Visualizing magnetic fields in three dimensions with an Arduino magnetometer
As humans, we can’t detect magnetic fields, but we take advantage of this phenomenon every day in the form of motors and various sensors. Even electrical wire produces a field when current flows through it. You can perceive magnetism with a compass, but if you want to visualize it in three dimensions, maker ‘amamitof7’ has a solution: an Arduino magnetometer.
The device uses a trio of analog Hall effect sensors to measure the strength of the magnetic field. This data is fed to a MKR WiFi 1010 (or Uno), which generates an isometric representation of the field on a small TFT display.
One could see this used in a variety of diagnostic applications, or perhaps as an excellent physics teaching tool.