A musical instrument is a device created or adapted for the purpose of making musical sounds. Arduino Code void setup() { // set a pins for buzzers output pinMode(13, OUTPUT); pinMode(12, OUTPUT); pinMode(11, OUTPUT); } void loop() { buzz(13, 440, 20); // buzzer pin, freq, milliseconds delay(100); buzz(11, 500, 10); // buzzer pin, freq, milliseconds delay(100); buzz(12, 660, 10); // buzzer pin, freq, milliseconds delay(100); } void buzz(int targetPin, long frequency, long length) { long delayValue = 1000000/frequency/2; long numCycles = frequency * length/ 1000; for (long i=0; i buzzer arduino breadboard jumperkit (cables) to connect buzzers