/*
 * Arduino Step by Step Course by Robojax
 * Lesson 98  https://robojax.com/course1/?vid=lecture98
 * Project 10 of 10
 * 
 * This code is a 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; for example, yellow and green might be ON
 * at the same time for a short period. But this is a very simple, basic
 * traffic light.
 * 
 * Watch full details and demonstration: 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 parts we need:
 * -Of course, an Arduino board (UNO, Nano, Mega, or any)
  
 * -RED, GREEN, and YELLOW LEDs, either 5mm or 3mm
 * -200ohm to 1000 ohm resistors for each LED
 * -Some Dupont wires to connect
 * -If you don't want to solder, then use a 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 or a 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 downloaded 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("\tGREEN OFF");
  digitalWrite(greenLEDPin, LOW);


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

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