Mix the Colors on Two RGB LEDs

Use the ‘Parts List’ image along with the component cards in your box to correctly plug in the electronic hardware to your Maker Board. The colorful dots next to the legs of the components match up to the ports where that leg should go on Maker Board’s ports.

Code

The code in the editor below is ready to run! Plug in the electronic components just like the Parts List card above, connect Maker Board to your computer's USB port with the cable, and hit 'Upload Your Code!'. Tinker with the code and change something! If you get stuck, you can hit the 'Restore' button to make the code go back to the working example.

// Turn on and off the colors of two RGB LEDs at the same time void setup(){ pinMode(2,OUTPUT); //One leg of the first RGB LED light pinMode(3,OUTPUT); //One leg of the first RGB LED light pinMode(4,OUTPUT); //One leg of the first RGB LED light pinMode(11,OUTPUT); //One leg of the second RGB LED light pinMode(12,OUTPUT); //One leg of the second RGB LED light pinMode(13,OUTPUT); //One leg of the second RGB LED light } void loop(){ digitalWrite(2,HIGH); //Turn on LED 2 digitalWrite(13,HIGH); //Turn on LED 13 delay(1000); //Wait 1000 milliseconds (one second) digitalWrite(3,HIGH); //Turn on LED 3 digitalWrite(12,HIGH); //Turn on LED 12 delay(1000); //Wait 1000 milliseconds digitalWrite(4,HIGH); //Turn on LED 4 digitalWrite(11,HIGH); //Turn on LED 11 delay(1000); //Wait 1000 milliseconds digitalWrite(2,LOW); //Turn off LED 2 digitalWrite(13,LOW); //Turn off LED 13 delay(1000); //Wait 1000 milliseconds digitalWrite(3,LOW); //Turn off LED 4 digitalWrite(12,LOW); //Turn off LED 12 delay(1000); //Wait 1000 milliseconds digitalWrite(4,LOW); //Turn off LED 6 digitalWrite(11,LOW); //Turn off LED 11 delay(1000); //Wait 1000 milliseconds } //(c)2019 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!

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 delays in the void loop function - there are 6 of them! - to speed up or slow down how the colors mix.

On the multicolor LED using ports 2,3,4, which two ports are never on at the same time? Write some new functions or modify the example code so those two ports mix their colors.

Concepts

These are the new code concepts covered in this example program. To become a great coder, read through these concepts to learn new vocabulary.

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?

semicolon ;
parentheses )
closing curly brace }

2. Which syntax ends a single code command?

semicolon ;
closing curly brace }
period .

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