10 LED O2 monitor

[Mathieu Blais]

hi steve,

    I checked with nsc and they only seem to sell it if I buy 20 or more,
and I don't need that many!  That nsc place seem to be only selling at
companies, am I correct?  I also checked jc whitney and I can't find them
listing somekind of o2 monitor.  Can you give me your idea, like I really
don't know nsc, and I'm brand new on here.  Thanks.

    Math Blais
    fireb76 at videotron.ca

----- Original Message -----
From: "steve ravet" <sravet at arm.com>
To: <gmecm at diy-efi.org>
Sent: Tuesday, November 07, 2000 5:40 PM
Subject: Re: 10 LED O2 monitor


> The 3914 chip used basically uses a 10 step resistor divider network and
> 10 comparators to decide which segment to light.  The default input
> range is 0-1.2V, but that can be changed to anything "reasonable" like
> 0-5V, etc.  So the answer is yes, it will work with any circuit that has
> an analog output.  I "think" both flavors of UEGO have an output voltage
> in the 0-1V range so this circuit should work pretty well out of the box
> with either one.  If not the app notes at National have details about
> changing the input range.  For more info go to www.nsc.com and search
> for LM3914.
>
> I think JC whitney and others sell basically this design in the $20
> range, so unless you like building stuff you might just consider buying
> one.
>
> --steve
>
> "Romans, Mark" wrote:
> >
> > Any way to make this work with an EGOR?
> > ----- Original Message -----
> > From: "steve ravet" <sravet at arm.com>
> > To: <gmecm at diy-efi.org>
> > Sent: Tuesday, November 07, 2000 1:21 PM
> > Subject: Re: 10 LED O2 monitor
> >
> > > Try this link:
> > >
> > > http://diy-efi.org/diy_efi/projects/O2_LED/O2_LED.html
> > >
> > > Be warned that these types of meters are of limited use.  They'll tell
> > > you rich/lean but that's it.  If you connect it to an EFI car you'll
be
> > > able to see the ECM command the mixture back and forth across stoich.
> > >
> > > --steve
> > >
> > > > Mathieu Blais wrote:
> > > >
> > > > hi,
> > > >     I'm really brand new to tbi injection, seems like I'll really
get
> > > > into programming prom and modifying prom aswell, I just found the
> > > > diy-efi www and I was reading the papers. I found out that there is
> > > > somewhere a GN Type tech area where I could maybe find the schematic
> > > > on how to build the 10 LED O2 monitor. I would really like if
someone
> > > > can tell me where I could find that, because the link doesn't work.
> > > > Thanks all
> > > >
> > > > Math B
>
> --
> Steve Ravet
> steve.ravet at arm.com
> ARM,Inc.
> www.arm.com
> --------------------------------------------------------------------------
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