What is it?

The Celtic Christmas Tree is a DIY surface mount soldering kit with 80 LEDs, 20 resistors, 4 capacitor and 4 ATtiny13s. It can be powered using USB or 4.5 V battery packs. The LEDs are independently controlled by an ATTINY 13 using charlieplexing. Demo code, which displays the a random blinking pattern shown in the YouTube video, comes preprogrammed on the microcontrollers. New code can be uploaded to the device with AVR dude using a Bus Pirate, a AVRisp mk II or similar. It is not Arduino compatible.

Why did you make it?

I have a tiny apartment and it needed a matching Christmas tree.

What makes it special?

It is an introductory SMD soldering kit that you will want to display or give as a gift.

Additionally, I have done my best to document the theory, assembly directions, and even the design process.