Introduction: Christmas Tree Top Star Bling

Picture of Christmas Tree Top Star Bling

A cool bright and colorful LEDs star to bling your Christmas tree this holiday season made from addressable Neopixel LED strips and Arduino microcontroller.

Step 1: Checklist

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  • Neopixel/ WS82xx addressable LED’s(Set of 3 Led’s X8) --

  • popsicle stick (8)

  • Arduino pro nano or pro mini

  • Solder Iron

  • Wires
  • Glue gun

Step 2: Let's Get Started

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Place all the sticks as shown in the photograph. All the sticks should be at the same angle for a perfect shape.

Step 3: Stick Em Down

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Use a thick beat of hot glue to stick them together at the center.

Step 4: LEDs All the Way

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Test place LED strip, cutt in 3 per side and ensure the arrow on the neopixel led should be facing outside.

Neopixel LEDs have 4 pins:

1. VCC - for power, generally +5v but you should be good above +3volts

2. gnd - for power supply ground

3. Din- this gets input signal from microcontroller.

4. Dout- To send signal to next LED. This allow daisy chaining LEDs.

Step 5: Stick on Sticks!

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Apply glue on the led strip and fix it as shown.

Step 6: Taking Shape

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Repeat last step for all sides and you'll see start taking shape.

Step 7: Connection Time

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ConnectDin pin of led strip with any of the digital pin of Arduino with the 1st branch of star, and then connect Dout of 1st with Din of 2nd , Do of 2nd with Din of 3rd and continue doing this until all the strips are connected together.

Step 8: Wire Management

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Connect the USB cable with Vin and Gnd pin of Arduino Pro Mini and manage wire using glue gun on back side of stick.

Step 9: Program It.!

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Arduino uses Adafruit Neopixel LED library to drive them. Download Neopixel library from arduino library manager or from adafruit Github, extract under arduino library folder.

Library Link -

Code: Use library sample program - Strandtest and you're good to go. You can also program custom animations, just refer examples from library.

Merry Christmas and Happy new year :)

Step 10: Video


JohnW51 (author)2017-12-26

I really like this idea. Could you please provide a schematic or sketch of how the Din/Dout pins of the strips are connected. I can't really tell from the photos.

JohnW51 (author)JohnW512017-12-30

Thanks, that's really helpful.

iAyanPahwa (author)JohnW512017-12-30

Added in step 7.

JohnW51 (author)2017-12-26

Also, how about a video showing the star in action?

JohnW51 (author)JohnW512017-12-30

Beautiful, thanks.

iAyanPahwa (author)JohnW512017-12-30

Added :-)

About This Instructable




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