Combine Random Tones and Random Delays

Code

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/* Beep random tones on the speaker with a random delay between each tone */ void setup(){ pinMode(A5,OUTPUT); //Speaker } void loop(){ tone(A5,random(40,1200)); //play a random hertz value from 40 - 1199 on the speaker delay(random(50,2000)); // random delay from 50-1999 milliseconds between each tone } // (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!

Challenges

Can you complete the challenge? Change the code in your code editor above. Upload your code to see the effect when you're finished. Complete a challenge? Check it off the list!

Change the range of random values the tone function can use.

Change the range of random values that the delay function can use.

Add a noTone function with A5 as the argument and another random delay function so the tone will be ‘off’ for a random period of time.

Concepts

These are the new code concepts covered in this example program. To become a great coder, read through these concepts to learn new vocabulary.

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?

semicolon ;
parentheses )
closing curly brace }

2. Which syntax ends a single code command?

semicolon ;
closing curly brace }
period .

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