Interfacing Switch with Arduino

 How to connect a switch with Arduino

Circuit setup

Tutorial Video

See Also: Arduino Development Platform

Practical Video

Example Code for Arduino

/* switch and LED should be connected with pin 3 and 6 respectively. When switch is pressed, LED glows and when switch is released LED is switched off.

*/

const int buttonPin = 3; // Pin connected to the button

const int ledPin = 6;  // Pin connected to LED

void setup() {

  pinMode(buttonPin, INPUT_PULLUP); // Set the button pin as input with internal pull-up resistor

  pinMode(ledPin, OUTPUT);  // Set the button as output

}

void loop() {

  if (digitalRead(buttonPin)) {

    digitalWrite(ledPin,LOW);

  } else {

    digitalWrite(ledPin,HIGH);

  }

  delay(100);

}

See Also: Arduino Development Platform