/* Melody keyboard with Input Pullup Plays a pitch that changes based on 3 digital inputs This example demonstrates the use of pinMode(INPUT_PULLUP). It reads a digital input on pin 2 and prints the results to the serial monitor. There's also an extensive use of arrays. Thecircuit: * 3 buttons in pin 2,3,4 with no resistors * Piezo on digital pin 9 * Serial debug is available This example code is in the public domain Circuit: http://lab.piffa.net/schemi/piezo_2_keyboard_bb.png */ const int tasti[]= {4,3,2}; // La nota piu' a sx e' quella piu' bassa const int notes[] = {262, 392, 880}; // suona una prima, quinta, ottava in C4 const int piezo_pin = 9; // Carica un file di esempio con tutte le note // #include "pitches.h"; // int notes[] = {NOTE_C4, NOTE_G4,NOTE_C5 }; // suona una prima, quinta, ottava void setup() { //start serial connection Serial.begin(9600); Serial.println("Welcome"); //configure pin2/3/4 as an input and enable the internal pull-up resistor pinMode(tasti[0], INPUT_PULLUP); pinMode(tasti[1], INPUT_PULLUP); pinMode(tasti[2], INPUT_PULLUP); // Provare ad impostare i PIN con un // ciclo for pinMode(9, OUTPUT); } void loop() { for (int thisSensor = 0; thisSensor < 3; thisSensor++) { int sensorReading = digitalRead(tasti[thisSensor]); if (sensorReading == LOW) { Serial.print("Sensore: "); Serial.print(thisSensor); tone(piezo_pin, notes[thisSensor], 50); // Notes array is translated Serial.print("\t Nota: "); Serial.println(notes[thisSensor]); } //delay(2); // eventuale delay } } /* Domande 1. Modificare le note suonate utilizzando come riferimento il file pitches.h: suonare una prima, terza, quinta (C-E-G) 2. Includere il file pitches.h . Come si potrebbe scrivere una melodia da far s uonare autnomamente ad Arduino? */