DIY-EGOR interface

[Seth]

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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