic Light");
  pinMode(greenLEDPin, OUTPUT);
  pinMode(redLEDPin, OUTPUT); 
  pinMode(yellowLEDPin, OUTPUT);  

}

void loop() {

  digitalWrite(greenLEDPin, HIGH);
    Serial.println("GREEN ON");  
  delay(greenONTime);
    Serial.println("	GREEN OFF");
  digitalWrite(greenLEDPin, LOW);


  digitalWrite(yellowLEDPin, HIGH);
    Serial.println("		YELLOW ON");   
  delay(yellowONTime);
    Serial.println("			YELLOW OFF");    
  digitalWrite(yellowLEDPin, LOW);  

  digitalWrite(redLEDPin, HIGH);
      Serial.println("				RED ON");  
  delay(redONTime);
      Serial.println("					RED OFF");  
  digitalWrite(redLEDPin, LOW);    
  // Watch full details and demonstraiton: https://youtu.be/7xTHaFdCyaI
}// loop end

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