/* Buggy: Make a beep on the speaker when you press button 12. Useful for manual Morse Code messages. */ void setup(){ pinMode(2,OUTPUT);//Speaker pinMode(12,INPUT_PULLUP); //Button } void loop(){ if(digitalRead(12)=LOW){ //if the button sends a LOW (pressed) signal tone(2,500); //play a tone of 500 hertz on pin 2 (speaker) } else{ //otherwise if no LOW signal from button noTone(2); //stop any tones that are playing on the speaker } } // (c) 2018 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense