Larger and Improved Christmas Star Neopixel Attiny85

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Introduction: Larger and Improved Christmas Star Neopixel Attiny85

About: I like to combine electronics like Arduino's, ESP8266 etc with 3D designing and 3D printing.

Last year I made a small 3D printed christmas star, see https://www.instructables.com/id/Christmas-Star-LE...

This year I made a larger star from a strand of 50 Neopixels (5V WS2811). This larger star had more patterns (I'm still adding and improving patterns and updating the code at my Github).

This larger star is made from wood.

Supplies

for the construction of the star

  • Wood
  • Wood glue
  • Staples

For the electronics

  • 5V power supply (> 1A)
  • strand of 50 5V WS2811 leds (Aliexpress)
  • Attigny85, Arduino or ESP8266 module
  • Wires and connectors
  • DIP socket for Attigny85 DIP (Aliexpress)

Step 1: Step 1: Construction of Frame

The wooden star is constructed of 10 pieces of wood, see the drawing. I made my star from a piece of wood which was 3 x 3 cm and was sawed in half to get a wooden plank of 3 x 1.5 cm.

From the geometry of a five points star I derrived the angles of 36 deg and 108 deg. My pieces are 32.5 cm.

I glued the pieces together and used staples to keep the pieces together. After the glue dried, the star was strong enough.

Edit Dec 2020: Angles in picture of wood piece are changed to the depicted values of 36 and 108

Step 2: Step 2: Insert the Leds

The diameter of the leds is approximately 12 mm. I used a wood drill to drill the 50 holes at a spacing of approximately 6 cm. The leds are suited to insert with a bit of force and stick to the hole.

Step 3: Step 3: Programming of the Brain

Here the fun part starts. You can use a Attigny85, Aruino or ESP8266 module to drive the LEDs. You can make all kind of patterns. The patterns are a matter of taste.

In my star I use a random generator to randomly select a pattern from the > 20 available patterns. The code for my star is in my Github (Christmas_star_v2.ino).

You can use my code also for LED figures with more or less LEDs and more or less spokes.

I found out that a bare Attigny85 has much more available memory than a Digispark module which I used in my smaller star.

See this website how to program a Attigny85 using a Arduino Uno.

See this website about the Adafruit Neopixel library which I used

See this website to select the HEX code of your desired colors.

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    10 Comments

    0
    daniel.furrer
    daniel.furrer

    Tip 7 months ago

    Watch out: The angles on the picture with the one piece are not what as indicated.

    0
    Wim3d
    Wim3d

    Reply 7 months ago

    Thanks for your comment. The described angles are correct, but the drawing is not scaled, it is just a simple schematic and not a cutting format. I will add such a format

    0
    Wim3d
    Wim3d

    Reply 7 months ago

    Nice result. How many LEDs did you use? Did you add new patterns?

    0
    daniel.furrer
    daniel.furrer

    Reply 7 months ago

    I used part of a 300 LED 5m strip and cut off 10 pieces which I then taped to one side of the star. I used a total of 165 LEDs for this star, so could make another slightly smaller one from the same strip. These 10 strips then had to be soldered together which was a bit annoying... but my wife did it 😅

    The exact strip I used is this one: https://www.amazon.de/gp/product/B01CDTEJBG/ref=pp...

    Here's another video of my star hanging with all the patterns (didn't actually look at your code but copied together a few sequences from elsewhere)

    Note that you don't see the LEDs here but the reflection in the window as they are facing outwards.



    0
    Wim3d
    Wim3d

    Reply 7 months ago

    I changed the picture so now the angles in the picture are 36 and 108 degrees. Good luck with your christmas star.

    0
    daniel.furrer
    daniel.furrer

    7 months ago on Step 1

    Thanks for providing these instructions.

    Just a word of warning. I used the image with the one piece showing 36 degrees and 108 degrees angles as a template and cut all my wood, then noticed the angles are quite wrong.

    0
    jsmirnio99
    jsmirnio99

    1 year ago

    Fantastic! Thanks so much for the construction guidance, and the new LED patterns!

    0
    Wim3d
    Wim3d

    Reply 1 year ago

    Thanks