Christmas tree made from WS2812 leds

9 Dec 2018

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I would like to present a small Christmas tree made from 15 WS2812B LEDs connected to attiny13 MCU. Tree is made from 5 stripes with 5, 4, 3, 2 and 1 LEDs. LEDs are driven from single pinout PB4 of Attiny13 MCU. Below is schematic:

MCU was put in cartridge from 35mm tape. As power supply I have used 5V from USB. Code is written in C with usage of light_ws2812 library. Below there is output from compilation:

There are five different effects for which we could modify brightness and delay. Below are few more photos:

Source code is available in attachment. Below there is short video presentation:

Second video recorded with different camera setting:

Attachments:

sources.zip

Top Comments

kk99 over 5 years ago in reply to shabaz

Thank you.
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shabaz over 5 years ago

Very cool project : )
Nice to see quick-to-build microcontroller projects such as this, yet the end result looks really nice!!
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kk99 over 5 years ago in reply to dubbie

Hi,
For programming I am using this USB programmer: https://www.fischl.de/usbasp/ and avrdude software. Example of command to program this MCU you could find in Makefile in attached sources.
Here is example of connection:
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dubbie over 5 years ago

What a brilliant LED Christmas tree. I'm not entirely sure what ws2812 LEDs are though.

Also, how did you program your attiny13? I have purchased some atiny85 to use in my ideas but so far I have been unable to programme any. All the searches bring up UNOs (which I do not have - I have Nano V3 and so far I haven't found any information on how to use these to programme the attiny85). SparkFun do an actual programmer which I was going to buy one but they do not have any in stock.
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ntewinkel over 5 years ago

That's really nice!
Great idea and well executed

-Nico
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