Music Box won't run on battery power?

Hello!
I am very very new at arduino stuff and I have a project for class that I am having a bit of trouble with. I am trying to make a music box (click a button and it causes a stepper motor to spin and a buzzer to play the ~tunes~), and it runs perfectly fine when attached to my laptop via USB. For the project I'm doing it needs to be 'free standing,' so to speak, and I cannot for the life of me get it to run on battery power. It plays the first note of the song and then stops? Not sure why.

Here is my code:

/*
notes
 */
#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978
#define REST      0

#include <Stepper.h>


const int stepsPerRevolution = 800;  // change this to fit the number of steps per revolution for your motor
const int motorSpeed = 10; //RPM
const int buttonPin = 13; // the number of the pushbutton pin

int buttonState = 0; // variable for reading the pushbutton status

int tempo = 76; // change this to make the song slower or faster
int Buzz = 6; // change this to whichever pin you want to use
int melody[] = {  // notes of the moledy followed by the duration. - a 4 means a quarter note, 8 an eighteenth , 16 sixteenth, so on - !!negative numbers are used to represent dotted notes, so -4 means a dotted quarter note, that is, a quarter plus an eighteenth!!
  NOTE_G4, 8, NOTE_G4, 8, //1
  NOTE_AS4, -4, NOTE_G4, 8, NOTE_G4, 8,
  NOTE_AS4, -4, REST, 4, NOTE_G4, 8, NOTE_AS4, 8,
  NOTE_DS5, 4, NOTE_D5, -4, NOTE_C5, 8,
  NOTE_C5, 4, NOTE_AS4, 4, NOTE_F4, 8, NOTE_G4, 8,
  NOTE_GS4, 4, NOTE_F4, 4, NOTE_F4, 8, NOTE_G4, 8,
  NOTE_GS4, 4, REST, 4, NOTE_F4, 8, NOTE_GS4, 8,
  NOTE_D5, 8, NOTE_C5, 8, NOTE_AS4, 4, NOTE_D5, 4,

  NOTE_DS5, 4, REST, 4, NOTE_DS4, 8, NOTE_DS4, 8, //8
  NOTE_DS5, 2, NOTE_C5, 8, NOTE_GS4, 8,
  NOTE_AS4, 2, NOTE_G4, 8, NOTE_DS4, 8,
  NOTE_GS4, 4, NOTE_AS4, 4, NOTE_C5, 4,
  NOTE_AS4, 2, NOTE_DS4, 8, NOTE_DS4, 8,
  NOTE_DS5, 2, NOTE_C5, 8, NOTE_GS4, 8,
  NOTE_AS4, 2, NOTE_G4, 8, NOTE_DS4, 8,
  NOTE_GS4, 4, NOTE_G4, 4, NOTE_F4, 4,
  NOTE_DS4, 2
};

int notes = sizeof(melody) / sizeof(melody[0]) / 2;  // sizeof gives the number of bytes, each int valsmaue is composed of two bytes (16 bits) - there are two values per note (pitch and duration), so for each note there are four bytes
int wholenote = (60000 * 4) / tempo; // this calculates the duration of a whole note in ms
int divider = 0, noteDuration = 0;

Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11); // initialize the stepper library on pins 8 through 11:

/* -------------------------------------------------------------------------------------------------*/

void setup() {             // set the speed at 10 rpm:
  myStepper.setSpeed(10);  // initialize the serial port:
  Serial.begin(9600);

  pinMode(buttonPin, INPUT_PULLUP);  // initialize the pushbutton pin as an input:
  pinMode(Buzz, OUTPUT);
  
}



void loop () {  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);
  
  if (buttonState == LOW) {   // check if the pushbutton is pressed. If it is, the buttonState is LOW:
     songPlay();
//     myStepper.step(songLength);
  } 
}


void songPlay () {
  for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {  // iterate over the notes of the melody. // Remember, the array is twice the number of notes (notes + durations)

    divider = melody[thisNote + 1];  // calculates the duration of each note
    if (divider > 0) {
     
      noteDuration = (wholenote) / divider; // regular note, just proceed
    } else if (divider < 0) {
     
      noteDuration = (wholenote) / abs(divider); // dotted notes are represented with negative durations!!
      noteDuration *= 1.5; // increases the duration in half for dotted notes
    }
     tone(Buzz, melody[thisNote], noteDuration * 0.9); // we only play the note for 90% of the duration, leaving 10% as a pause
     delayAndRun(noteDuration);  // Wait for the specief duration before playing the next note.
     noTone(Buzz);   // stop the waveform generation before the next note.
    }
}

void delayAndRun(long d) {
  long currentTime = millis();
  while (currentTime + d > millis()) {
    myStepper.step(1);  
  }
}

Processing: swillia1_FinalTD3Project.ino...

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Thank you! Didn't know about that. :slight_smile:

I do not think it is your code, it works when powered by the USB. I think you will find your problem is in the power supply. Something relative simple like the battery cannot supply the necessary power. Maybe the voltage is dropping to low or is wrong. You need a voltmeter of some type to check this out or go to higher capacity batteries. If you are using a 9V battery no need to go further that is the problem. Your pretty picture frizzy thing is not much help as it does not show the power and ground sources and connections. A schematic would be much better.