Push Button Switch

Parts

-Arduino microcontroller and carrier board

-LiPo battery

-Push button

Prepare the breadboard

Program the Microcontroller

/**

* @file: switch sensor example

* @date: 3/29/2011

* @DESCRIPTION

* reads a digital input and prints results.

* needs a contact switch

*/

int buttonState =0;

#define buttonPin 2

//--- Function: Setup ()

void setup()

    pinMode(buttonPin, INPUT);

    Serial.begin(9600);

    delay(25);

//--- Function: loop ()

void loop()

    // Reads a digital input on pin 2

    buttonState = digitalRead(buttonPin);

    //prints the result to the serial monitor

    Serial.println(buttonState, DEC);

    if (buttonState == HIGH)

Serial.println("button pressed");

    else

        Serial.println("not pressed");