Choosing the connections

When building the robot, we will use a subset of the connections the Raspberry Pi has to offer. Let's take a look at what those connections are and how we will use them. As we connect sensors and parts to the Raspberry Pi, we will cover the connections in detail, so do not feel like you need to memorize these now. However, the following pin diagram can serve as a reference for these connections.

In Figure 3.1, the highlighted areas show the connections in use:

Figure 3.1 – Raspberry Pi connections

First, we will be using the power connector, labeled Power In and located at the bottom left of the diagram. This plugs in via a micro-USB connector similar to that on many phones. We will use this while learning to go headless, and this is one of the options for powering a robot. We can plug USB battery packs into this port if they can provide the correct amount of power. Raspberry Pi recommends 2.5 A power supplies, although...