Mosaic
Well-Known Member
Ok, I need a rough digital magnetic direction finder.
I am considering using an actual compass such as this:
**broken link removed**
Compass needle sensed by a linear hall sensor, perhaps this:
https://www.jameco.com/Jameco/Products/ProdDS/1915940.pdf
Hall signal fed to a PIC ADC.
I am thinking I could profile the ADC values to reflect the compass needles orientation and thus be able to derive a passable direction finder perhaps +/- 5° (a guesstimate). Also by tracking turn direction I could differentiate between the two perpendicular orientations of the needle to the hall sensor.
I haven't tried to evaluate the gauss of a compass needle magnet , but it should be of reasonable strength to work with I think.
Sounds doable?
I am considering using an actual compass such as this:
**broken link removed**
Compass needle sensed by a linear hall sensor, perhaps this:
https://www.jameco.com/Jameco/Products/ProdDS/1915940.pdf
Hall signal fed to a PIC ADC.
I am thinking I could profile the ADC values to reflect the compass needles orientation and thus be able to derive a passable direction finder perhaps +/- 5° (a guesstimate). Also by tracking turn direction I could differentiate between the two perpendicular orientations of the needle to the hall sensor.
I haven't tried to evaluate the gauss of a compass needle magnet , but it should be of reasonable strength to work with I think.
Sounds doable?