Dog collar GPS size? - Northern Colorado Rocketry

This topic has 16 replies, 5 voices, and was last updated 16 years, 6 months ago by Kenneth Reilly.

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March 1, 2009 at 4:57 am #40552
Dreasher
What’s the smallest size NC you can fit a Garmin dog collar into without huge amounts of mods? Can it fit in 2.1 nose cone?

Ron
March 1, 2009 at 2:54 pm #49994
SCOTT EVANS
Taken apart with the ant. turned side ways (if you dont break it) 38MM
March 1, 2009 at 9:53 pm #49995
new2hpr
Participant
I thought (from Mike Konshak’s work) that 38mm was just slightly too small. I remember he tried to grind off the corners of the pcb, but either shorted layers or cut traces when he did so.

I’d like to draw up a 38mm housing to hold the bare unit if someone has prints of the pcb outline dimensions. A nice chunk of hogged out delrin would make it almost as sturdy as the original housing. Would be a good practice project in Solidworks.

Ken
March 2, 2009 at 3:00 am #49996
SCOTT EVANS
Fit into mu Cirus Dart body…… 38MM
Unfortunetly a wieght beaking out of the nose at the last launch of my 3″ rocket. broke the ant. I have yet to try my luck soldering.
March 2, 2009 at 4:16 pm #49997
new2hpr
Participant
That’s great news, as I’m overbuilding a LOC Legacy for the I200 right now, and I’d rather not lose it.

Ken
March 2, 2009 at 5:48 pm #49998
mule
Participant
1.5″x1.5″x6.5″ is the smallest dimensions. But, you can take the “ears” off where it has screw holes on all 4 corners and make it a bit smaller. I am wrapping mine in thin foam and heat shrinking it to keep the antenna from breaking. You can catch me at the launch to see how it does…. 😛
PS, if you want to see new pictures of the mount, look at Mike’s DC20/30 post. I uploaded new pics last night.
Greg
March 2, 2009 at 9:11 pm #49999
Dreasher
So, If I’m careful/creative I can make fit a 38mm min. project. I’m going to try make it up Sat. and poke around to see how people are using them. Is the DC30 any smaller or lighter? It looks like they pulled the GPS antenna out so the battery can hang under the dogs neck instead of the back of the neck like the DC20. Does this change how it can be used for a rocket?

Ron
March 3, 2009 at 12:13 am #50000
new2hpr
Participant
I don’t think even Mike has dissected a DC30 yet. Would be nice if they’ve shrunk it further or fixed the problem with the antenna connector going the wrong direction (for us anyway).
Ken
March 3, 2009 at 1:15 am #50001
SCOTT EVANS
I don’t think even Mike has dissected a DC30 yet. Would be nice if they’ve shrunk it further or fixed the problem with the antenna connector going the wrong direction (for us anyway).
Ken

Ive got a DC-30 showing up tomarrow, and Ill have it in my rocket this weekend. If you each give me a dollar you can look at it! Might even let you touch it for two! 😉 (hey its expensive and ive got to get some of my money back)
Although I wouldnt be suprised if Mike has one this weekend too. 🙂
March 3, 2009 at 6:00 pm #50002
mule
Participant
Awwww shucks, you didn’t have to pay to see CiBi’s DC20…. That’s no fair…
Just watch out for people saying “hey, look over there”

Hey Ken,
there is an elbow you can buy to reposition the antenna. Locally, you can get it from Ham Radio Outlet over on Iliff – west of S. Parker rd (Aurora). If you need one let me know and I’ll try to run over there at lunch one day this week.
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