Arduino KiTT From KnightRider - AKA Larson Scanner

In this quick example, we'll see how to make a beautiful Larson Scanner as in the TV show Knight Rider.


Circuit 
You can make it any number of LEDs you like. Here is the code that moves 6 LEDs in sequence.

This project is called LED chaser or Larson Scanner

Code

/* Knight Rider 3
 * --------------
 *
 * This example concentrates on making the visuals fluid.
 *
 *
 * (cleft) 2005 K3, Malmo University
 * @author: David Cuartielles
 * @hardware: David Cuartielles, Aaron Hallborg
 */

int pinArray[] = {2, 3, 4, 5, 6, 7};
int count = 0;
int timer = 30;

void setup(){
  for (count=0;count<6;count++) {
    pinMode(pinArray[count], OUTPUT);
  }
}

void loop() {
  for (count=0;count<5;count++) {
   digitalWrite(pinArray[count], HIGH);
   delay(timer);
   digitalWrite(pinArray[count + 1], HIGH);
   delay(timer);
   digitalWrite(pinArray[count], LOW);
   delay(timer*2);
  }
  for (count=5;count>0;count--) {
   digitalWrite(pinArray[count], HIGH);
   delay(timer);
   digitalWrite(pinArray[count - 1], HIGH);
   delay(timer);
   digitalWrite(pinArray[count], LOW);
   delay(timer*2);
  }
}

This is the Larson scanner effect that was presented in the famous knight rider series in the 80's.

It featured a smart autonomous car that had a talking on-board computer.

I'd like to mention that this project was one of my first things to make when I started to learn embedded systems using PIC16F84A microcontroller.

Here is my actual circuit

This is Proteus simulation of the circuit

I made this project and posted it in Arabic and English languages. I didn't post a video for it but I still have the circuit.

http://arabic-embedded-egypt.blogspot.com.eg/2010/05/led-chaser.html

http://embedded-egypt.blogspot.com.eg/2009/06/led-chaser-larson-scanner.html

So I'll post a video soon.

Source: Arduino Website , instructables