Some time ago I won the book "Arduino - Ein schneller Einstieg in die Microcontroller-Entwicklung" (https://www.dpunkt.de/buecher/11630/9783864901263-arduino.html). Later I bought the "Elegoo UNO – Ultimate Starter Kit". Both - book and box - are now standing on the shelf. Every once in a while I take the time to get a closer look at it. So first I go through the book bit by bit and what comes out of it ends up here ...