looking for cheap low grade magnetic compass

The nicest (accuracy wise) compass I have used is the Devantech
CMPS03. The interface is a timed pulse, or a I2C. I have interfaced to
both with good success. It's a bit expensive, as shown from Acroname
for $52.

http://www.acroname.com/robotics/parts/R117-COMPASS.html

Some people use the Dinsmore compass, but it only gives you rough
quadrant or so accuaracy.

http://www.dinsmoresensors.com/index.html

I couldn't find price information on this one, and I have never
personally used it.

I've often thought about adding a compass to our product line. If you
would be interested, contact me off list, and we can discuss what it
would take.

--
Randy M. Dumse
www.newmicros.com
Caution: Object in mirror are more confused than they appear.