Unboxing the Raspberry Pi

Although the Pi A+, B+, and Model 2-B are used for all of our projects, nothing covered in this book precludes the use of the older A and B models. The Pi you purchased might be sourced from many different suppliers. There are some critical differences that you need to be aware of if you plan to use the Pi for a hobby project or education tool:

Model type

GPIO header

SD type

Audio / Composite video

Raspberry Pi A and Pi B

26 pins


Separate TRS and RCA connections

Raspberry Pi B+, A+ and Pi Model 2-B

40 pins


Combined into a single TTRS connector

If you compare other revisions of the Pi with the following image, you will notice that there are some orientation and position changes for connectors ...

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