LBC6K
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note the power button on the side of the laser pointer. You’re going to
cause this to be “on” permanently by taking one of the cable ties and
wrapping it tightly around the laser pointer so that it depresses the button.
Once you’re sure it’s tight and the button is pushed down at all times, clip
off the excess plastic from the cable tie to neaten things up.
99. Here comes the fun part. We need to solder a piece of wire to the
spring in the laser pointer. Unscrew the end of the laser pointer where you
would normally install the batteries. (You might want to put that part aside
in case you ever want to use the laser pointer as a regular laser pointer
with batteries in the future). Take the included piece of wire and some
solder and maneuver your iron tip into the laser pointer. Solder the wire to
the spring as best you can without frying your fingers or the laser pointer.
100. When you’re satisfied that the wire is soldered to the spring correctly,
take a look at the PC board in the area near R14. You’ll see “D3”
silkscreened on the board and a line with an arrow on the end of it. For
future reference, this is the negative connection to the laser pointer. Next
to that line is another that comes from the area of Q1. Connect the end of
the wire you just soldered to the spring on the laser pointer to that point
between C4 and Q1 at the end of the silkscreened line.
101. We’ll now solder the negative connection to the laser pointer.
Remember the silkscreen on the board near the D3 mark, the line with an
arrow on the end? On the opposite end of the line from the arrow is a
hole. Take the included alligator clip and solder the wire end of it to this
point. The “gator” portion will be clipped to the body of the laser pointer to
provide the ground connection. You can do that now; attach the alligator
clip to the laser pointer since it will be easier to do before you mount it to
the PC board.
Just a few mechanical things to do and we can try out our new kit!
102. Now that the laser pointer is connected to the board properly we’ll
take the cable ties and connect it to the PC board. Slip the laser pointer
into place in its slot on the PC board and wrap a cable tie through the two
holes on either side of the slot at the end closest to Q1. Next take your
last cable tie and wrap it through the PC board and around the laser
pointer at the other end.
Look over your work carefully at this point because we’re getting close to firing
up our communicator and you’ll want to find any obvious problems now. When
you’re satisfied that your parts are in the right places, the laser pointer is
solidly set in the PC board, and all your solder joints look good it’s time to
locate a couple of 9 volt batteries and fire up the kit. Oh, you forgot to buy 9
volt batteries? Well, I’ll wait right here while you go out to the store and grab a
couple as long as you don’t take too long. When you get back, read on in the
next section so we can see how this baby you’ve worked so hard on operates!
Содержание Laser Beam Communicator
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