www.hamgadgets.com
2014-01-17
ID-O-Matic III
23
Assembly Instructions
Assembling your ID-O-Matic III should be relatively easy if you have some prior kit building
experience. There are no surface mount parts, and only a few of the components will require any
special techniques. If you feel you may have trouble completing the assembly, or if this is your
first attempt at kit building, it would be a good idea to enlist the help of a more experienced
builder.
A few of the parts are static sensitive, so be sure to take appropriate precautions when working
with those. Parts that might be damaged by exposure to static charges include Q1-Q5, the
voltage regulator VREG, and of course the PIC microcontroller chip. It’s best to leave those
parts in their protective packaging (conductive foam or strips) until just before you insert them
into the board. Use a soldering iron with a grounded tip, work at a static dissipative surface
(metal or wood are good) and wear a grounded static dissipating wrist or ankle strap if you have
one. If the humidity is very low where you’re working, you might want to consider a working
with a humidifier running – or use the old technician’s trick of a teaspoon or so of fabric softener
in a spray bottle full of water, spritzed lightly around the area once a day or so.
All parts are inserted from the top of the board (the side with the white silkscreen printing).
Bend the longer leads at a 45° angle to hold the part in place while you solder it, then trim the
leads off close to the board using a pair of flush cutters. For the parts that don’t have long leads
(IC socket, USB connector, etc.) you can use a piece of tape or some other arrangement to hold
the part snug against the board while you solder.
Use enough solder to make a good fillet, but not so much that there is a solder ball sitting on the
pad. Again, if you’re new to soldering you may want to get a friend to help out, or try a couple
of inexpensive practice kits first.
Содержание ID-O-Matic III
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