Specifications

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3.5 Portable Unit Circuit Board
Given our variety of smaller circuitry and need for a compact solution, an
organized form of assembling the components needed is a requirement. There
are several options available. Some of the requirements and considerations is
that primarily, size must be as reduced as possible, especially for the portable
unit. In addition, cost is a consideration, as is the long-term reliability of the
method (quality). In addition, it must be durable enough to withstand use in the
real world.
3.6.1 Breadboard
One option considered was to simply use a prototyping or hobbyist breadboard.
This would be the lowest cost method, and would also prove the simplest to be
able to repair or fix in case of errors discovered in the circuit. It would simplify
replacement of any failed components.
However, it is the largest of all options, as the size of the circuit is given a
minimum size of the breadboard. While smaller breadboards can be obtained, it
is still restricted even by the spacing of the holes in the breadboard. In addition, it
does not have the durability characteristics of a portable device, since the
components are held in by friction. It is intended for a desktop or lab table
application, and would not work well in an environment where the device could
be turned to any orientation or subjected to shocks and movement.
3.6.2 Perforated Board
The second option was to use a type of board commonly used for being able to
retain the advantages of a breadboard, yet being able to make the circuit more
permanent. This type of board would allow for easy, low cost assembly, as well
as easy debugging and troubleshooting. In addition, it would allow components to
be soldered together for longer term durability.
However, the size is still an issue. While it can be made compact, It is still limited
by the limit of being able to organize the physical components. In addition,
electrical wire will have to be used between certain components, greatly
increasing the overall physical size of the circuit. However, it would be durable
enough for portable use; however, it is still not as durable as would be optimal for
the application of this project.
3.6.3 Printed Circuit Board
A third option would be to create a printed circuit board. This is the most durable
of all options considered, and also retains several other advantages. The