Re: GPS for cycling use?
- From: Chris Eilbeck <usenet@xxxxxxxxxxxxxxxxx>
- Date: Wed, 26 Apr 2006 21:38:48 +0100
Andy M <ukhpr_GETLOSTSPAMMERS@xxxxxxxxx> writes:
I'd have gone for self-contained personally, and WITH baro alt. The
data can be picked straight out of the tracklog.
I figured that a terrain database is gonna be more accurate again than
a baro sensor and the increase in battery life between the Geko 301
and 201 would be worth having (9hrs vs 12hrs according to the Garmin
website).
Be careful mixing OSGB with WGS84. Google for info about converting
between the two! Maybe recent OSGB maps have dual grids overlaid now?
Don't think so but that's not so much of a problem if you use the
right code to do it. I've fallen into that trap before and ended up
with results up to 50m out horizontally.
Batteries - Garmin (older models at least) think that NiMH are half
empty within 10mins use after doing a cold reset. My Etrex quite
happily got 2 days use out in the forest, whilst permanently
indicating half full batteries, and has been running for an hour or
so indoors while I play with tracklogs and waypoints.
If you can get hold of the right connector, you can power a Geko from
two D, C or AA cells. I think I may end up going this way or building
a simple switching regulator to give 3V to a Geko from a LiPo.
Chris
--
Chris Eilbeck
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