a DIY flat christmas decoration with a ATtiny25, 20 led´s and a coin cell battery
This is a only 2 dimensional pcb with all the components embedded into the 1,6mm thick pcb itself. The components are placed with the help of castellation into the pcb.
All files including the Code for the ATtiny and the KiCad Files for the PCB are here, OSHW!
a helper to get the patterns graphically made: https://designer2k2.github.io/2d-xmas-tree/
see the wiki page on how to make it: https://github.com/designer2k2/2d-xmas-tree/wiki