Arduino Christmas Ornament

I’ve been wanting to tinker with RGB LED matrix for a while, and finally was able to do so earlier this month. It was fun programming some effects, game of life etc. on a 8×8 matrix using Arduino. Here is a Christmas ornament that I programmed. It shows a color changing star followed by scrolling text featuring Christmas related phrases.

The colors appear diffused in the video, but they are much more vivid in reality. I need to learn how to use my camera properly lol.


No custom circuitry is required. I ordered a color shield and couple of 8×8 matrix LEDs from China (ebay) and got this to work. Here is the parts list:

RGB LED 8*8 Matrix Driver Colors Shield For Arduino – $16.50
Matrix 8×8 RGB LED Full Color Dot Square Display 60x60mm Common Anode Arduino – $3.84
Arduino Uno –  I had this already.

Total cost – $20.34


Here is the sketch:

I ran into one limit when I tried to add more phrases. If I added more than 4, it kept crashing and random LEDs would light up. I then figured there was a 2K data limit on the character strings you could have in your sketch for Uno!

Wish you all a merry Christmas!

6 Responses

  1. Oleg
    Oleg September 23, 2015 at 7:17 pm |

    Can’t coompile with colorduino libraries that i have.
    Where yours right working colorduino library?

  2. Daniel Fernandes
    Daniel Fernandes November 30, 2017 at 9:54 am |

    Hi friend! (geekraj) You are showing the following: fatal error: fonts.c: No such file or directory.
    I created a folder called “fonts” inside the arduino libraries folder and put the file “fonts.c” inside; is correct? I am using the arduino IDE 1.6.5 and 1.8.5; I would like your help,
    Thank you

  3. Daniel Fernandes
    Daniel Fernandes December 1, 2017 at 7:47 am |

    The error in fonts.c looks like it has been resolved; is now displaying the following: ‘PixelRGB’ was not declared in this scope;
    Can you help me? I’m using Arduino 1.8.5
    Thank you

  4. Brid
    Brid December 8, 2017 at 3:13 pm |

    Hi Raj,

    I love this. I’m trying to make something similar with a colorduino that just flashes through some different symbols (like the asterik, but then other, non standard characters). I can change the asterik and turn off the scrolling text but I can’t figure out how to make symbols display on a loop.

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