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After realizing that I couldn't get the code to work with a webcam, I decided to go back to the first possibility with a little more investment. I decided to construct a wall mounted LED display that played a beat based on the light within the room, and flashed different LEDs based on a random number generator. The LED's would in turn change resistances to photo-resistors which would cause a note to be played via the 2nd speaker. This project was not completed due to the complexity of the design and the lesser knowledge of it's programmer.
'''Failed Attempt 1 Code:'''
int potPin = 2; // select the input pin for the potentiometer
char val = ' '; // variable to store the value of potPin as a note
int speakerPin = 9;
int length = 15; // the number of notes
char notes[] = "val"; // a space represents a rest
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
int tempo = 300;
void loop() {
if (analogRead(potPin) = 0-150) {
(int val = "c";)
}
if (analogRead(potPin) = 241-335) {
(int val = "d";)
}
if (analogRead(potPin) = 336-454) {
(int val = "e";)
}
if (analogRead(potPin) = 455-560) {
(int val = "f";)
}
if (analogRead(potPin) = 561-699) {
(int val = "g";)
}
if (analogRead(potPin) = 700-899) {
(int val = "a";)
}
if (analogRead(potPin) = 900-1023) {
(int val = "b";)
}
if (analogRead(potPin) = 151-240) {
(int val = "C";)
}
void playTone(int tone, int duration) {
for (long i = 0; i < duration * 1000L; i += tone * 2) {
digitalWrite(speakerPin, HIGH);
delayMicroseconds(tone);
digitalWrite(speakerPin, LOW);
delayMicroseconds(tone);
}
}
void playNote(char note, int duration) {
char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
// play the tone corresponding to the note name
for (int i = 0; i < 8; i++) {
if (names[i] == note) {
playTone(tones[i], duration);
}
}
}
void setup() {
pinMode(speakerPin, OUTPUT);
}
void loop() {
for (int i = 0; i < length; i++) {
if (notes[i] == ' ') {
delay(beats[i] * tempo); // rest
} else {
playNote(notes[i], beats[i] * tempo);
}
// pause between notes
delay(tempo / 2);
}
}
void loop() {
val = analogRead(potPin); // read the value from the sensor
digitalWrite(ledPin, HIGH); // turn the ledPin on
delay(val); // stop the program for some time
digitalWrite(ledPin, LOW); // turn the ledPin off
delay(val); // stop the program for some time
}