Arduino Project: Piezo Piano

Beginner

15 Min

32,20

In this project I will show you how to make an Arduino piezo piano yourself.

With this simple and cheap project you can demonstrate very quickly how a keypad works on the Arduino. In this project we use an Arduino UNO, a breadboard and a digital 4x4 keypad.

Building and Wiring

Now we're going to put the project together.

We start by connecting the keypad to the Arduino. You do this in a specific order: The first 4 pins go into digital ports 4 to 7, the last 4 ports go into digital 0 to 3. You connect these using the jumpers, directly into the UNO.

After you have connected the keypad you can place the buzzer on the breadboard. On the Buzzer there is a plus, you loop that via the breadboard and a jumper wire to port 11 on the Arduino. The minus you connect to a random GND port on the UNO.
See all this also via the attached Fritzing.

Programming

/*Elektronicavoorjou.nl Project Piezo piano

Benodigdheden

Arduino Uno

10 M/M Jumper wires

1 Breadboard

1 Piezo buzzer

4*4 Keypad*/

 

#include ”Keypad.h”

#include “pitches.h”

#define GND 12

const byte ROWS = 4; //Aantal rijen

const byte COLS = 4; //Aantal kolommen

const int SPEAKER=11;

//defineer symbolen op keypad

char hexaKeys[ROWS][COLS] = {

{‘1′,’2′,’3′,’A’},

{‘4′,’5′,’6′,’B’},

{‘7′,’8′,’9′,’C’},

{‘*’,’0′,’#’,’D’} };

byte rowPins[ROWS] = {3, 2, 8, 0}; //connect rij naar pinouts op keypad

byte colPins[COLS] = {7, 6, 5, 4}; //connect kolom naar pinouts op keypad

//initialize instance genaamd NewKeypad

Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

void setup()

{

Serial.begin(9600);

pinMode(GND,OUTPUT);

digitalWrite(GND,LOW);

}

void loop()

{

char customKey = customKeypad.getKey();

if (customKey==’0′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_C4,350);

}

if (customKey==’1′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_D4,350);

}

if (customKey==’2′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_E4,350);

}

if (customKey==’3′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_F4,350);

}

if (customKey==’4′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_G4,350);

}

if (customKey==’5′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_A4,350);

}

if (customKey==’6′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_B4,350);

}

if (customKey==’7′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_C5,350);

}

if (customKey==’8′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_D5,350);

}

if (customKey==’9′)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_E5,350);

}

if (customKey==’A’)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_F5,350);

}

if (customKey==’B’)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_G5,350);

}

if (customKey==’C’)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_A5,350);

}

if (customKey==’D’)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_B5,350);

}

if (customKey==’*’)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_C6,350);

}

if (customKey==’#’)

{

Serial.println(customKey);

tone(SPEAKER,NOTE_D6,350);

}

}

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

* Public Constants

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

 

#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

This code works but needs some adjustments to function ideally.
We leave this up to you because then you will actually be doing the programming yourself!

Arduino Project: Piezo Piano

Building and Wiring

Programming

Required products