Lesson 09: Using Switch and Push Buttons with Arduino

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We learn how a switch turns ON and OFF a bulb. We learn how to use push button or switch with resistor and without resistor with Arduino. Using INPUT_PULLUP has been explaiend.


 /*
 * S01-09 Push Button 
 * Written by Ahmad Shamshiri
 
 Please watch video instruction here https://youtu.be/3K996EfPiXM
 This code is available at http://robojax.com/course1/?vid=lecture09
 
 with over 100 lectures Free On  YouTube Watch it here http://robojax.com/L/?id=338
Get the code for the course: http://robojax.com/L/?id=339 
 * Written by Ahmad Shamshiri for Robojax, robojax.com http:youTube.com/robojaxTV
 * on Dec 24, 2018 in Ajax, Ontario, Canada
 * 
 */

void setup() {
  pinMode(2, INPUT);// define pin 2 as input
  Serial.begin(9600);// initialize the serial monitor
                     // with 9600 baud
  Serial.println("Push button Test");
  pinMode(8, OUTPUT);

}

void loop() {
		//Robojax Step By Step Arduino Course http://robojax.com/L/?id=338
 int pushButtonValue = digitalRead(2);
 if(pushButtonValue == LOW)
 {
  Serial.println("Button pushed");
  digitalWrite(8,HIGH);// turn ON the LED
 }else{
  //Serial.println("Button NOT pushed");
  digitalWrite(8, LOW);// turn OFF the LED
 }
 delay(100);
}

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