Preliminary Testing - Eggtimer Rocketry Eggtimer TRS Assembly Manual

__ Solder the remaining pads to the board, waiting 30 seconds between pads to prevent the
module from overheating. If you inserted resistor leads into the holes to line them up, be sure
to remove them before soldering.

Preliminary Testing

At this point of construction, your board will actually behave just like an Eggfinder TX board,
that is, it will stream raw NMEA GPS data continuously from the RF module. The frequency
will be 915 MHz (ID = 0 if you have an LCD receiver
Solder the battery connector that you're going to be using for the computer power to the
__
two BATT terminals on the right side of the board. CHECK THE POLARITY: Normally, the
"+" lead is red, and the "-" lead is black. If you're not sure, connect a battery to the bare
pigtail, and check it with a DVM BEFORE you connect it to the board.
__ Connect the battery. The RED LED should immediately light. If it does not,
IMMEDIATELY disconnect the battery and check all the solder joints in and around the
voltage regulator, 10 uF capacitor, RED LED, and the 2.2.K resistor next to the LED.
__ After about one second you should see the little red LED on the RF module start
blinking, about once per second. This means that the GPS module is sending data to the RF
module. If it does not, IMMEDIATELY disconnect the battery and start troubleshooting.
__ If you have an Eggfinder LCD receiver, turn it on, set the frequency to 915, ID=0, reset
it, and it should start receiving data. If you're outdoors you should start seeing a fix within a