Hardware Reference
In-Depth Information
To make it easier to tell which pin is which, Dr Simon Monk has created a Raspberry Leaf
template with a label for each pin—you can cut these out and place them over the pins.
It is a good idea to download, print and cut out a Raspberry Leaf to help you know
which pins to use in the projects in this adventure. You can download the template
from the Adventure in Raspberry Pi website or from Dr Monk's electronics website
( www.doctormonk.com/2013/02/raspberry-pi-and-breadboard-raspberry.
html ) . Dr Monk's site has templates for both the Rev 1 and Rev 2 boards; be sure to
download the correct version for your board. Figure 8-3 shows the Raspberry Leaf for
the Rev 2 board.
FIGURE 8-3 he Raspberry Leaf for the Rev 2 board
You should take great care when connecting cables to the GPIO pins on your
Raspberry Pi. There are two reasons for this. First, you should be cautious to
protect yourself from harm. Second, the Raspberry Pi is a 3.3V device, and if you
plug in anything at a higher voltage than that it will damage the processor and
possibly render your board useless.
It is also very important that you connect any external components to the correct
pins on the Raspberry Pi, so it is essential that you refer to the correct GPIO
revision layout diagram.
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