ABSTRACT
Figure 18.2 shows the main components present on the Pi's circuit board as well as the non-volatile secure digital (SD) memory card which connects to the rear of the circuit board (see Fig. 18.3).
One of the features that makes the Raspberry Pi ideal for use by enthusiasts and hobbyists is the computer's General Purpose Input Output
(GPIO) port. This allows the connection of all manner of additional inputs and outputs that can be accessed from a program running on the Pi. Couple this with the connectivity, networking and processing capabilities (see Fig. 18.4) and you have an excellent microcomputer-based development system capable of supporting some highly sophisticated electronic projects!
