In this project, we will learn how to create a piano with a Raspberry Pi Pico. For this, we will use push buttons. Each push button will be associated with a specific note. We will also see how to modify the notes and add new ones.

Necessary Materials

Here’s the necessary equipment for the project:

  • A Raspberry Pi Pico

  • A Buzzer

  • 8 Push buttons

  • 8 Resistors (10 kΩ)

  • Jumper wires

#include "pitches.h"
#define SPEAKER_PIN 8

const uint8_t buttonPins[] = { 12, 11, 10, 9, 7, 6, 5, 4 };
const int buttonTones[] = {
  NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4,
  NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5 
};
const int numTones = sizeof(buttonPins) / sizeof(buttonPins[0]);

void setup() {
  for (uint8_t i = 0; i < numTones; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  pinMode(SPEAKER_PIN, OUTPUT);
}

void loop() {
  int pitch = 0;
  for (uint8_t i = 0; i < numTones; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      pitch = buttonTones[i];
    }
  }
  if (pitch) {
    tone(SPEAKER_PIN, pitch);
  } else {
    noTone(SPEAKER_PIN);
  }
  delay(10);
}