__ Locate the spot for the RED LED, it’s just above and to the left of the voltage regulator.
Note that there is a “+” next to one pad. Insert the RED LED into the holes with the LONG
lead in the pad marked “+”. Hold it in place with a piece of paper masking tape. Turn the
board over and solder the leads to the pads, using just enough solder to cover the pad and get a
nice fillet around the lead. Do not oversolder! Trim the leads afterwards, and save the
trimmed leads… you’ll need them later.
__ Locate the spot for the 10uF electrolytic capacitor, it’s above and to the left of the
voltage regulator. Note that there is a “+” next to one pad. Insert the capacitor into the holes
with the side marked “- - - -“ in the pad OPPOSITE the one marked “+”. (Yes, it’s annoying
that they’re marked “-“, not “+” like other polarized components….) Hold it in place with a
piece of paper masking tape. Turn the board over and solder the leads to the pads, using just
enough solder to cover the pad and get a nice fillet around the lead. Do not oversolder! Trim
the leads afterwards, and save the trimmed leads… you’ll need them later.
___ Insert the push button switch into the holes on the board. It has a little kink in the leads,
so it will stand off about 1/16” if you have the kink centered in the middle of the hole. Turn
over the board and solder the leads to the board.
___ Insert the AMBER LED into the holes for the 1S LED, make sure that the LONG lead
is in the hole maked “+”. Note that it may actually be clear. Hold it in place with a piece of
paper masking tape. Turn the board over and solder the leads to the board. Trim the leads
flush.
Section 6 – Mounting the RF Module
You will be surface-mounting the Hope RF radio module to the board, similar to the GPS
module. The pad spacing is larger, and the part itself is lighter, so it is much easier to solder.
There are no pads on the bottom either, so it should be a breeze once you’ve mounted the GPS
module.
__ With a piece of paper masking tape about 2” long, tape the board to your work surface
so it won’t move.
__ Cut another piece of masking tape about 2” long and about ½” wide.
__ Carefully position the Hope RF module on the board so that its pads line up in the
center of the top pads, the “half-moon” cutouts on the module should be centered on the pads
on the board. With the masking tape that you just cut, lay it across the top to hold it in place on
the board. Make sure that it’s properly positioned, there are some small holes on the pads on
the module, they should line up with similar holes on the board. You may find that a few
pieces of extra resistor lead are very helpful for lining up the holes, put one in each corner to
line it up before you tape the module down. If you do that though, be sure to remove it before
you solder that pad… you don’t want to solder the lead onto the pad!
It is important that the masking tape covers as much of the RF module as possible, up to the
exposed pads. This is to prevent any errant solder splatter from getting onto the RF module,
(54 paginas)
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