3 – Push Button LED

3 Push button LED

 

/*
 Button
 
 Turns on and off a light emitting diode(LED) connected to digital 
 pin 13, when pressing a pushbutton attached to pin 2. 
 
 
 The circuit:
 * LED attached from pin 13 to ground 
 * pushbutton attached to pin 2 from +5V
 * 10K resistor attached to pin 2 from ground
 
 * Note: on most Arduinos there is already an LED on the board
 attached to pin 13.
 
 
 created 2005
 by DojoDave <http://www.0j0.org>
 modified 30 Aug 2011
 by Tom Igoe
 
 This example code is in the public domain.
 
 http://www.arduino.cc/en/Tutorial/Button
 */
const int buttonPin = 2; 
const int ledPin =  13;  
int buttonState = 0;  
void setup() {
pinMode(ledPin, OUTPUT);      
pinMode(buttonPin, INPUT);    }
void loop(){
buttonState = digitalRead(buttonPin);
if (buttonState == HIGH) {    
digitalWrite(ledPin, HIGH);  
} 
else {
digitalWrite(ledPin, LOW); 
  }
}

 

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