Eggfinder GPS tracker
I have built the GPS tracking system from Eggfinder. The kit cost $175 complete with shipping. I traded e-mails with Cris Erving before he would sell me the parts. once I understood the difficulty of soldering these tiny parts the order was completed and received in 3 weeks.
The build went perfectly. The initial tests showed both receiver and transmitter were talking and each item showed GPS coordinates from multiple satellites.
Then I set about building the sled. Where you see the rubber band lashing now, I initially tightened a plastic wire tie. Yes, it was stupid to think the tiny board could handle the load of tying down the battery.
Yes, one to many clicks and I heard as well as felt a tiny "snap". Oh Lord, save this wrench. Transmission lost. GPS not getting to transmitter.
I was able to bandage/ bridge the hair thin copper trail under the top layer of plastic.
All systems nominal today .
Uploaded files:
I hope to use the tracker Sunday.
12 mph winds from SE as per Metro forecast.
Flying my Optima on a G77 Sims to 900+ ft. I hope this thing works.
Chris Oliver
aka : Have seen my nose cone?
Quote from oliverhub on March 13, 2026, 5:53 pmI have built the GPS tracking system from Eggfinder. The kit cost $175 complete with shipping. I traded e-mails with Cris Erving before he would sell me the parts. once I understood the difficulty of soldering these tiny parts the order was completed and received in 3 weeks.
The build went perfectly. The initial tests showed both receiver and transmitter were talking and each item showed GPS coordinates from multiple satellites.
Then I set about building the sled. Where you see the rubber band lashing now, I initially tightened a plastic wire tie. Yes, it was stupid to think the tiny board could handle the load of tying down the battery.
Yes, one to many clicks and I heard as well as felt a tiny "snap". Oh Lord, save this wrench. Transmission lost. GPS not getting to transmitter.
I was able to bandage/ bridge the hair thin copper trail under the top layer of plastic.
All systems nominal today .
FYI, a fillet of epoxy along the GPS antenna and receiver (NOT where the leads are soldered) will help keep that unit intact if a hard landing. I believe Cris has some verbiage about that in the instructions... or, at least, he did.
Nice job. Make certain you're getting the GPS data and verify the latitude and longitude with Google Earth.
Thanks Brian. Your launch controller inspired me. I made epoxy filets on the GPS chip as per kit instructions. The bandage is also potted with epoxy.
Long. 40.162518
Lat. -74.083156
I use those on gpsDriftCast.com