Arduino boards have inputs and outputs. Indeed, this is also one of the strengths of this platform: to directly provide headers connecting the ATMega chipset legs. We can then directly wire an input or output to any other external component or circuit without having to solder.
In case you need it here, I'm reminding you of some points:
We are going to talk about digital inputs in this chapter.
We'll learn about the global concept of sensing the world. We are going to meet a new companion named Processing because it is a nice way to visualize and illustrate all that we are going to do in a more graphical ...