ECU/MAX232 noise

[Barry Tisdale]

There was a recent thread on the noise pickup @ WOT on some of the MAX232
serial interfaces.  Solved mine by running the interface off a separate
battery; no amount of noise filtering seemed to have any effect when
applied to the +12v line.  Even a shielded cable carrying the serial data
from the ECU to the interface didn't help, nor did pulling up & down the
serial data line.

That chip must be *real* sensitive to noise!

Barry - Sy#26