Open hardware devices offer a convenient way to keep old
hardware running because one can save time to develop a
microcontroller system. The software development environment
of the Arduino with a large number of available libraries
eases the implementation of standard applications like handling
input/output interfaces or controlling displays. The concept of open
hardware is at the moment emerging, systems with 16- or even 32-
bit processors are getting available, which are powerful enough to
cope with complex tasks like fast signal processing [9].