I just bought this book a few days ago and can't wait until it arrives. I am new to electronics and I really hope to learn some basics from it. Thanks for the video! And greetings from Ukraine.
Ah good spot. Thanks. This is the danger of creating simplified versions of the circuit diagram. In the full circuit diagram the connection to the ground rail does have a pull down resistor, which is omitted here. I'll add a note to this effect in the description.
