Beep Random Tones

Code

The code in the editor below is ready to run! Plug your Code Lab in to your computer's USB port with the cable and hit 'Upload Your Code!' to see what it does. Change something in the code, like a delay or pin number. Try to add something new to the program - it's yours to tinker with! You can always press the 'Restore' button to return the code to the working example.

/* Beep random tones on the speaker */ 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(1000); // delay 1000 milliseconds (1 second) with the tone playing } // (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 challenges? 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 delay between the random tones that beep on the speaker. What happens when you make the delay really, really small?

Change the range of tones the random function can ‘choose from’ for the tone it plays each loop. You can make the tone as large or as small as you want.

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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