Turn Knob Controls LED Wingspan Color

Code

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/* Use the turn knob to control the color of the LED wingspan */ #include "LEDStrip.h" //The LEDStrip.h library gives your code access to special functions exclusive to the LED Pixels LEDStrip wings = LEDStrip(16, A4, A5); //Set up the pixels by defining how many pixels (16) and where it's connected to Buzz (always A4 and A5) void setup() { pinMode(A0,INPUT); //turn knob } void loop() { int color = analogRead(A0); //Create a variable color that is an integer (whole number) and uses the analogRead of A0 as its starting value color = map(color,0,1023,0,299); //Because analogRead has a range of 0-1024 and the color range is only 0-299, use 'map' //map matches up two ranges of values. Now, a 1023 analogReading equals color 299. A 0 reading equals 0. A 512 reading equals about 150 wings.setPixel(wings.ALL,color); //set all pixels to a color value equal to the variable wings.draw(); //send the setPixel data to the wings } // (c) 2023 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!

Buzz’s LED Color Spectrum

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


Graphic of the Map Function

This graphic represents how some values from the turn knob will be 'mapped' onto the pixel colors of the LED pixels.


Challenges

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Concepts

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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?




2. Which syntax ends a single code command?