Compass Circles

In my effort to build the calibration software for my simple Digital Compass, I’ve been working on doing tests with it.

Here is a screen-shot of the output (using MATLAB to interface to the serial port), it shows a plot of X & Y magnetic field readings plotted on X/Y axis. You can see it’s a (fairly) nice circle. The object will be mapping a distorted circle due to iron in the area onto something like that…

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