Musical Treasure Box

Play a custom tune when your treasure box is opened to warn you someone may be trying to thieve your stuff!

Aug 14, 2020

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7494 views

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2 respects

crack the code

songs

codequest

Components and supplies

Mini breadboard

Trim Potentiometer

Jumper wires (generic)

Resistor 10k ohm

Arduino UNO

Male/Female Jumper Wires

I used an old Tjena box but any box will do

LDR, 5 Mohm

Buzzer, Piezo

ESD Tape, Masking

Apps and platforms

Arduino IDE

Project description

Code

LightSensingBuzzer

arduino

Firstly, take a look at the section of code from about lines 30 through to 59. This section determines what tune will be played and at what speed (via tempo value). The current tune has a total of 19 notes and rests. This is the value of songLength (line 31). You must edit this value to match the number of notes/rests in your tune. Edit the song length on line 29 to reflect the number of notes in your song. Include all the notes and rests in the count. Follow the commented instructions in the code when editing the notes and the beats array. You'll need some understanding of how musical compositions work to code your own tune. You can expect to spend some time getting the timing of the notes correct. Speed up or slow down the tune by changing the Tempo value on line 29.

1
2/******************************************************************
3  * SparkFun Inventor"s Kit
4 * Example sketch 11
5 * 
6 * BUZZER
7 * with  lots of help from the Arduino community,
8 * and amended by J. Hadley to include  an extra octave and semitones.
9 * Further amended August 2020 to allow the playing  of a song to be
10 * interrupted by a sensor input. When the sensor value meets  the
11 * condition, the song will cease playing.
12 * 
13 * This sketch uses  the buzzer to play songs.
14 * The Arduino"s tone() command will play notes of  a given frequency.
15 * 
16 * This sketch was written by SparkFun Electronics,
17  * (This sketch was originally developed by D. Cuartielles for K3)
18 * This code  is completely free for any use.
19 * Visit http://learn.sparkfun.com/products/2  for SIK information.
20 * Visit http://www.arduino.cc to learn about the Arduino.
21  * 
22 * Version 2.0 6/2012 MDG
23 * Version 2.1 9/2014 BCH
24 *****************************************************************/
25
26
27const  int SensorPin = A4;   // switch to use a different analog sensor
28int sensorThreshold  = 500;  // what sensor value will stop the song
29const int buzzerPin = 3;    //  connect the buzzer to pin 3 (Thinkershield buzzer pin)
30int tempo = 270;            //  The tempo is how fast to play the song (beats per minute).
31const int songLength  = 19;  // sets the number of notes of the song
32
33// Notes is an array of text  characters corresponding to the notes
34// in your song. A space represents a rest  (no tone). Each note or rest must be separated by a comma
35// with no comma after  the last note.
36
37// It"s important that you use single quotes for single letters  like "b", "g" and the rest ' ', and
38// that you use double quotes for notes  requiring multiple letters like "g2" (which is the g in the octave above)
39//  and "f#" (which is the sharp - a semitone above "f") in the lower octave. Your  code may compile if these are
40// incorrect but those notes will not play. It  is a quirky part of the Arduino coding language in this IDE.
41// In Tinkercad,  it works differently and all notes should be enclosed in double quotes.
42
43char*  notes[songLength] = {
44  ' ', 
45  "f#", "g#", 'b', 'b', ' ', 
46  "d2#",  "f2#", "g2#", "g2#", ' ', 
47  "g2#", "f2#", "f2#", "e2", ' ', 
48  "e2", "d2#", "d2#"}; 
49
50// beats[] is an array of values for each note.  A "1" represents a quarter-note, 
51// "2" a half-note, and "4" a full-note.
52//  Don"t forget that the rests (spaces) need a length as well.
53
54int beats[songLength]  = {
55  2, 
56  1, 1, 2, 3, 2, 
57  1, 1, 2, 3, 2, 
58  1.5, 0.5, 1, 3.5, 2,  
59  1.5, 1, 3.5};
60
61void setup() 
62{
63  pinMode(buzzerPin, OUTPUT);  //  sets the  buzzer pin as an OUTPUT
64  pinMode(SensorPin, INPUT);
65  //Serial.begin(9600);
66}
67
68void  loop() 
69{
70  int i, duration; 
71  bool keepPlaying = true;
72  int value;
73  
74  i=0;
75  value = analogRead(SensorPin);
76  //Serial.println(value);
77  keepPlaying = (value > sensorThreshold);
78  
79  while ((i < songLength) &&  keepPlaying)
80  {
81    //Serial.println("playing");
82    duration = beats[i]  * tempo;  // length of note/rest in ms
83
84    if (notes[i] == ' '){          //  is this a rest? 
85      delay(duration);            // then pause for a moment
86      //Serial.println("pause");
87    }
88    else                          //  otherwise, play the note
89    {
90      tone(buzzerPin, frequency(notes[i]),  duration);
91      delay(duration);            // wait for tone to finish
92      //Serial.println("note  is " + String(notes[i]));
93    }
94
95    delay(tempo/20);              //  brief pause between notes
96    value = analogRead(SensorPin);
97    keepPlaying  = (value > sensorThreshold);
98    //Serial.println(value);
99    i = i+1;  
100  }
101
102  //while(true){
103  // We only want to play the song once, so we pause  forever
104  //}
105  
106  /* If you'd like your song to play once only, uncomment  the 3 lines that make up the 
107     while(true)statement above. When commented  out, the song will play repeatedly. */
108}
109
110//-------------------------------------------------------------------------------------------------------------------------
111int  frequency(char* note) 
112{
113  int i;
114  const int numNotes = 25;  // number  of notes we"re storing - includes the semitones over 2 octaves starting at middle  C
115  char* names[numNotes] = { 
116    'c', "c#", 'd', "d#",'e', 'f', "f#",  'g', "g#", 'a', "a#", 'b', "c2", "c2#", "d2", "d2#", "e2", "f2",  "f2#", "g2", "g2#", "a2", "a2#", "b2", "c3"    };
117  int frequencies[numNotes]  = {
118    262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494, 523, 554,  587, 622, 659, 698, 740, 784, 831, 880, 932, 988, 1047    };
119
120  // Now we"ll  search through the letters in the array, and if
121  // we find it, we"ll return  the frequency for that note.
122
123  for (i = 0; i < numNotes; i++)  // Step through  the notes
124  {
125    if (names[i] == note)         // Is this the one?
126    {
127      return(frequencies[i]);     // Yes! Return the frequency and exit function.
128    }
129  }
130  return(0);  // We looked through everything and didn't find it,
131  // but we still need to return a value, so return 0.
132}
133

/******************************************************************
  * SparkFun Inventor"s Kit
 * Example sketch 11
 * 
 * BUZZER
 * with  lots of help from the Arduino community,
 * and amended by J. Hadley to include  an extra octave and semitones.
 * Further amended August 2020 to allow the playing  of a song to be
 * interrupted by a sensor input. When the sensor value meets  the
 * condition, the song will cease playing.
 * 
 * This sketch uses  the buzzer to play songs.
 * The Arduino"s tone() command will play notes of  a given frequency.
 * 
 * This sketch was written by SparkFun Electronics,
  * (This sketch was originally developed by D. Cuartielles for K3)
 * This code  is completely free for any use.
 * Visit http://learn.sparkfun.com/products/2  for SIK information.
 * Visit http://www.arduino.cc to learn about the Arduino.
  * 
 * Version 2.0 6/2012 MDG
 * Version 2.1 9/2014 BCH
 *****************************************************************/


const  int SensorPin = A4;   // switch to use a different analog sensor
int sensorThreshold  = 500;  // what sensor value will stop the song
const int buzzerPin = 3;    //  connect the buzzer to pin 3 (Thinkershield buzzer pin)
int tempo = 270;            //  The tempo is how fast to play the song (beats per minute).
const int songLength  = 19;  // sets the number of notes of the song

// Notes is an array of text  characters corresponding to the notes
// in your song. A space represents a rest  (no tone). Each note or rest must be separated by a comma
// with no comma after  the last note.

// It"s important that you use single quotes for single letters  like "b", "g" and the rest ' ', and
// that you use double quotes for notes  requiring multiple letters like "g2" (which is the g in the octave above)
//  and "f#" (which is the sharp - a semitone above "f") in the lower octave. Your  code may compile if these are
// incorrect but those notes will not play. It  is a quirky part of the Arduino coding language in this IDE.
// In Tinkercad,  it works differently and all notes should be enclosed in double quotes.

char*  notes[songLength] = {
  ' ', 
  "f#", "g#", 'b', 'b', ' ', 
  "d2#",  "f2#", "g2#", "g2#", ' ', 
  "g2#", "f2#", "f2#", "e2", ' ', 
  "e2", "d2#", "d2#"}; 

// beats[] is an array of values for each note.  A "1" represents a quarter-note, 
// "2" a half-note, and "4" a full-note.
//  Don"t forget that the rests (spaces) need a length as well.

int beats[songLength]  = {
  2, 
  1, 1, 2, 3, 2, 
  1, 1, 2, 3, 2, 
  1.5, 0.5, 1, 3.5, 2,  
  1.5, 1, 3.5};

void setup() 
{
  pinMode(buzzerPin, OUTPUT);  //  sets the  buzzer pin as an OUTPUT
  pinMode(SensorPin, INPUT);
  //Serial.begin(9600);
}

void  loop() 
{
  int i, duration; 
  bool keepPlaying = true;
  int value;
  
  i=0;
  value = analogRead(SensorPin);
  //Serial.println(value);
  keepPlaying = (value > sensorThreshold);
  
  while ((i < songLength) &&  keepPlaying)
  {
    //Serial.println("playing");
    duration = beats[i]  * tempo;  // length of note/rest in ms

    if (notes[i] == ' '){          //  is this a rest? 
      delay(duration);            // then pause for a moment
      //Serial.println("pause");
    }
    else                          //  otherwise, play the note
    {
      tone(buzzerPin, frequency(notes[i]),  duration);
      delay(duration);            // wait for tone to finish
      //Serial.println("note  is " + String(notes[i]));
    }

    delay(tempo/20);              //  brief pause between notes
    value = analogRead(SensorPin);
    keepPlaying  = (value > sensorThreshold);
    //Serial.println(value);
    i = i+1;  
  }

  //while(true){
  // We only want to play the song once, so we pause  forever
  //}
  
  /* If you'd like your song to play once only, uncomment  the 3 lines that make up the 
     while(true)statement above. When commented  out, the song will play repeatedly. */
}

//-------------------------------------------------------------------------------------------------------------------------
int  frequency(char* note) 
{
  int i;
  const int numNotes = 25;  // number  of notes we"re storing - includes the semitones over 2 octaves starting at middle  C
  char* names[numNotes] = { 
    'c', "c#", 'd', "d#",'e', 'f', "f#",  'g', "g#", 'a', "a#", 'b', "c2", "c2#", "d2", "d2#", "e2", "f2",  "f2#", "g2", "g2#", "a2", "a2#", "b2", "c3"    };
  int frequencies[numNotes]  = {
    262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494, 523, 554,  587, 622, 659, 698, 740, 784, 831, 880, 932, 988, 1047    };

  // Now we"ll  search through the letters in the array, and if
  // we find it, we"ll return  the frequency for that note.

  for (i = 0; i < numNotes; i++)  // Step through  the notes
  {
    if (names[i] == note)         // Is this the one?
    {
      return(frequencies[i]);     // Yes! Return the frequency and exit function.
    }
  }
  return(0);  // We looked through everything and didn't find it,
  // but we still need to return a value, so return 0.
}

LightSensingBuzzer

arduino

1
2/******************************************************************
3
4  * SparkFun Inventor"s Kit
5 * Example sketch 11
6 * 
7 * BUZZER
8 * with
9  lots of help from the Arduino community,
10 * and amended by J. Hadley to include
11  an extra octave and semitones.
12 * Further amended August 2020 to allow the playing
13  of a song to be
14 * interrupted by a sensor input. When the sensor value meets
15  the
16 * condition, the song will cease playing.
17 * 
18 * This sketch uses
19  the buzzer to play songs.
20 * The Arduino"s tone() command will play notes of
21  a given frequency.
22 * 
23 * This sketch was written by SparkFun Electronics,
24
25  * (This sketch was originally developed by D. Cuartielles for K3)
26 * This code
27  is completely free for any use.
28 * Visit http://learn.sparkfun.com/products/2
29  for SIK information.
30 * Visit http://www.arduino.cc to learn about the Arduino.
31
32  * 
33 * Version 2.0 6/2012 MDG
34 * Version 2.1 9/2014 BCH
35 *****************************************************************/
36
37
38const
39  int SensorPin = A4;   // switch to use a different analog sensor
40int sensorThreshold
41  = 500;  // what sensor value will stop the song
42const int buzzerPin = 3;    //
43  connect the buzzer to pin 3 (Thinkershield buzzer pin)
44int tempo = 270;            //
45  The tempo is how fast to play the song (beats per minute).
46const int songLength
47  = 19;  // sets the number of notes of the song
48
49// Notes is an array of text
50  characters corresponding to the notes
51// in your song. A space represents a rest
52  (no tone). Each note or rest must be separated by a comma
53// with no comma after
54  the last note.
55
56// It"s important that you use single quotes for single letters
57  like "b", "g" and the rest ' ', and
58// that you use double quotes for notes
59  requiring multiple letters like "g2" (which is the g in the octave above)
60//
61  and "f#" (which is the sharp - a semitone above "f") in the lower octave. Your
62  code may compile if these are
63// incorrect but those notes will not play. It
64  is a quirky part of the Arduino coding language in this IDE.
65// In Tinkercad,
66  it works differently and all notes should be enclosed in double quotes.
67
68char*
69  notes[songLength] = {
70  ' ', 
71  "f#", "g#", 'b', 'b', ' ', 
72  "d2#",
73  "f2#", "g2#", "g2#", ' ', 
74  "g2#", "f2#", "f2#", "e2", ' ', 
75
76  "e2", "d2#", "d2#"}; 
77
78// beats[] is an array of values for each note.
79  A "1" represents a quarter-note, 
80// "2" a half-note, and "4" a full-note.
81//
82  Don"t forget that the rests (spaces) need a length as well.
83
84int beats[songLength]
85  = {
86  2, 
87  1, 1, 2, 3, 2, 
88  1, 1, 2, 3, 2, 
89  1.5, 0.5, 1, 3.5, 2,
90  
91  1.5, 1, 3.5};
92
93void setup() 
94{
95  pinMode(buzzerPin, OUTPUT);  //
96  sets the  buzzer pin as an OUTPUT
97  pinMode(SensorPin, INPUT);
98  //Serial.begin(9600);
99}
100
101void
102  loop() 
103{
104  int i, duration; 
105  bool keepPlaying = true;
106  int value;
107
108  
109  i=0;
110  value = analogRead(SensorPin);
111  //Serial.println(value);
112
113  keepPlaying = (value > sensorThreshold);
114  
115  while ((i < songLength) &&
116  keepPlaying)
117  {
118    //Serial.println("playing");
119    duration = beats[i]
120  * tempo;  // length of note/rest in ms
121
122    if (notes[i] == ' '){          //
123  is this a rest? 
124      delay(duration);            // then pause for a moment
125
126      //Serial.println("pause");
127    }
128    else                          //
129  otherwise, play the note
130    {
131      tone(buzzerPin, frequency(notes[i]),
132  duration);
133      delay(duration);            // wait for tone to finish
134      //Serial.println("note
135  is " + String(notes[i]));
136    }
137
138    delay(tempo/20);              //
139  brief pause between notes
140    value = analogRead(SensorPin);
141    keepPlaying
142  = (value > sensorThreshold);
143    //Serial.println(value);
144    i = i+1;  
145
146  }
147
148  //while(true){
149  // We only want to play the song once, so we pause
150  forever
151  //}
152  
153  /* If you'd like your song to play once only, uncomment
154  the 3 lines that make up the 
155     while(true)statement above. When commented
156  out, the song will play repeatedly. */
157}
158
159//-------------------------------------------------------------------------------------------------------------------------
160int
161  frequency(char* note) 
162{
163  int i;
164  const int numNotes = 25;  // number
165  of notes we"re storing - includes the semitones over 2 octaves starting at middle
166  C
167  char* names[numNotes] = { 
168    'c', "c#", 'd', "d#",'e', 'f', "f#",
169  'g', "g#", 'a', "a#", 'b', "c2", "c2#", "d2", "d2#", "e2", "f2",
170  "f2#", "g2", "g2#", "a2", "a2#", "b2", "c3"    };
171  int frequencies[numNotes]
172  = {
173    262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494, 523, 554,
174  587, 622, 659, 698, 740, 784, 831, 880, 932, 988, 1047    };
175
176  // Now we"ll
177  search through the letters in the array, and if
178  // we find it, we"ll return
179  the frequency for that note.
180
181  for (i = 0; i < numNotes; i++)  // Step through
182  the notes
183  {
184    if (names[i] == note)         // Is this the one?
185    {
186
187      return(frequencies[i]);     // Yes! Return the frequency and exit function.
188
189    }
190  }
191  return(0);  // We looked through everything and didn't find it,
192
193  // but we still need to return a value, so return 0.
194}
195

/******************************************************************

  * SparkFun Inventor"s Kit
 * Example sketch 11
 * 
 * BUZZER
 * with
  lots of help from the Arduino community,
 * and amended by J. Hadley to include
  an extra octave and semitones.
 * Further amended August 2020 to allow the playing
  of a song to be
 * interrupted by a sensor input. When the sensor value meets
  the
 * condition, the song will cease playing.
 * 
 * This sketch uses
  the buzzer to play songs.
 * The Arduino"s tone() command will play notes of
  a given frequency.
 * 
 * This sketch was written by SparkFun Electronics,

  * (This sketch was originally developed by D. Cuartielles for K3)
 * This code
  is completely free for any use.
 * Visit http://learn.sparkfun.com/products/2
  for SIK information.
 * Visit http://www.arduino.cc to learn about the Arduino.

  * 
 * Version 2.0 6/2012 MDG
 * Version 2.1 9/2014 BCH
 *****************************************************************/


const
  int SensorPin = A4;   // switch to use a different analog sensor
int sensorThreshold
  = 500;  // what sensor value will stop the song
const int buzzerPin = 3;    //
  connect the buzzer to pin 3 (Thinkershield buzzer pin)
int tempo = 270;            //
  The tempo is how fast to play the song (beats per minute).
const int songLength
  = 19;  // sets the number of notes of the song

// Notes is an array of text
  characters corresponding to the notes
// in your song. A space represents a rest
  (no tone). Each note or rest must be separated by a comma
// with no comma after
  the last note.

// It"s important that you use single quotes for single letters
  like "b", "g" and the rest ' ', and
// that you use double quotes for notes
  requiring multiple letters like "g2" (which is the g in the octave above)
//
  and "f#" (which is the sharp - a semitone above "f") in the lower octave. Your
  code may compile if these are
// incorrect but those notes will not play. It
  is a quirky part of the Arduino coding language in this IDE.
// In Tinkercad,
  it works differently and all notes should be enclosed in double quotes.

char*
  notes[songLength] = {
  ' ', 
  "f#", "g#", 'b', 'b', ' ', 
  "d2#",
  "f2#", "g2#", "g2#", ' ', 
  "g2#", "f2#", "f2#", "e2", ' ', 

  "e2", "d2#", "d2#"}; 

// beats[] is an array of values for each note.
  A "1" represents a quarter-note, 
// "2" a half-note, and "4" a full-note.
//
  Don"t forget that the rests (spaces) need a length as well.

int beats[songLength]
  = {
  2, 
  1, 1, 2, 3, 2, 
  1, 1, 2, 3, 2, 
  1.5, 0.5, 1, 3.5, 2,
  
  1.5, 1, 3.5};

void setup() 
{
  pinMode(buzzerPin, OUTPUT);  //
  sets the  buzzer pin as an OUTPUT
  pinMode(SensorPin, INPUT);
  //Serial.begin(9600);
}

void
  loop() 
{
  int i, duration; 
  bool keepPlaying = true;
  int value;

  
  i=0;
  value = analogRead(SensorPin);
  //Serial.println(value);

  keepPlaying = (value > sensorThreshold);
  
  while ((i < songLength) &&
  keepPlaying)
  {
    //Serial.println("playing");
    duration = beats[i]
  * tempo;  // length of note/rest in ms

    if (notes[i] == ' '){          //
  is this a rest? 
      delay(duration);            // then pause for a moment

      //Serial.println("pause");
    }
    else                          //
  otherwise, play the note
    {
      tone(buzzerPin, frequency(notes[i]),
  duration);
      delay(duration);            // wait for tone to finish
      //Serial.println("note
  is " + String(notes[i]));
    }

    delay(tempo/20);              //
  brief pause between notes
    value = analogRead(SensorPin);
    keepPlaying
  = (value > sensorThreshold);
    //Serial.println(value);
    i = i+1;  

  }

  //while(true){
  // We only want to play the song once, so we pause
  forever
  //}
  
  /* If you'd like your song to play once only, uncomment
  the 3 lines that make up the 
     while(true)statement above. When commented
  out, the song will play repeatedly. */
}

//-------------------------------------------------------------------------------------------------------------------------
int
  frequency(char* note) 
{
  int i;
  const int numNotes = 25;  // number
  of notes we"re storing - includes the semitones over 2 octaves starting at middle
  C
  char* names[numNotes] = { 
    'c', "c#", 'd', "d#",'e', 'f', "f#",
  'g', "g#", 'a', "a#", 'b', "c2", "c2#", "d2", "d2#", "e2", "f2",
  "f2#", "g2", "g2#", "a2", "a2#", "b2", "c3"    };
  int frequencies[numNotes]
  = {
    262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494, 523, 554,
  587, 622, 659, 698, 740, 784, 831, 880, 932, 988, 1047    };

  // Now we"ll
  search through the letters in the array, and if
  // we find it, we"ll return
  the frequency for that note.

  for (i = 0; i < numNotes; i++)  // Step through
  the notes
  {
    if (names[i] == note)         // Is this the one?
    {

      return(frequencies[i]);     // Yes! Return the frequency and exit function.

    }
  }
  return(0);  // We looked through everything and didn't find it,

  // but we still need to return a value, so return 0.
}

Downloadable files

Musical Treasure Box Circuit

This circuit has an LDR to sense the light level in the environment and a buzzer to play a tune. The potentiometer is included to encourage others to consider doing an extension of the project but is not used in this project. It can be left out if desired by removing the potentiometer and the three wires connected to it.

Musical Treasure Box Circuit

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