Lesson 63: Introduction to using relay with Arduino

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Part 6: Using Relay with Arduino

In this lesson we learn about relay and how it functions. Then give example of electromagnet and how relay function internally. The wiring of a relay module is shown and code is explained.

00:00 Introduction
08:32 Relay power rating
09:54 Wiring Explained
11:39 Code Explained
13:31 Demonstration


  /*
 * Lesson 63: Introduction to using relay with Arduino 
 * This Arduino Sketch controls 5V relay module by turning it ON
 * or OFF at the set intervals
 Watch full detailed video: https://youtu.be/N-xbxtGGoHw
 * 
 
 * Written by Ahmad Shamshiri  
 * on Dec 26, 2018 in Ajax, Ontario, Canada
 * 
 This video is part of Arduino Step by Step Course which starts here: https://youtu.be/-6qSrDUA5a8

 

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 *  * 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/>.
 */

int relayPin = 2;// define output pin for relay 

void setup() {
  pinMode(relayPin, OUTPUT);// define pin 2 as output

}

void loop() {
  
  digitalWrite(relayPin, LOW); // turn the relay ON 
  delay(200); // wait for 3 seconds
  digitalWrite(relayPin, HIGH);// // turn the relay OFF 
  delay(200);// wait for 1 second

  digitalWrite(relayPin, LOW); // turn the relay ON 
  delay(200); // wait for 3 seconds
  digitalWrite(relayPin, HIGH);// // turn the relay OFF 
  delay(200);// wait for 1 second

  digitalWrite(relayPin, LOW); // turn the relay ON 
  delay(2000); // wait for 3 seconds
  digitalWrite(relayPin, HIGH);// // turn the relay OFF 
  delay(1000);// wait for 1 second   
}

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