Assignment: Input / Output Coincidence Lab Assignment

Collaborators:

Assignment: Input / Output Coincidence Lab Assignment

Description:

I created a "music box".  I modifed the melody from the melody program in the lab.  I added a photocell and an LED to the circuit.  When the box lid is removed a song plays and the LED flashes.  When the lid is replaced, both the music and the image shut off.

Materials:

• breadboard
• Piezo Speaker
• LED
• Photocell
• resistor

Arduino Code:

/* Play Melody
* -----------
*
* Program to play melodies stored in an array, it requires to know
* about timing issues and about how to play tones.
*
* The calculation of the tones is made following the mathematical
* operation:
*
*       timeHigh = 1/(2 * toneFrequency) = period / 2
*
* where the different tones are described as in the table:
*
* note     frequency     period     PW (timeHigh)   
* c             261 Hz             3830     1915    
* d             294 Hz             3400     1700    
* e             329 Hz             3038     1519    
* f             349 Hz             2864     1432    
* g             392 Hz             2550     1275    
* a             440 Hz             2272     1136    
* b             493 Hz             2028    1014   
* C            523 Hz            1912     956
*
* (cleft) 2005 D. Cuartielles for K3
* modified by Heather Dolan - based on play melody and theramin code from lab, melody has been modified
* October 7, 2009
*/

int ledPin = 3;
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";
byte melody[] = "2c2c2g2g2a2a2g2f2f2e2e2d2d2c2g2g2f2f2e2e2d2c2c2g2g2a2a2g2f2f2e2e2d2d4c"; //melody
// 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 statePin = LOW;
int potPin = 2;
int currentVal = 0;

int val = 0;

void setup() {
//pinMode(speakerPin, OUTPUT);
Serial.begin(9600);
Serial.println("ready");

pinMode(ledPin, OUTPUT);
pinMode(speakerOut, OUTPUT);
val=analogRead(potPin);
}

void loop() {
val=analogRead(potPin);
Serial.println(val);
if (val!=currentVal){
// val=analogRead(potPin);
currentVal=val;
Serial.println(val);
}
if(val<300) {
digitalWrite(speakerOut, LOW);
}
else{ 
if(val >= 300){   //if the photocell is detecting light, play the melody and flash the light
for (count = 0; count < MAX_COUNT; count++) {
statePin = !statePin;
digitalWrite(ledPin, statePin);
digitalWrite(speakerOut, LOW);
for (count3 = 0; count3 <= (melody[count*2] - 48) * 30; count3++) {
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(50);
}
}
}
}
}
else{}
}
}