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[on:]

  I just purchased an Arduino UNO from Radio Shack. I am reading your book "Getting Started with Arduino". I downloaded the software to my PC Windows 7 Ultimate. I created the sketch as indicated in the book Page 31 but the led does not change on and off rate.  I changed the on and off to 2 on 6 off but it blinks the same.

HELP! Manny from Puerto Rico

//This my first sketch on Arduono
//This sketch will light a LED on and off
//Every eight seconds.

const int LED = 13; // LEDE connected to
                    //digital pin 13
                   
                   
void setup()
{
  pinMode(LED,OUTPUT);
                         
}

void loop()
{
  digitalWrite(LED,HIGH);  //Turns the led on
  delay(2000);           //Waits for 2 seconds
  digitalWrite(LED,LOW);  //Turns the LED OFF
  delay(6000);
}

[Reply #1 on:]

mannypac,  I ran the code on my Uno and it lit the led for 2 seconds, then turned it off for 6.  Are you sure you uploaded your changes to the board after you made the changes?

[Reply #2 on:]

Welcome to the forum, hope you have fun with Arduino!

For future reference, please see:
http://arduino.cc/forum/index.php/topic,148850.0.html

Item #7 illustrates how to properly post code.