How to develop a logic circuit with several million transistors? What should a circuit look like that adds two numbers? What should a circuit look like that determines when your alarm clock rings and it lights up the right display?

The secret is the **Boolean algebra**.
It is the **basis** of all digital circuits and computer chips.
With the following experiments you get to know the
Boolean **variables**, **operations**
and the **set of rules** and
you experience it using logic circuits.

The set of rules is, in fact, very simple, but **powerful**.
With help of these rules you can
**reduce** and **simplify
complex logical problems until
you are able to build the actual circuits.
In this way you can develop adders,
comparators and
decoder.
**

Before you can start with the first experiments,
make a **few preparations**.