9_0 Fade Up LED

Fade Up LED

Code

The code in the editor below is ready to run! Plug Code Lab Mini 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.

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/* Fade up the tones on a speaker*/ void setup(){ pinMode(2,OUTPUT); //speaker } void loop(){ /*create a 'counter' variable starting at 40 and, as long as the variable is less than 1000, run the code between the curly braces, then increase the value of the 'i' variable by 1 */ for(int i = 40; i < 1000; i++){ tone(2,i); //use the value of 'i' to determine the tone playing on the speaker delay(10); //wait 10 milliseconds (0.01 seconds) before running the 'for' loop again } //Once the 'for' loop has ended, the void loop will start over, resetting the i variable and running the 'for' loop again } // (c) 2023 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense

 

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Compile errors:

Serial port monitor: Input: Send Close

 

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 condition in the ‘for’ loop so that the tone stops rising somewhere before 1000 hertz.

Change the delay to affect how the tone changes.

Change the starting value in the ‘for’ loop so the tone starts playing with a hertz value that is higher than 40