March Madness Challenge - Day 20

Allright. Something interesting for the night. Updated the accelerated LED project, and added a piezo buzzer. So now I offer you the AnnoyALatron 2000. All the RGB goodness brought to you with sound. It's a shaky device that changes pitch as you shake it. Who knew vigorous shaking could do so much for so few. :-P


http://www.youtube.com/watch?v=qobngrJLDNw

/*
* The AnnoyAlatron 2000
* 
* Accelorometer  controled red, green, blue leds, and piezo buzzer
* ADXL335
*/
#define NOTE_C6  1047
#define NOTE_E6  1319
#define NOTE_G6  1568

int notes[] = {
  NOTE_C6, NOTE_E6,NOTE_G6 };

int piezoPin = 8;
int greenPin = 9;    // LED connected to digital pin 9
int redPin = 10;
int bluePin = 11;
int Z = 0;
int Y = 1;
int X = 2;
int r,g,b = 0;
int xmax, ymax, zmax = 0;
int xmin, ymin, zmin = 1024;
float xg, yg, zg;

void rgb (int r, int g, int b) 
{
     analogWrite(redPin, r);
     analogWrite(greenPin, g);
     analogWrite(bluePin, b);
     
}


//From the Adafruit forums
float to_g(const int axis_value) 
{
  const float arduino_power_supply = 5;
  const float sensor_power_supply = 3.3;
  const float zero_g_bias = sensor_power_supply / 2;
  float voltage = axis_value * arduino_power_supply / 1024;
  return (voltage - zero_g_bias) * 1000 / 330;
}

void setup()  
{ 
  Serial.begin(19200);
  Serial.println("Setup done");
  tone(piezoPin, notes[0], 200);
  tone(piezoPin, notes[1], 200);
  tone(piezoPin, notes[2], 200);

} 


void loop()  
{

  r = analogRead(Z);
  g = analogRead(Y);
  b = analogRead(X);
  
  xg = to_g(b);
  yg = to_g(g);
  zg = to_g(r);  
  
  Serial.print(" X: ");
  Serial.print(b);
  Serial.print(" xg: ");
  Serial.print(xg);
  Serial.print(" Y: ");
  Serial.print(g);
  Serial.print(" yg: ");
  Serial.print(yg);
  Serial.print(" Z: ");
  Serial.print(r);
  Serial.print(" zg: ");
  Serial.println(zg);
 
  xmin = min(xmin, b);
  ymin = min(ymin, g);
  zmin = min(zmin, r);
  
  xmax = max(xmax, b);
  ymax = max(ymax, g);
  zmax = max(zmax, r);
  
  tone(piezoPin, (r + notes[0]), 10);
  tone(piezoPin, (g + notes[1]), 10); 
  tone(piezoPin, (b + notes[2]), 10);

  r = map(r, zmin, zmax, 0, 255);
  g = map(g, ymin, ymax, 0, 255);
  b = map(b, xmin, xmax, 0, 255);
      
  rgb(r, g, b);

}