As a Christmas preparation I have buildt "Velleman MK100" Electronic Christmas Tree project. This is a fun little project, good for soldering exercise. <br>You can check the whole build process here:<br><a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=zqXr3DakNBc&t">https://www.youtube.com/watch?v=zqXr3DakNBc&t</a>