Hardware Reference
In-Depth Information
Introducing the different versions of Arduino
Initially, there was only a single board, which made selection easy. However, as the com-
munity of Arduino users has grown, so have the many different needs for different sizes,
capabilities, and form factors. There are now many different Arduino versions and even Ar-
duino clones. There are also chips that allow you to create your very own Arduino-like sys-
tems. There are many well-known and popular versions of Arduino for you to consider for
your project. However, they are too many to be listed and discussed here.
There are some that are very powerful but also have a much larger form factor and are
more expensive. There are some that are extremely small and inexpensive, but they are
somewhat limited in the size of programs and interfaces. Here are some of the most popular
versions of Arduino.
Arduino Uno R3
Perhaps the current most popular version of Arduino is the Arduino Uno R3 (or Rev3). The
following is an image of the unit:
Choosing the Arduino Uno R3
This is a standard choice for many Arduino projects. It has 32 KB of space for programs,
which is a relatively adequate amount for most small-to medium-size programs. It has an
ATmega328 processor running at 16 MHz and the standard Arduino set of I/O pins, 14 di-
gital I/O pins, six analog inputs, and one serial communication port. It takes a USB A Male
to B Male cable, as shown in the following image:
