Second led

You should by now be able to control the on-board LED and get it flashing at different rates.

We are now going to build a circuit for a second led that we put on the little extra breadboard because there's more room there.

Our aim is to get two leds flashing, one on board one on the little breadboard.

The remainder of the information is about leds.

http://elecrom.wordpress.com/2008/03/02/anode-and-cathode-of-led/

/*

Blink

Turns on an LED on for one second, then off for one second, repeatedly.

The circuit:

* LED connected from digital pin 13 to ground.

* Note: On most Arduino boards, there is already an LED on the board

connected to pin 13, so you don't need any extra components for this example.

Created 1 June 2005

By David Cuartielles

http://arduino.cc/en/Tutorial/Blink

based on an orginal by H. Barragan for the Wiring i/o board

*/

int ledPin = 13; // LED connected to digital pin 13

int redLedPin = 12; // LED connected to digital pin 13

int del =500 ;//500;

// The setup() method runs once, when the sketch starts

void setup() {

// initialize the digital pin as an output:

pinMode(ledPin, OUTPUT);

pinMode(redLedPin, OUTPUT);

Serial.begin(9600);

}

// the loop() method runs over and over again,

// as long as the Arduino has power

void loop()

{

digitalWrite(ledPin, HIGH); // set the LED on

digitalWrite(redLedPin, LOW); // set the LED on

Serial.println("Red Low");

delay(del); // wait for a second

digitalWrite(ledPin, LOW); // set the LED off

digitalWrite(redLedPin, HIGH); // set the LED off

delay(del); // wait for a second

}

//Random Numbers Program, generates 100 random numbers between 1 and 10 long randNumber;

void setup(){
Serial.begin(9600);
randomSeed(analogRead(0));
for (int i=0; i<100; randnumber =" random(0,">