DIY-EGOR interface

[Seth]

Ok.

I was thinking of an in the car interface, not an ecm/ Data acquisition
interface. I see where you are coming from now.

Bruce Plecan wrote:
> 
> All that really matters to me is making it ecm friendly.
> Having a 0-1v output with the 14.7 at .44 is the trick.
> 
> If you also look at the output it isn't a linear response.
> If you want to run a total of 4 of the 10 elements you can beging to cover
> the interesting areas for a specific car, but to get a universal type system
> the LCD gets reall attactive.
> 
> To get the most out of this will take some form of data logging.  Why just
> not do the interface once so that it's compatable with all the logging stuff
> folks already have?.
> 
> Bruce
> 
> > Ok, should be doable, will involve a bit more electronics to bias it to
> > start at say -3v and go to ~+2V. Would this be a useful display? It
> > certainly seems easier to read as a boost gauge than a numeric 60mm
> > gauge. I bet it might be easier than reading a LCD, unless the LCD
> > refresh rate is slower than 1hz.
> >
> > -Seth
> >
> > Bruce Plecan wrote:
> > >
> > > You'll notice the range for the IC shown is 0-1v
> > > the output of the WB, is in the range of -1.x to +.5
> > > So the WB output needs *shifted* to an all positive range.
> > >
> > > From: "Seth" <sethea at mediaone.net>
> > > > This is something less than what you would probably ultimately want
> for
> > > > an interface, but it is easy enough
> > > > to build. It's basically a copy straight out of the National
> > > > Semiconductor LM3914 datasheet. I have been planning on making a
> surface
> > > > mount board for a smaller boost gauge, and I have it set to read 0 to
> 5V
> > > > in, but 0 to 1V would be an easy modification.
> > > >
> > > > my website from when I was considering making 30 element LED
> > > > boostgauges... the display would work for DIY-EGOR, if I understand
> > > > things correctly.
> > > >
> > > > http://people.ne.mediaone.net/sethea/MkIVboostgauge.html
> > > >
> > > > it is a fair sized jpeg so it might take a bit of time on a modem
> > > >
> > > > the .PDF file of the schematic for the display as set to 0 to 5V via a
> > > > voltage divider
> > > >
> > > > ftp://ftp.diy-efi.org/incoming/boost%20gauge.pdf
> > > >
> > > > or
> > > >
> > > > ftp://ftp.diy-efi.org/incoming/boost gauge.pdf
> > > >
> > > > I guess the %20 is some sort of placeholder???
> > > >
> > > > If this is of interest or could help, just shout. Again, I was going
> to
> > > > do a surface mount version of the PCB so I could get a nice looking
> > > > (small) Heads Up Display for boost inside or atop the instrument pod
> on
> > > > my VW.
> > > >
> > > > -Seth
> > > >
> > > >
> > > >
> > > >
> > > > Bruce Plecan wrote:
> > > > >
> > > > > There are 4 in use that I've heard of.
> > > > > I've heard of about that number that are under construction, and a
> > > number of
> > > > > folks saving for sensors, and or saving them for winter projects.
> > > > > Bruce
> > > > >
> > > > > > Bruce-
> > > > > > I didn't mean vaporware as in not existing. Sorry for the
> confusion, I
> > > > > > was having a difficult time finding the words to say what I meant.
> > > What
> > > > > > I meant was, there aren't many of these built (correct me if I am
> > > wrong)
> > > > > > and it seems everyone wants to add features. I never meant to
> imply
> > > that
> > > > > > it either didn't work or that there working units.
> > > > > > Sorry for the confusion!
> > > > > > Seth
> > > > >
> > > >
> > >
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