The rover will have a gps unit, but I'd like to have two sources of
direction

----- Original Message ----- 
From: "Josh Koffman" <joshybear@gmail.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Friday, February 11, 2005 5:15 PM
Subject: Re: [EE] Compass (magnetic sensor)


> If your unit is always moving and has a line of sight to the sky, you
> could use GPS. Not an ideal solution, I know. There used to be a bunch
> of compass sensors, but at most they gave you 16 cardinal points I
> believe.
>
> Josh
> -- 
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>
> On Fri, 11 Feb 2005 15:59:39 -0800, Padu <padu@merlotti.com> wrote:
> > Quick question, I'm selecting a "magnetic heading" solution for my
autonomous vehicle platform. I've already searched the pic archives and some
robotics sites on the internet, and here are the main suppliers that I
found:
> >
> > -Honeywell HMR line - too expensive, although they have one model under
$100
> > -Dinsmore - bad resolution or bad frequency (2.5s update rate)
> > -Devantech - I liked this one, is not too expensive (around $50), 1Hz
update and 0.1 deg resolution (5deg acc)
> >
> > Do you have any other pointers?
> >
> > What is important to me: 1) cost 2) update rate (2Hz is desireable, 1Hz
is ok) 3) resolution (1 degree is fine already) 4) accuracy (5 deg is ok I
guess)
> >
> > And of course, easy to integrate with a PIC
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