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From: "Ed Price"
Subject: Re: Electronic Auto Dashboard
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Sat, 23 Nov 2002 20:25:24 GMT
NNTP-Posting-Date: Sat, 23 Nov 2002 15:25:24 EST
Organization: Cox Communications
"Marc H.Popek" wrote in message
> Why not make the Analog gauge that you have look good by:
> add any missing units
> make sure all work
> I kinda like the analog needle gauge anyway :-)
> "Ed Price" wrote in message
> > Would anyone have any pointers about the construction of your own custom
> > digital dashboard? I have an off-road vehicle (from the pre-electronic
> > that currently has the basic mechanical gauges, but I am re-building the
> > entire dash console, so now would be the time to put in something fancy.
> > I have found a couple of sites, but the cost is well over $1000. Even a
> > small, generic LED dash panel goes for over $300. Perhaps the best route
> > to salvage a dash from a junkyard and customize as desired. Most of the
> > instrumentation is pretty simple (digital voltmeter with various
> > but an electronic odometer is more of a challenge.
> > Since after-market trip computers have been available for over 15 years,
> > surprised that I haven't been able to find a magazine or web reference
> > building your own digital odometer? Any suggestions or directions?
> > TIA,
> > Ed
Marc & Gary:
Well, discrete aftermarket gauges are my back-up plan. The existing gauges
got pretty trashed from sun & water damage under the previous owner, so
rebuilding them is not very attractive. An analog speedo still looks good,
but I am concerned about how close I can match a commercial mechanical
speedo gauge to the mechanical drive off the trans (as I have no idea about
the ratio of the drive gears). An electronic speedo can compensate for all
Once you have a digital axle-turns counter signal, you can then work toward
an electronic odometer. I am looking for some inspiration in the area of
counting, scaling and storing that data. Maybe a microprocessor is the best
way to do it. But I have to find a comfortable balance of build / buy for
the electronics (just as with the mechanicals, where I certainly don't
intend to machine my own ball bearings). I don't think I want to start the
project at the level of coding a Basic Stamp system.
Although I would really like to have a caution-annunciator panel, I don't
think I really need any alpha-numeric matrix displays. That simplifies the
displays, since I can use multi-segment LED's and discrete LED's.
Thanks for your thoughts.
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