Digital Altimeters?

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Article #1033

#1033

From: Roy William Feague
Date: Sat, 03 Oct 1992 14:09

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Does anyone know of an inexpensive way to get altitude information to
a home-brew robot?  I am building a small platform to be carried by
a helium-filled weather balloon, and would love to get some feedback
on just how high the thing is.  Also, I am concerned that as the balloon
expands with lower air pressure on the way up, it might reach a breaking
point before it stops rising.  Any ideas on how to know when this will 
happen?  
	Regular analog altimeters cost about $250, and that's a bit pricey
for me.  I'd like to try to build a home-brew altimeter.  Any tips?

Thanks,
-Roy Feague

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Newsgroups: comp.robotics
Path: arc1-ca.pugleaf.net!sparky!uunet!caen!roy
From: roy@engin.umich.edu (Roy William Feague)
Subject: Digital Altimeters?
Message-ID: <Gz2-f8_@engin.umich.edu>
Date: Sat, 03 Oct 92 10:09:01 EDT
Organization: University of Michigan Engineering, Ann Arbor
Sender: roy@caen.engin.umich.edu
Distribution: USA
Keywords: digital altimeter fly
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