o2 sensor

[Robertson, Nigel]

Geoff,

One LM3914 bargraph driver set up to measure 1 volt.  10 LEDs each LED
represents 1/10 = 0.1 volts.  If you cascade two LM3914 devices and set it
up to measure 1 volt you will have 20 LEDs therefore each LED represents
1/20 = 0.05 volts.  Hence better resolution.

Get hold of a copy of the data sheet of the LM3914 off the web.  It shows
you how to connect it up in various ways.

Nigel R

> -----Original Message-----
> From:	Geffro [SMTP:geoffsue at one.net.au]
> Sent:	14 June 1999 10:30
> To:	diy_efi
> Subject:	Re: o2 sensor
> 
> 
> 
> >
> >Though you can cascade two, three, or four for more resolution if you
> >must.  I'd offer a schematic but its been ages...  I think Radio
> >Shack's "Electronics Experimenter" book (orange cover) has a cascaded
> >3914 schematic in there.
> 
> >Frederic Breitwieser
> >Bridgeport CT 06606
> 
> Would you mind explaining this for a beginner?
> Cheers
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Geoff Richards
> mha at operamail.com
> My learning curve seems to start way over my head
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> 
>