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This a Knight Rider Style LED Chaser Done with a Arduino Duemilanove with an ATmega328 chip.

Step 1: Step 1

Things you'l need:
6 LEDs (any color)
1 Breadboard
1 100 Ohm Resistor
12 Breadboard Jumpers
1 Arduino Duemilanove "or" Decimila
1 USB cable with A-type connector on one end, and B-type on the other. (See photos)
Arduino IDE software (www.arduino.cc)
1 PC or Laptop with Windows 98' or better

Step 2: Step 2

Follow the schematics for wiring the LED array using your breadboard and jumpers. Don't forget to include the 100 Ohm current limiting resistor, or you'll be replacing your LEDs. the schematic Above indicates which pins  to connect to which LED on the arduino. most arduinos have pin numbers printed right next to the headers on the curcuit board.

Step 3: Step 3

Next you'll need to install the programmig software for the arduino onto your computer. the programming IDE can be downloded for free from: www.arduino.cc download and install the IDE, and sync up your arduino using the USB cable in your materials list. most arduinos come with one, but if yours did not, they can be purchased very cheaply on ebay, or at your local walmart. After the software is in your computer, make sure it is installed correctly, by checking the device manager. for Vista click start, then right click on computer, then manage. the menu on the leftside of your window will have a listing that reads "device manager" click that, and look at your "USB ROOT HUB" if it is installed correctly the you should see the words "USB COMPOSITE DEVICE" somewhere in that list this it is the arduino. close that out. and run the arduino IDE program, in the top tool bar, click tools and go to "Boards" it will list all the arduino boards iin existence, for this project you will need to click on the one called "Duemilanove328" then click tools again, this time go to "serial ports" and click on COM1.In the main field of the IDE editor. Copy and paste the code below.


#define LED1 3
#define LED2 5
#define LED3 7
#define LED4 9
#define LED5 11
#define LED6 13
void setup()
{
{
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
pinMode(LED5, OUTPUT);
pinMode(LED6, OUTPUT);
}
}
void loop()
{
{
digitalWrite(LED1, HIGH);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(LED5, LOW);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, HIGH);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(LED5, LOW);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, HIGH);
digitalWrite(LED4, LOW);
digitalWrite(LED5, LOW);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, HIGH);
digitalWrite(LED5, LOW);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(LED5, HIGH);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(LED5, LOW);
digitalWrite(LED6, HIGH);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(LED5, HIGH);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
digitalWrite(LED4, HIGH);
digitalWrite(LED5, LOW);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, HIGH);
digitalWrite(LED4, LOW);
digitalWrite(LED5, LOW);
digitalWrite(LED6, LOW);
delay(200);
digitalWrite(LED1, LOW);
digitalWrite(LED2, HIGH);
digitalWrite(LED3, LOW);
digitalWrite(LED4, LOW);
digitalWrite(LED5, LOW);
digitalWrite(LED6, LOW);
delay(200);
}
}

or you can type it in manually,but its easier to cut & paste.
Next you'll need to verify the sketch/ code. click the icon shaped like a play btton, and wait for it to compile. then look at the black windows at the bottom of the IDE window. if there is no red error text, then click the icon the looks like a right fcing triangle with 2 dotted vertical lines. "make sur our arduino is plugged into the USB port before you click it. the arduino will flicker 2 LEDs that are built into the board. this means its recieving the programming you just cut & pasted. the black window will say "upload complete" when its done. the program will run automatically after uploading and will continue to do so until you unplug the USB cable. if you wnt it to work without the computer, you'll need a 9voltt 300 miliamp DC power adapter, otherwise know as a wall-wart. if you do get red error text when you compile the code. www.arduino.cc has forums to help you troubleshoot and solve your problem. Make sure to save your code/ sketch so you can re-upload the cde if yu need to. in the IDE, go to "file" then to save as, and type knightriderledchaser and click ok, your sketch isnow saved. to recal this sketch, start the IDE, click "file" go to "sketchbook" and click on your sketch.



Where did you get that keyboard?
Ebay! search for foldable silicone key board. Got mine for around $10.
Thanks for posting this - I'm working on a similar project and had each LED wired to it's own resistor... saw you'rs and I'm like DUH: They're DIOIDEs.
Kind overkill using an Arduino for such a project. But, it's a good starter project, actually was the second thing I did with a microcontroller (ATtiny13).
It was meant as a starter project for those new to arduino, I can do thousands of more complicated things with this little board.

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