Humans can't detect magnetic fields, but we use devices that rely on magnets all the time. Motors, compasses, rotation sensors, and wind turbines, for example, all require magnets for operation. This ...
<td><a href="https://www.sparkfun.com/products/19034"><img src="https://cdn.sparkfun.com//assets/parts/1/8/6/3/7/19034-Triple_Axis_Magnetometer_-_MMC5983MA__Qwiic_-01 ...
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