9_4 Fade Up Motor Strength and Print the Variable

Fade Up Motor Strength and Print the Variable

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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Monitor Upload Your Code!

/* Fade up the strength of the motor and show the value of the i variable on the serial monitor*/ void setup(){ pinMode(3,OUTPUT); //motor Serial.begin(9600); } void loop(){ /*create a 'counter' variable starting at 0 and, as long as the variable is less than 256, run the code between the curly braces, then increase the value of the 'i' variable by 1 */ for(int i = 1; i < 256; i++){ analogWrite(3,i); //use the value of 'i' to determine the strength of the buzz on the motor Serial.println(i); //'print' the value of the 'i' variable on the serial monitor 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 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!

Add an 'if' statement inside the 'for' loop that will run only when i = 255. When that's true, print "max speed!" to the serial monitor. This is a tough challenge!

Add in the speaker to this program so that a tone fades up from 0 to 256 along with the motor strength.

Slow down the for loop by increasing the delay. This will also make the serial monitor much easier to read.