Color Mixer [by Jenny]

http://vimeo.com/moogaloop.swf?clip_id=1878910&server=vimeo.com&show_title=1&show_byline=1&show_portrait=0&color=&fullscreen=1
Color Mixer from Jennifer Dopazo on Vimeo.

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/*
* This code has been modified from the Coffe Cup Color Mixer
* at http://arduino.cc/en/Tutorial/LEDColorMixerWith3Potentiometers
*/

// Setting up the analog pin with the potentiometer
int AnalogPot = 3;    // potentiometer connected to pin 3

// Setting up the digital pins with the LEDs
int redLED = 9;       //  red LED connected to pin 9
int greenLED = 10;  //  green LED connected to pin 10
int yellowLED = 11; //  yellow LED connected to pin 11

// Initial Values
int potVal = 0;   // the variable to store the input from the potentiometer
int redVal = 0;   // the variable to store the value of red LED
int greenVal = 0;  // the variable to store the value of green LED
int yellowVal = 0;  // the variable to store the value of yellow LED

// Variables for comparing values between loops
int i = 0;           // Loop counter
int wait = (1000);    // Delay between most recent pot adjustment and output

int sens         = 3; // Sensitivity threshold, to prevent small changes in
                      // pot values from triggering false reporting
// FLAGS
int PRINT = 1; // Set to 1 to output values

void setup()
{
  pinMode(redLED, OUTPUT);   // sets the digital pins as output
  pinMode(greenLED, OUTPUT);   
  pinMode(yellowLED, OUTPUT);
  Serial.begin(9600);     // Open serial communication for reporting
}

void loop()
{
  i += 1; // Count loop

  potVal = analogRead(AnalogPot);       // read input pins, convert to 0-255 scale

 

if (potVal< 341)
  {
    potVal= (potVal* 3) / 4;                      //normalize to 0-255
    redVal= 255-potVal;
    greenVal= potVal;
    yellowVal= 1;                                       //yellow off
  } //end of if
else if (potVal< 682)
  {
    potVal= ((potVal-341)*3) / 4;         //normalize to 0-255
    redVal= 1; //red off
    greenVal= 255-potVal;
    yellowVal= potVal;
  } //end of else if
  else
  {
    potVal= ((potVal-682)*3)/ 4;         //normalize to 0-255
    redVal= potVal;
    greenVal= 1; //green off
    yellowVal= 255-potVal;
  } //end of else

analogWrite(redLED, redVal);       // Send the new value to LEDs
analogWrite(greenLED, yellowVal);
  analogWrite(yellowLED, greenVal);

 

if (i % wait == 0)                               // If enough time has passed...
  {   
    if ( potVal > sens )                         // If old and new values differ
                                                              // above sensitivity threshold
    {
     if (PRINT)                                   // …and if the PRINT flag is set…
      {
        Serial.print("The value of potentiometer: ");        // …then print the values.
        Serial.print(potVal);         

        PRINT = 0;
      }
    }
    else
    {
      PRINT = 1;  // Re-set the flag   
    }

  }
}