Lab 1: The Blinking Led

Description

For this lab we built our first circuit using the Arduino Uno. I connected the Arduino Uno to a Macbook Pro and changed the example code of "Blink" to turn on the led for 4 seconds and off for 2 seconds.

Components

1 Arduino Uno

1 Breadboard

1 red led

1 220 Ohm resistor

cables

Code

/*

 The Blinking Led

Turns on an LED on for 4 seconds, then off for 2 seconds, repeatedly.

 */

// Pin 13 has an LED connected on the Arduino board. Let's name it ledPin.

int ledPin = 13;

// the setup routine runs once when you press reset:

void setup() {                

  // initialize the digital pin as an output.

  pinMode(ledPin, OUTPUT);     

}

// the loop routine runs over and over again forever:

void loop() {

  digitalWrite(ledPin, HIGH);   // turn the LED on (HIGH is the voltage level)

  delay(4000);               // wait for 4 seconds

  digitalWrite(ledPin, LOW);    // turn the LED off by making the voltage LOW

  delay(2000);               // wait for 2 seconds

}