In this long chapter, we learned to deal with many things, including monochromatic LEDs to RGB LEDs, using shift registers and transistor arrays, and even introduce the LCD display. We dug a bit deeper into displaying visual feedbacks from the Arduino without necessarily using a computer.
In many cases of real life design, we can find projects using Arduino boards totally standalone and, without a computer. Using special libraries and specific components, we now know that we can make our Arduino feeling, expressing, and reacting.
In the following chapter, we are going to explain and dig into some other concepts, such as making Arduino move and eventually generating sounds too.