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Arduino Code

/* Read Jostick

  * ------------

  *

  * Reads two analog pins that are supposed to be

  * connected to a jostick made of two potentiometers

  *

  * We send three bytes back to the comp: one header and two

  * with data as signed bytes, this will take the form:

  *     Jxyrn

  *

  * x and y are integers and sent in ASCII 

  * 

  * http://www.0j0.org | http://arduino.berlios.de

  * copyleft 2005 DojoDave for DojoCorp

  */

 int ledPin = 13;

 int joyPin1 = 0;                 // slider variable connecetd to analog pin 0

 int joyPin2 = 1;                 // slider variable connecetd to analog pin 1

 int value1 = 0;                  // variable to read the value from the analog pin 0

 int value2 = 0;                  // variable to read the value from the analog pin 1

 void setup() {

  pinMode(ledPin, OUTPUT);              // initializes digital pins 0 to 7 as outputs

  Serial.begin(9600);

 }

 int treatValue(int data) {

  return (data * 9 / 1024) + 48;

 }

 void loop() {

  // reads the value of the variable resistor 

  value1 = analogRead(joyPin1);   

  // this small pause is needed between reading

  // analog pins, otherwise we get the same value twice

  delay(100);             

  // reads the value of the variable resistor 

  value2 = analogRead(joyPin2);  

  digitalWrite(ledPin, HIGH);           

  delay(value1);

  digitalWrite(ledPin, LOW);

  delay(value2);

  Serial.print('J');

  Serial.print(treatValue(value1));

  Serial.println(treatValue(value2));

 }