Prototypes are used to prove the specifications for a working concept or process rather than theoretical ones. A prototype, as we are referring to it in this book, is a model to test a concept or process. For simple concepts or process, we may create a prototype for the whole system but for my complex systems, we will want to break the system down into individual components and create a prototype for each component.
Prototypes with the Arduino usually consist of one Arduino microcontroller with one breadboard used to connect the components to the Arduino. For these prototypes, I use a holder that I designed and printed out with my 3D printer. The following photograph shows the holder with an Arduino Uno, Nano and a breadboard ...
