Blink problem

Projects General Guidance
1

I have just purchased my first Arduino from Sparkfun and successfully set up the board for the blink program all was well until I tried to change the pin allocation for the LED. The Sparkfun booklet supplied says..."then in the code change the line:int ledpin = 13; to int led pin = newpin however this is not shown as the code line for the uploaded program fro the web site. The sample blink program reads...
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.

This example code is in the public domain.
*/

void setup() {
// initialize the digital pin as an output.
// Pin 13 has an LED connected on most Arduino boards:
pinMode(13, OUTPUT);
}

void loop() {
digitalWrite(13, HIGH); // set the LED on
delay(1000); // wait for a second
digitalWrite(13, LOW); // set the LED off
delay(1000); // wait for a second
}

I have tried changing the 10 to another pin in the line... "pinMode(13, OUTPUT);" but it will not work. Not happy with the very first simple attempt. AmI missing somthing obvious?
Mark :

2 
/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
 
  This example code is in the public domain.
 */
const int ledPin = 13;  // << change this line
void setup() {                
  // initialize the digital pin as an output.
  pinMode(ledPin, OUTPUT);     
}

void loop() {
  digitalWrite(ledPin, HIGH);   // set the LED on
  delay(1000);              // wait for a second
  digitalWrite(ledPin, LOW);    // set the LED off
  delay(1000);              // wait for a second
}
3

Assuming that you have an led (and a resistor) correctly connected to pin 10, the problem is likely that you will need to change 13 to 10 in the digitalWrite statements in loop too. Better, define ledpin as your tutorial suggests and use it instead of changing the number all over the code. Then you can switch pins by changing just the declaration of ledpin. Or, just listen to AWOL - he types faster :wink: