From: One Stone
X-Mailer: Mozilla 4.75 [en] (Win98; U)
Subject: Re: Electronic Auto Dashboard
Organization: Chariot Internet - http://www.chariot.net.au
Date: Sun, 24 Nov 2002 02:44:53 +1030
NNTP-Posting-Date: Sun, 24 Nov 2002 03:12:14 EST
Gary Tait wrote:
> On Sat, 23 Nov 2002 12:40:46 GMT, "Ed Price" wrote:
> >Would anyone have any pointers about the construction of your own custom
> >digital dashboard? I have an off-road vehicle (from the pre-electronic era)
> >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 is
> >to salvage a dash from a junkyard and customize as desired. Most of the
> >instrumentation is pretty simple (digital voltmeter with various sensors),
> >but an electronic odometer is more of a challenge.
> >Since after-market trip computers have been available for over 15 years, I'm
> >surprised that I haven't been able to find a magazine or web reference about
> >building your own digital odometer? Any suggestions or directions?
> If you have a driveshaft pulse, you can count them do the math to
> figure how many pulses turn the wheel once, and how many wheel turns
> complete 1/10th a mile/Km
You will need some non-volatile memory to save the accumulated milage
when power is off. A small flash device would suit. Commercial units
will be very expensive. You can build one for yourself fairly cheaply.
The most expensive part is the graphics display. Even monochrome can be
over $100. If you are able to build the electronics, and write some code
I may have some old ECU designs around that can easily be converted to a
display. Character LCD or Graphics panel.