For additional information about soldering, see http://radiojove.gsfc.nasa.gov/elab/soldering.htm
Insert one of the 220-ohm resistors from
the top of the PCB. The resistor conducts current equally well
in either direction, but good practice requires that
you
orient
the
resistor
so its color code can be read from the top down. The resistor has
colored bands of red, red and brown (for 22 x 101)
and a gold band to indicate 5% tolerance. Red should be at the
top.
Turn the board over and solder the 2 leads.
When finished, you should see a small "candy kiss"-shaped
mound of solder that clings to both the solder pad on the PCB and
to each of the resistor's wire leads. You should also be able to
see that the solder has passed through the hole in the PC board.
Before continuing, use the side cutters
to cut off the excess wire, being very careful
to protect your eyes and the eyes of every one around you.
