The brains of this festive little tree is an ATmega328P, which you probably recognize ... wherein [Tom] walks through designing the PCB using Inkscape and Fritzing. Want to whip up a little ...

The unit uses an Arduino (with ATMEGA328P) and an MPU-6050 accelerometer ... The enclosure and stand are both 3D-printed, and a PCB not only mounts the components but also serves as a top cover ...