Tangible User Interfaces - Fall 2011

Using the potentiometer as a knob, we have three options on the music box. Turning the knob changes the song, and the color of the led.

 

 

/* Adapted from Theremin, LED, Potentiometer, and lots of other junk

 * --------

 *

 *

 * Most of the credit goes to:

 * copyleft 2006 Tod E. Kurt <tod@todbot.com

 * http://todbot.com/

 */

int aOut = 9;   // LEDs connected to digital pins 9, 10 and 11

int bOut = 10;  //   (Connect cathodes to digital ground)

int cOut = 11;  

int aVal = 0;   // Variables to store the input from the potentiometers

int bVal = 0;  

int cVal = 0; 

 

int ledPin = 13;

int potPin = 0;    // select the input pin for the potentiometer

int speakerPin = 7;

byte names[] = {'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C'};  

int tones[] = {1915, 1700, 1519, 1432, 1275, 1136, 1014, 956};

byte melody[] = "2d2a1f2c2d2a2d2c2f2d2a2c2d2a1f2c2d2a2a2g2p8p8p8p";

byte melody2[] = "4c4c4g4g4a4a8g4f4f4e4e4d4d8c4g4g4f4f4e4e8d4g4g4f4f4e4e8d4c4c4g4g4a4a8g4f4f4e4e4d4d8c";

byte melody3[] = "4g4a4b4g4g4a4b4g4b4c8d4b4c8d2d2e2d2c4b4g2d2e2d2c4b4g4g4d8g4g4d8g";

 

int count = 0;

int count2 = 0;

int count3 = 0;

int MAX_COUNT = 24;

int statePin = LOW;

 

 

 

int val = 0;

 

void setup() {

  pinMode(speakerPin, OUTPUT); 

  pinMode(ledPin, OUTPUT); 

  pinMode(aOut, OUTPUT);   // sets the digital pins as output

  pinMode(bOut, OUTPUT);   

  pinMode(cOut, OUTPUT); 

  Serial.begin(9600);

  Serial.println("ready");

}

 

void loop() {

  digitalWrite(speakerPin, LOW);

  

  val = analogRead(potPin);    // read value from the sensor

  val = map(val, 0, 1023, 0, 255);                 // process the value a little

  //val = val/2;                 // process the value a little

  

  if (val < 85) {

    analogWrite(aOut, 255);    // Send new values to LEDs

    analogWrite(bOut, 0);    // Send new values to LEDs

    analogWrite(cOut, 0);    // Send new values to LEDs

    for (count = 0; count < MAX_COUNT; count++) {

    for (count3 = 0; count3 <= (melody3[count*2] - 48) * 30; count3++) {

      for (count2=0;count2<8;count2++) {

        if (names[count2] == melody3[count*2 + 1]) {       

          digitalWrite(speakerPin,HIGH);

          delayMicroseconds(tones[count2]);

          digitalWrite(speakerPin, LOW);

          delayMicroseconds(tones[count2]);

        } 

        if (melody3[count*2 + 1] == 'p') {

          // make a pause of a certain size

          digitalWrite(speakerPin, 0);

          delayMicroseconds(500);

        }

      }

  }

    }

  }

  else if (val > 171) {

    analogWrite(aOut, 0);    // Send new values to LEDs

    analogWrite(bOut, 255);    // Send new values to LEDs

    analogWrite(cOut, 0);    // Send new values to LEDs

      for (count = 0; count < MAX_COUNT; count++) {

    for (count3 = 0; count3 <= (melody[count*2] - 48) * 30; count3++) {

      for (count2=0;count2<8;count2++) {

        if (names[count2] == melody[count*2 + 1]) {       

          digitalWrite(speakerPin,HIGH);

          delayMicroseconds(tones[count2]);

          digitalWrite(speakerPin, LOW);

          delayMicroseconds(tones[count2]);

        } 

        if (melody[count*2 + 1] == 'p') {

          // make a pause of a certain size

          digitalWrite(speakerPin, 0);

          delayMicroseconds(0);

        }

      }

  }

    }

  }

  

  else {

    analogWrite(aOut, 0);    // Send new values to LEDs

    analogWrite(bOut, 0);    // Send new values to LEDs

    analogWrite(cOut, 255);    // Send new values to LEDs

      for (count = 0; count < MAX_COUNT; count++) {

    for (count3 = 0; count3 <= (melody2[count*2] - 48) * 30; count3++) {

      for (count2=0;count2<8;count2++) {

        if (names[count2] == melody2[count*2 + 1]) {       

          digitalWrite(speakerPin,HIGH);

          delayMicroseconds(tones[count2]);

          digitalWrite(speakerPin, LOW);

          delayMicroseconds(tones[count2]);

        } 

        if (melody2[count*2 + 1] == 'p') {

          // make a pause of a certain size

          digitalWrite(speakerPin, 0);

          delayMicroseconds(0);

        }

      }

  }

    }

  }

}