SHARPENING YOUR TOOLS OF CREATIVITY
from your LAN and/or the Web.
Any modern computer, tablet, or
smartphone can be used to interact
with your project.
I hope the above list has whet
your appetite, and got you started
thinking about possible PICAXE-Pi
projects of your own. However,
before we get to that point, we need
to implement a simple way of
accessing the Pi’s GPIO pins so that
we can begin our experiments.
There are several commercial
printed circuit boards (PCBs) on the
market that we could use for this
purpose, but it’s not easy to know
what features you need until you
have had some actual experience.
So (as usual), our first approach to
interfacing with the Pi will involve a
simple stripboard circuit.
Before we can actually design
and build a basic interfacing circuit,
however, we first need a good
understanding of the Pi’s power
capabilities (and limitations) and its
GPIO pin arrangement.
Setting Up A New
There are currently two available
models of the Raspberry Pi. We will
focus entirely on the newer version
(model B) because it’s much more
powerful than the older model A,
and only costs an extra $10.
When you purchase a new Pi,
you will receive the
assembled unit in a small
cardboard box. Absolutely
nothing else is included (not
even the operating system),
so let’s begin by discussing
the additional items you need
to get your Pi up and running.
In order to install and
configure the operating
system, you will initially need
to connect the Pi to a
monitor, USB keyboard, and
USB mouse. Once you have
completed the initial setup,
there are two other options
for connecting to the Pi that
don’t require any of the above three
■ FIGURE 1. The Raspberry Pi, Model B.
Once you have
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