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A project log for xmas_v2

A blinky charlieplexed LED Christmas tree ornament. The successor to 2014's xmas_v1 project

HybridAirHybridAir 11/07/2015 at 23:090 Comments

I think it's about time I formally announce this new project! I am making a blinky, snowflake-shaped LED Christmas ornament thing to give out as gifts this coming holiday season. It is driven by an ATTiny13, and displays 6 different animations on its 18 LEDs. A 3 volt CR2032 coin cell powers it all, which should make it last at least a few years in standby depending on use. A single button lets you switch animations, and wake it up/put it to sleep (on/off).

This project is a successor and direct improvement to last year's Tree_v2 (I still need to give it a formal project page), which will be renamed to Xmas_v1. I know the naming system was a little confusing, so it should hopefully make more sense now.

As of the day of this posting, I have finished the prototyping and programming part this project. You can find all the code I used in its GitHub repo, and see how it works in the video below:

Tonight I am beginning work on the hardware design part. I will make sure to keep you guys updated on how things are going. I should mention that I have also posted, and will keep posting many quick updates to my Twitter too. While they are not as in-depth as the ones here, they do happen more often.

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