#include "pitches.h" int button_C = 2; int button_D = 3; int button_E = 4; int button_F = 5; int button_G = 6; int button_A = 7; int button_B = 8; int button_Cup = 9; int speaker = 13; int buttonstate_C = 0; int buttonstate_D = 0; int buttonstate_E = 0; int buttonstate_F = 0; int buttonstate_G = 0; int buttonstate_A = 0; int buttonstate_B = 0; int buttonstate_Cup = 0; //NOTES 'c' ,'d', 'e', 'f' , 'g', 'a', 'b', 'C' int tones[] = { 262, 294, 330, 349, 392, 440, 494, 523 }; //freq int Cur_tone = 0; void setup() { pinMode(button_C, INPUT); pinMode(button_D, INPUT); pinMode(button_E, INPUT); pinMode(button_F, INPUT); pinMode(button_G, INPUT); pinMode(button_A, INPUT); pinMode(button_B, INPUT); pinMode(button_Cup, INPUT); pinMode(speaker, OUTPUT); } void loop() { buttonstate_C = digitalRead(button_C); buttonstate_D = digitalRead(button_D); buttonstate_E = digitalRead(button_E); buttonstate_F = digitalRead(button_F); buttonstate_G = digitalRead(button_G); buttonstate_A = digitalRead(button_A); buttonstate_B = digitalRead(button_B); buttonstate_Cup = digitalRead(button_Cup); if((buttonstate_C == HIGH) || (buttonstate_E == HIGH) || (buttonstate_G == HIGH) || (buttonstate_D == HIGH) || (buttonstate_F == HIGH) || (buttonstate_A == HIGH) || (buttonstate_B == HIGH) || (buttonstate_Cup == HIGH) ) { if (buttonstate_C == HIGH) { Cur_tone = tones[0]; } if (buttonstate_E == HIGH) { Cur_tone = tones[1]; } if (buttonstate_G == HIGH) { Cur_tone = tones[2]; } if (buttonstate_D == HIGH) { Cur_tone = tones[3]; } if (buttonstate_F == HIGH) { Cur_tone = tones[4]; } if (buttonstate_A == HIGH) { Cur_tone = tones[5]; } if (buttonstate_B == HIGH) { Cur_tone = tones[6]; } if (buttonstate_Cup == HIGH) { Cur_tone = tones[7]; } digitalWrite(speaker, HIGH); delayMicroseconds(Cur_tone); digitalWrite(speaker, LOW); delayMicroseconds(Cur_tone); } else //in case no button is pressed , close the piezo { digitalWrite(speaker, LOW); } }