아두이노 피아노
void setup() { pinMode(5, OUTPUT); pinMode(6, OUTPUT); pinMode(7, OUTPUT); pinMode(8, OUTPUT); pinMode(9, OUTPUT); pinMode(10, OUTPUT); pinMode(11, OUTPUT); pinMode(12, OUTPUT); pinMode(13, OUTPUT); } void loop() { if(digitalRead(13) == HIGH){ tone(5,523.3); } else if(digitalRead(12) == HIGH){ tone(5, 493.3); } else if(digitalRead(11) == HIGH){ tone(5, 440.0); } else if(digita..