Introduction: Arduino Piano With Piezoelectric Sensors

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Greetings from Fablab Jubail,Saudi arabia. We came in Peace

This instructable will cover how to make an Arduino based piano made by connecting 5 of piezoelectric pressure sensors to the Arduino and a simple sound speaker, each piezo sensor is programmed to send a specified musical tone the speaker is going recognize and turn on after you press the piezoelectric sensor.

Step 1: Components

  • 6 Piezoelectric transducer
  • Sound speaker
  • Breadboard
  • Arduino Uno
  • Jumpers
  • 6 Resistors

Step 2: Connection

  • Each Piezo Transducer red wire should be connected through a resistor to GND and black wire is connected to Pin here we used A0, A1, A2, A3, A4, A5
  • Sound speaker red wire should be connected to Pin 8 and black to GND

Step 3:

First
you need to open a New Tab and name the file " pitches.h " then insert the tones

#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

After that get back to your sketch and add your code

#include "pitches.h"
int analogpin[6]={A0,A1,A2,A3,A4,A5};
int buzpin=8;
int threshold=20;
void setup()
{
Serial.begin(9600);
pinMode(8,OUTPUT);
}
void loop()
{
if(analogRead(analogpin[0])>threshold)
{
Serial.println("A0");
tone(8, NOTE_B4,1000/4);
}
if (analogRead(analogpin[1])>threshold)
{
Serial.println("A1");
tone(8, NOTE_D4,1000/4);
digitalWrite(8,HIGH);
}
if (analogRead(analogpin[2])>threshold)
{
Serial.println("A2");
tone(8, NOTE_C4,1000/4);
}
if (analogRead(analogpin[3])>threshold)
{
Serial.println("A3");
tone(8, NOTE_G4,1000/4);
}
if (analogRead(analogpin[4])>threshold)
{
Serial.println("A4");
tone(8, NOTE_G3,1000/4);
}
if (analogRead(analogpin[5])>threshold)
{
Serial.println("A5");
tone(8, NOTE_D3,1000/4);
}
}

Step 4: Conclusion

as defined in Wikipedia, A Piezo Sensors or A piezoelectric sensor is a device that uses the piezoelectric
effect, to measure changes in pressure, acceleration, temperature, strain, or force by converting them to an electrical charge. The prefix piezo- is Greek for 'press' or 'squeeze'.

so we are using that to detect when you press each pad and so the Arduino would decide which tone to play , you can play around with this idea to develop a full blown organ or do something else more productive if you are into that kind of stuff!!

Peace out Makers