Just a couple of personal observations:

All logging is more useful when you have a long history to compare it with.

Logging to a thumb drive or a flash drive is not all that difficult or=20
expensive.


On 9/9/2017 2:50 PM, Bob Blick wrote:
> I was thinking about someday making a simple device for quick review of a=
 few automobile parameters. I'm not doing any real racing anymore but I do =
still autocross and the occasional hillclimb, so the races are either under=
 a minute or under three minutes. Actually a lap on most road courses is us=
ually under four minutes. Basically I am not the kind of person who pores o=
ver data or race videos or keeps a log book of tire temperatures. I don't e=
ven really care about improving my driving that much, but I do care about t=
he car, so after a run I'd like to look at data from the last lap and see h=
ow things went. Stuff like air/fuel mixture, manifold pressure, engine RPM,=
 maybe throttle position. I'd have some display I can scroll through. This =
is not from OBD2 or a diagnostic port, I'd be grabbing data mostly directly=
..
>
> My car is not running right now, so it's not something I'm likely to do a=
nything about until next year, if ever. Previous datalogging gadgets I have=
 used or built just haven't been any fun so it'd be nice to do something si=
mple that's more of a scrolling display of the last minute.
>
> Obviously one can sample data real fast and store all of it. That uses lo=
ts of memory. Sampling or averaging say once per second doesn't use much da=
ta, but can miss quick little events. So I was thinking about storing just =
the peak minimum and peak maximum once a second. Sample fast, store and res=
et peaks once a second. It only uses twice as much memory as sampling once =
a second, but it'll catch any weird glitches.
>
> Thoughts?
>
> Thanks,
> Bob

--=20
John Ferrell W8CCW
    Julian NC 27283
  It is better to walk alone,
than with a crowd going the wrong direction.
                   --Diane Grant


--=20
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