As all others have said regarding the capacitors.

Since this is in a moving truck, have you considered static
electricity. The truck could get charged and will discharge now and
then which could create short but large current surges throughout the
chassis. If your board isn't correctly grounded or doesn't have a
good ground plane you could get some of that current through your
board. Especially if you have long unshielded and/or incorrectly
terminated cables connected to you board from different parts of the
truck.

/Ruben

> Hi all,
>=20
> Have a product working very well for a long time on the bench, but in a=20
> truck I'm getting EEPROM data corruption.  Only real difference is the=20
> power source.  Is this possible?  I switched to an external EEPROM and=20
> haven't tested on the truck yet, but thought I'd ask in the mean while.
>=20
> My power supply is fairly basic --  reverse protection diode, small=20
> resistor, 8V regulator, then 5V regulator.  0.1uf caps on the input and=20
> output of the regulators.  Total current draw is 60mA.
>=20
> Cheers,
> -Neil
>=20

--=20
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