When you are satisfied that the GPS and RF sections are working, unplug the battery… you
can continue with the assembly.
Mounting the Processor and Remaining Parts
__ Remove the processor from the package. Note that it has a notch on one end; this
should match up with the notch on the left side of the PC board.
Test-fit the leads into the board. If they are a little wide, gently lay it against a table and bend
the leads slightly inwards. When you get a good fit, tape the processor to the board with a
piece of paper masking tape. Note that the processor will sitting about 2mm above the board,
since it will be resting on the resistors and capacitors below it. Try to get it to lay as square as
possible to the board; it won’t hurt anything if it’s crooked, but you want it to look nice.
Turn the board over and solder ONLY the upper right pin. Use enough solder to cover the pad
and make a nice solder fillet on the pin, but do not oversolder them so that you get a solder
“blob” covering the pin. Turn the board over, and make sure that the processor is facing the
proper direction. Turn it over, and solder the remaining pins.
__ Locate the spot for the resonator, it’s 3 pads at the bottom of the board right in the
middle of the processor, marked “XTAL”. Place the resonator in its place, tape it down so it
won’t fall out, turn the board over and solder the pins. Trim the leads flush.
__ Locate the spot for the 3-pin header, at the bottom of the board near the left edge of the
processor. Tape it down so it won’t fall out, and solder the header to the board.
__ Locate the spot on the board for the buzzer, there are two pads in a square just to the
left of the RF module marked “BUZZER”. Note that the buzzer is polarized, one lead is longer
and there is a “+” on one side of the case. Insert the leads into the pads with the long lead in
the pad marked “+”, it’s the one on the left side of the board. Tape the buzzer down. Note that
it will be slightly off the board, it will be sitting on top of the SN74HC02 Quad NOR Gate;
leave a little slack in the tape so it doesn’t end up crooked. Turn the board over, solder the
pads, and trim the leads.
Now you’re almost done… you just need to add the antenna.
Eggtimer TRS Antenna Options
The Eggtimer TRS has pads for either a permanent “stick” antenna or a RP-SMA edge
connector for a removable/remote antenna. Your choice of antenna will depend largely on
your rocket, how you plan to mount it, and how much range you need.
(54 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern