soundie: a musical touch-sensitive light-up hoodie

Step 8 Sew on your speaker

Sew on the speaker.
Using the same techniques as with the LEDs and other components, sew your speaker onto the garment. With the speaker I used, the + and - petals don't matter, but if you're using a different speaker, be sure to pay attention to which is which. The + petal should be connected to one of the numerical petals of the LilyPad main board (I used petal 9), and the - petal should be connected to the - petal of the LilyPad main board.

Test the speaker.
Here's the code I used to test the speaker. If it works, the speaker should hum a fairly constant C note.

int speakerPin = 9; // speaker connected to digital pin 9

void setup() // run once, when the sketch starts
{
pinMode(speakerPin, OUTPUT); // sets the speakerPin to be an output
}

void loop()
{
beep(speakerPin,2093,1000); //C: play the note C 500ms
}

void beep (unsigned char speakerPin, int frequencyInHertz, long timeInMilliseconds) // the sound producing function
{
int x;
long delayAmount = (long)(1000000/frequencyInHertz);
long loopTime = (long)((timeInMilliseconds*1000)/(delayAmount*2));
for (x=0;x<loopTime;x++)
{
digitalWrite(speakerPin,HIGH);
delayMicroseconds(delayAmount);
digitalWrite(speakerPin,LOW);
delayMicroseconds(delayAmount);
}
}

If the speaker does not work, use the multimeter to test for shorts with the instructions from the previous step.