Look at the printed circuit board (PCB)
and be sure you understand how it should be oriented. All the components
(except for insulated feet) will be placed on top of the board while
it is oriented as shown at left. To attach each component, you will
turn the board over and solder from the bottom.
Notice that the board is "double sided," meaning
that it has lines of metal printed on both top and bottom. These metal
traces are the "wires" which will conduct electricity.
Look closely at some of the holes on the
board. They are "plated through" so that metal goes through
the board at those points.
The board is also coated with a protective
covering, so that metal is only exposed in and around the holes. Some
of the largest holes have no metal traces, since they will be used
for mechanical connections, not electrical connections.
