9_6 LED Pixels Light in Sequence

LED Pixels Light in Sequence

Code

The code in the editor below is ready to run! Plug Code Lab Mini in to your computer's USB port, make sure that your Code Lab Mini Rainbow Add-On (sold separately) is attached, 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.

If you haven't set up your Code Lab Mini Rainbow Add-On yet, visit Chapter 0 to watch a video showing you how to do that.

Restore 12 14 18 24 30

Monitor Upload Your Code!

// Turn on each pixel of Code Lab Mini's LED pixels in sequence with a for loop #include "LEDStrip.h" //The LEDStrip.h library gives your code access to special functions exclusive to the LED Pixels LEDStrip rainbow = LEDStrip(15, 13, A5); //Set up the pixels by defining how many pixels (15) and where it's connected to Code Lab Mini (always 13 and A5) void setup() {} void loop() { /* Create a variable i that has a starting value of 0 and, as long as i is less than 15, run the code between the curly braces, then increase the value of the 'i' variable by 1*/ for(int i = 0; i < 15; i++){ rainbow.setPixel(i,200); //Use the variable 'i' to set which LED pixel is being lit up rainbow.draw(); //send the setPixel data to the rainbow delay(100); //delay 100 milliseconds (0.1 second) before running the 'for' loop again } rainbow.clear(); //Once the 'for' loop has completed, clear off the rainbow rainbow.draw(); //send the 'clear' command to the rainbow } // (c) 2023 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense

 

It looks like your computer isn't set up to code yet. Setup My Computer

Success!

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!

LED Pixel Color Spectrum

Use this spectrum to estimate the color values you'll need for your 'setPixel' arguments to achieve your favorite color!

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 that affects how fast the ‘for’ loop can run.

Change the color of the pixels by changing the second argument in the setPixel function.

Reverse the way the strip lights up by changing the ‘for’ loop to something like this:
for(int i = 14; i>=0; i--)
notice that the change from i++ to i-- will change the direction of the pixels.