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Compass Questions ?
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July 14th 15, 01:17 PM posted to rec.aviation.piloting
Dave Doe
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Compass Questions ?
In article ,
, Dave Doe says...
In article ,
lid, Bob
says...
Hi,
Thanks for replies and help.
What I was referring to are the new, modern, "glass" displays where most
everything shown is derived
from transducers located elsewhere.
e.g. when a display shows a Heading of, e.g., 075, it is of course
getting this info. from some kind of transducer, located elsewhere.
Is it derived directly from GPS ?
A Hall effect compass ?
or,... ?
Thanks again; interesting subject.
Well I'm not sure on that - perhaps others will reply. However,
cellphones usually use one or more magnetometers (hope I spelt that
right
). A GPS can't get a magnetic heading, only True.
I play with Arduino's a bit - and Googling 'arduino magentometer' gives
a few results, eg...
http://bildr.org/2011/01/hmc6352/
http://bildr.org/2012/02/hmc5883l_arduino/
http://eclecti.cc/hardware/hmc5843-m...ry-for-arduino
I *assume* that the compass in a glass display uses the same sort of
technology.
Apologies to the apostrophe police - that's terrible!
--
Duncan.
Dave Doe
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