Four Note Piano

Code

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/* Create a 4 note piano where each of the 4 buttons plays a different tone */ void setup(){ pinMode(8,INPUT_PULLUP);//button pinMode(9,INPUT_PULLUP);//button pinMode(10,INPUT_PULLUP);//button pinMode(11,INPUT_PULLUP);//button pinMode(A5,OUTPUT); //speaker } void loop(){ if(digitalRead(8)==LOW){ //if button 8 is pressed tone(A5,500); //play a tone of 500 hertz on the speaker } else if(digitalRead(9)==LOW){ //otherwise if button 9 is pressed tone(A5,700); //play a tone of 700 hertz } else if(digitalRead(10)==LOW){ //otherwise if button 10 is pressed tone(A5,900); //play a tone of 900 hertz } else if(digitalRead(11)==LOW){ //otherwise if button 11 is pressed tone(A5,1100); //play a tone of 1100 hertz } else{ //otherwise if none of the if-else if statements are true noTone(A5); //stop any tones playing on the speaker } } // (c) 2021 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense
 

Walkthrough Video

Watch the video for a line-by-line explanation of how the example program works. Then you'll be ready to make some changes of your own!

Video Notes for Code Lab Users:

  • You will use a button on port 8 instead of 2, port 9 instead of 6, port 10 instead of 9, and port 11 instead of 12.

Challenges

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Concepts

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Quiz

If you're having trouble, try to run an experimental program or look at the example code to help you find the answer.

1. Which syntax ends the entire 'void loop' function?




2. Which syntax ends a single code command?