Arduino Forum

Using Arduino => Storage => Topic started by: Alex1503 on Oct 26, 2012, 02:46 am

Title: EEPROM & magnetic field
Post by: Alex1503 on Oct 26, 2012, 02:46 am
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 ?
Title: Re: EEPROM & magnetic field
Post by: JChristensen on Oct 26, 2012, 04:00 am
Nope, the chip is silicon, non-magnetic.
Title: Re: EEPROM & magnetic field
Post by: 68tjs on Oct 26, 2012, 09:36 pm
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
Title: Re: EEPROM & magnetic field
Post by: robtillaart on Oct 27, 2012, 12:11 pm

make a shield from cardboard , alu-foil and duct tape around the electronics.
Title: Re: EEPROM & magnetic field
Post by: Grumpy_Mike on Nov 05, 2012, 10:39 pm
That will not stop a magnetic field, so it is lucky that a magnetic field will not effect the EEPROM isn't it.
Title: Re: EEPROM & magnetic field
Post by: Zapro on Jan 01, 2013, 01:07 am
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.