Having PCBs manufactured in
small quantities is very expensive, the more you have made
in a batch the cheaper the unit cost per board. For this
reason it's common in the electronics industry to have a single
PCB design that can be used in a number of similar products by
adding / omitting some components or changing the
microcontroller firmware.
Picprojects PCB480 has been
designed to be used in a number of different projects and
therefore depending on which project you build many of the component
positions on the PCB
will not be used.
When assembling a project using
this PCB please follow the schematic and construction
information on the specific project page.
For a full schematic and
details of all the features of the PCB see
here