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Topic: EEPROM & magnetic field (Read 2529 times) previous topic - next topic


Will magnetic field of 12v DC micro motor mess up or destroy the memory of EEPROM chip if place it  2...3 cm away from the chip ?

Jack Christensen

Nope, the chip is silicon, non-magnetic.


I also think the eeprom will not be destroy  but not for the reason indicated: magnetism is able to change the polarization of light in a fiber optic  yet the glass is not magnetic. Magnetism is very complex.
However it may occurs interferences that affect the value of some bits and cause errors.
Only if you find any errors place a magnetic shield (soft iron) between the motor and the EEPROM


make a shield from cardboard , alu-foil and duct tape around the electronics.
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)


That will not stop a magnetic field, so it is lucky that a magnetic field will not effect the EEPROM isn't it.


Even the strongest magnet you can get Your hands on, won't affect the EEprom, so you're safe.

BUT you can get electrical noise from the motor on the supply lines, and that can mess up the communication to the EEprom, so try to keep the supplies split.

// Per.

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