Hall Effect Sensor And Iron Filings Show Fridge Magnet Pattern  #magnetism #experiment #electronics
Channel: More Than Electronics
Date: 2024-01-28

Typical refrigerator magnets (magnetic business cards) have an unexpected magnetization pattern built in.  Iron filings are sprinkled on a piece of paper placed over the magnet to visualize the pattern.  When two magnets are stuck together with their patterns lined up it can take some effort to slide them across each other.  A linear Hall Effect sensor is shown varying the brightness of an LED as the north and south poles pass the sensor.