Eggfinder RX Assembly Checklist
Before you solder anything, make absolutely sure that you have the correct part and that it is
inserted in the board correctly. The board has all of the component values, outlines, and
polarities silk-screened on the top, so there shouldn’t be any doubt about what goes where and
how. Nevertheless, if you have any questions about the assembly procedure, do not hesitate to
drop us a line at support@eggtimerrocketry.com before you solder the parts to the board. You
may have to wait a day for the answer, but it could save you a lot of grief later on!
The Eggfinder Limited Warranty does not cover damage to parts while attempting to
desolder them because you inserted something incorrectly. We spent a lot of time making
sure that the assembly instructions were clear, but once again if you have any questions about
the assembly procedures drop us a line at support@eggtimerrockety.com before you solder.
OK, so let’s get started…
__ Mount the the Voltage Regulator
Locate the large pad and the three small pads for the voltage regulator. Heat up the pad with
your soldering iron and melt a small amount of solder on the large pad, just enough to cover it.
Place the voltage regulator IC in place, and hold it down, then heat up the large pad on the
voltage regulator until the solder starts to flow. Hold your soldering iron on the pad for
another 5 seconds, then remove it and wait at least 10 seconds.
One by one, solder the three small three small leads to the pads, using enough solder to cover
the pad and get a good “tenting” on the leads without creating solder “blobs”. Wait at least 30
seconds between each pad to prevent the chip from overheating.
___ Mount the RED (PWR) LED
Insert the RED LED into the holes for the PWR LED, make sure that the LONG lead is in the
hole maked “+”. LEDs are polarized, if you put it in backwards it will not work, so double-
check! Turn the board over and solder the leads to the board. Trim the leads flush.
___ Mount the 2.2K Resistor (red-red-red bands)
Bend one lead back on the 2.2K resistor. Locate its position on the board, and insert the
resistor in the board. Turn over the board and solder the resistors in place, trimming the leads
flush afterwards.
___ Mount the 10 uF electrolytic capacitor
Insert the 10 uF electrolytic capacitor into the holes on the board, making sure that the lead
with the “- - - -“ markings next to it is inserted OPPOSITE the hole marked “+”. Double-
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