# 3 axis magnetometer issue in one axis

I have several 3-axis magnetometers mounted on breadboards, and they all read correctly in the x and z directions.

The Y direction is very strange; when turned to read 0, then turned 90 degrees counter clockwise, it reads 0 again. Then the values gradually get larger, peaking at about SE.

What could cause this behaviour?

I thought I had determined the breadboard itself was magnetic but I can't reproduce that.

• I was going to say some magnetic material nearby. Can you add some leads and move the sensor around? – George Herold Feb 24 '15 at 2:12
• Same issue with leads. If it was something nearby I would expect it to affect every axis. Thought it could be the breadboard because that was stationary relative to the board. – evandentremont Feb 24 '15 at 2:15
• Yeah I wanted to get it off the bread board? How sensitive is it? Nickel is magnetic ... though Nickel plating is thin. – George Herold Feb 24 '15 at 2:15
• Yep. It's on 10" leads now and same behaviour. – evandentremont Feb 24 '15 at 2:16
• It definetly isn't something in the area, when tipping the magnetometer on it's side the Z axis works as expected, and the Y (now Z) shows grossly different numbers when facing up vs facing down. – evandentremont Feb 24 '15 at 2:22