Magnets Are Bad for Hardware Again

2 days ago

Magnets historically posed risks to tech like floppy disks, hard drives, and CRT monitors, potentially causing data loss or screen distortion.
Modern solid-state devices like SSDs and LCDs are less vulnerable, but smartphone cameras (e.g., iPhones) can be affected by magnets due to magnetic sensors and actuators in optical image stabilization (OIS) and autofocus systems.
Poorly designed magnetic accessories (e.g., cases, mounts) may interfere with camera function, though typically causing temporary issues rather than permanent damage.
Many phones use similar camera tech, making them susceptible; Samsung has patented mitigation methods like magnet orientation and shielding.
Strong magnetic fields from sources like MRI machines or industrial equipment pose real threats, while everyday magnets usually have minimal effect due to distance and shielding.
Hard drives are shielded (e.g., mu-metal enclosures) and require high flux to erase data; anecdotal evidence suggests casual magnet exposure rarely causes harm.
Other tech like speakers at concerts or industrial settings (e.g., aluminum refineries) can generate damaging magnetic fields, affecting devices like radios or hard drives.
Historical anecdotes include magnets corrupting floppies, damaging relays in radios, or causing system errors in mainframes when placed near sensitive equipment.

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