4_8 Random Rainbow Colors

Random Rainbow Colors

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 Code Lab Mini's entire rainbow a random color */ #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 strip by defining how many pixels (15) and where it's connected to Code Lab Mini (always 13 and A5) void setup(){} void loop() { rainbow.setPixel(rainbow.ALL,random(0,300)); //Set the entire rainbowpan (rainbow.ALL) to a random color from 0-299 rainbow.draw(); //send the setPixel data to the rainbow to be displayed delay(1000); //Wait 1000 milliseconds before starting the 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!

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 random range that that the setPixel function can use to select a color value from.

Update the delay in the loop for faster or slower changes. Try to find the smallest delay where you can still see the colors change.

Replace the ‘rainbow.ALL’ with a random function so the program chooses a random pixel to change to a random color. This one is tough! If you need a hint, go to the next project and check it out.