Constant Four Note Piano Variables

Code

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/* Use variables to determine the notes on a four-note piano */ int lowNote = 200; //variable named 'lowNote' that is an integer (whole number, no decimals), with a value of 200 void setup(){ pinMode(A5,OUTPUT); //speaker pinMode(8,INPUT_PULLUP); //button pinMode(9,INPUT_PULLUP); //button pinMode(10,INPUT_PULLUP); //button pinMode(11,INPUT_PULLUP); //button } void loop(){ if(digitalRead(8)==LOW){ //if button 8 is pressed... tone(A5,lowNote); //play the hertz value that is equal to the 'lowNote' variable } else if(digitalRead(9)==LOW){ //if button 9 is pressed... tone(A5,lowNote*2); //play DOUBLE the hertz value that is equal to lowNote } else if(digitalRead(10)==LOW){ //if button 10 is pressed... tone(A5,lowNote*3); //play TRIPLE the hertz value equal to lowNote } else if(digitalRead(11)==LOW){ //if button 11 is pressed... tone(A5,lowNote*4); //play QUADRUPLE the hertz value equal to lowNote } else{ //otherwise, if no buttons are pressed... noTone(A5); //turn off the speaker } } // (c) 2021 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense
 

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Video Notes for Code Lab Users:

  • You are using a button on port 8 instead of 2, 9 instead of 5, and 10 instead of 8 as the video mentions. Button 11 is unchanged!

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Quiz

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




2. Which syntax ends a single code command?