Sensor Exercise (Chip + Daniel)

We did a simple output exercise, using switch button to turn on and off the LED light. Below is our abstraction plan with the real wiring photo and the code.

/*

  Daniel Galan, Chip Dong Lim
  DES387 Spring 2014, Professor Dominic Muren

  Button Sensor Exercise

 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.

 */

// constants won't change. They're used here to 

// set pin numbers:

const int buttonPin = 2;     // the number of the pushbutton pin

const int ledPin =  13;      // the number of the LED pin

// variables will change:

int buttonState = 0;         // variable for reading the pushbutton status

void setup() {

  // initialize the LED pin as an output:

  pinMode(ledPin, OUTPUT);      

  // initialize the pushbutton pin as an input:

  pinMode(buttonPin, INPUT);     

}

void loop(){

  // read the state of the pushbutton value:

  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.

  // if it is, the buttonState is HIGH:

  if (buttonState == LOW) {    // Ground 

    // turn LED on:    

    digitalWrite(ledPin, LOW);  

  } 

  else {

    // turn LED off:

    digitalWrite(ledPin, HIGH); // 5v

  }

}