When building the robot, we will be using a subset of the connections the Raspberry Pi has to offer. Lets 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 you need to memorize these now. However, this pin diagram may serve as a reference for these connections.
In the following image, the highlighted areas show the connections in use. Note that on the 3+, there is an additional four-pin connector (POE) that we will not be using. First, we will be using the power connector, located at the top right of the following image; 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...