DIY-EGOR interface

[Bruce Plecan]

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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