Venom's Toy Story

 
DESCRIPTION
In this lab, I worked with a DC Motor to work with rotational movement as an output to some other input. I did this by attaching a DC Motor to a small and light toy and have it react to the values from the photoreceptor. When dark, the motor whirrs and the music plays, as if there's a "party" in the toy box. (Very similar to the Toy Story premise of the toys having a life of their own while no one is watching.) The music is also initiated by receiving a "dark" value from the photoreceptor. 
Video: http://instagram.com/p/fzB-uJxyd0/
MATERIALS
1 - Arduino Uno
1 - Breadboard
1 - USB Cable
1 - 220 Ohm Resistor
1 - diode
1 - transistor 
1 - Photoreceptor
1 - Piezo Speaker
1 - Battery Pack
1 - DC Motor
6 - Wires
Shoe box and toys

CODE

/*

 * one pot fades one motor

 * modified version of AnalogInput

 * by DojoDave <http://www.0j0.org>

 * http://www.arduino.cc/en/Tutorial/AnalogInput 

 * Modified again by dave

 */

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

int motorPin = 9; // select the pin for the Motor

int speakerOut = 7;               

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

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

byte melody[] = "2d2a1f2c2d2a2d2c2f2d2a2c2d2a1f2c2d2a2a2g2p8p8p8p";

// count length: 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0

//                                10                  20                  30

int count = 0;

int count2 = 0;

int count3 = 0;

int MAX_COUNT = 24;

int motorVal = 0;

int val = 0;      // variable to store the value coming from the sensor

void setup() {

  pinMode(speakerOut, OUTPUT); 

  Serial.begin(9600);

  Serial.println("ready");

}

void loop() {

  digitalWrite(speakerOut, LOW);     

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

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

      val = analogRead(potPin);    // read the value from the sensor, between 0 - 1024

      motorVal = 3 - val;

      analogWrite(motorPin, motorVal*35); // analogWrite can be between 0-255

      Serial.println(val);       // writing the value to the PC via serial connection 

      if (val<1) {

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

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

            digitalWrite(speakerOut,HIGH);

            delayMicroseconds(tones[count2]);

            digitalWrite(speakerOut, LOW);

            delayMicroseconds(tones[count2]);

          } 

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

            // make a pause of a certain size

            digitalWrite(speakerOut, 0);

            delayMicroseconds(500);

          }

        }

      }

      else {

        delayMicroseconds(500);

      }

    }

  }

}