Interlocking PCB RGB LED Christmas Tree

Christmas tree shaped PCB that interlock for a 3D effect with individually controlled RGB LED for festive light patterns.

rohan.woods

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Description

The design uses 3 interlocking boards in the shape of a Christmas tree and an Attiny85 to control 22x WS2812C RGB LEDS. These are lower power (5 ma per colour) versions of the WS2812B (also known as Neopixels). The B versions end up too bright, even with the C versions I ended up running at 20% brightness). These are covered with foam dots to defuse the light. A boost converter ups the battery voltage to 5v and a charge IC takes care of battery management. I have put in the circuitry for reprogramming the Attiny from the USB port, but I have not tested it yet.

Details

Build Gallery:

https://imgur.com/a/bX1Yeng

Flashy lights!

Files

Xmas Tree Base.sch sch - 458.54 kB - 12/13/2019 at 01:37		Download
Xmas tree Part 1.sch sch - 405.08 kB - 12/13/2019 at 01:37		Download
Xmas tree Part 2.sch sch - 205.05 kB - 12/13/2019 at 01:37		Download
Xmas tree Part 1.brd brd - 171.14 kB - 12/13/2019 at 01:37		Download
Xmas Tree Base.brd brd - 97.40 kB - 12/13/2019 at 01:37		Download

View all 8 files

Components

22 × WS2812B
23 × C-EUC0805K 0.1uf C-EUC0805K C0805K
1 × ATTINY85-20SUR ATTINY85-20SUR 8S2
1 × COILCRAFT_DO3316P-472MLCOILCRAFT_DO3316P-472ML_0_0 COILCRAFT_DO3316P-472MLCOILCRAFT_DO3316P-472ML_0_0 COILCRAFT_DO3316P-472ML_0
1 × NTGD1100LT1G NTGD1100LT1G SOT95P275X110-6N

View all 24 components

Discussions

Felix wrote 12/20/2019 at 12:15

I just recently did a little challenge with students learning to solder stuff. This would've been a great project, too. :)

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steve wrote 12/18/2019 at 17:47

What's approx cost (USD) for this project? Do you sell the boards? Would you please post a parts list? Thanks!

Are you sure? yes | no

rohan.woods wrote 12/19/2019 at 22:26

The BOM comes in around $15-20 getting the parts from Mouser and the WS2812C from LCSC. I need to do a redesign that uses LCSC parts as they are much cheaper. You can download the BOM and PCB files. I don't sell the boards as it's a work in progress, but you can grab the Eagle files and export the gerbers and any PCB house will be able to make it for you. I used JLCPCB as you can combine shipping with the leds.

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Interlocking PCB RGB LED Christmas Tree

Description

Details

Files

Xmas Tree Base.sch

Xmas tree Part 1.sch

Xmas tree Part 2.sch

Xmas tree Part 1.brd

Xmas Tree Base.brd

Components

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Interlocking PCB RGB LED Christmas Tree

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