SS49E Linear Hall-Effect Field Meter

Read magnetic field strength as an analog voltage — wave a magnet over the SS49E and watch the Arduino plot the field on the Serial Plotter.

Difficulty: Breadboard. Estimated build time: about 30 minutes. Estimated parts cost: about US$4.80. 4-part bill of materials with live supplier pricing. A pocket-sized magnetic field meter built around a single SS49E linear Hall-effect sensor.