See what you've driven me to?

[roccit_53 at scirocco.cs.uoguelph.ca (C Boyko)]

I still need to drive it, but it rises just barely from rest when cold
(still in the width of the first narrow white line), and seems to go about
a quarter of the way up when I dip (a spare) sensor into water that was
boiling in the house but has lost some heat on the trip out, likely 80C or
so. So we'll see what it does in real life. I just want it to register
something useful, not too concerned about where it actually reads as long
as it isn't pegged at max. This is with 1X100ohm plus 5X10 ohms soldered
up. That wont' live for long in the engine bay, but it'll test the theory 
effectively. I'd drive the car, but in the meantime I have five other
things pulled apart. What a shock.
Cathy

On 10:05 pm 10/22/07 "Allyn" <amalventano1@xxxxxxx> wrote:
>
> Yes, I agree, but to get the ranges to match a divider  network may
> be needed (i.e. if the meter starts at 0 but the sensor was meant  for
> a meter starting at 100).  The divider would allow shifting that  low
> point...
>
> Al
>
>       From: julie@xxxxxxxxxxxxxxxxxx    [mailto:julie@xxxxxxxxxxxxxxxx
> om]
> Sent: Monday, October 22, 2007    4:26 PM
> To: Allyn; roccit_53@xxxxxxxxxxxxxxxxxxxxxxx;    scirocco-l@xxxxxxxxxx
> rg
> Subject: Re: See what you've driven me    to?
>
>
>
>   Allyn, the meters are ameters. a resistor in series (the sensor)
> limits the    current there by moving the meter according to the
> amperage drawn.  At least thats how the mki and MKII meters work
>
> > -----Original    Message-----
> > From: Allyn [mailto:amalventano1@xxxxxxx]
> > Sent:    Monday, October 22, 2007 01:04 PM
> > To:    roccit_53@xxxxxxxxxxxxxxxxxxxxxxx, scirocco-l@xxxxxxxxxxxx
> > Subject: RE:    See what you've driven me to?
> >
> > Cathy,
> >
> > If you can    get me any kind of specs on both ends of what you're
> > trying to connect, I'll    whip you up a circuit that interfaces
> between the two. It will likely    require a voltage divider of some
> > sort, as opposed to just one resister in    series.
> > Al
> >
> >>  -----Original    Message-----
> >>  From: C Boyko    [mailto:roccit_53@xxxxxxxxxxxxxxxxxxxxxxx]
> >>  Sent: Sunday, October    21, 2007 10:13 PM
> >>  To: scirocco-l@xxxxxxxxxxxx
> >>  Subject:    See what you've driven me to?
> >>
> >>  Yeah, it's become a    geek-fest in my garage. I just got in
> >>  from trying to get my dash    water temp guage to work. The
> >>  problem is the ABA sensor and the    MkI gauge don't play nice,
> >>  the guage pegs at hot. So I'd tossed    in the largest resistor
> >>  I had and that pegged it at rest    position. Which it never
> >>  moved from. So something between nothing    and 1000 ohms is
> >>  right. So I ask the kid (he's gotta be good for    something),
> >>  he's got a potentiometer handy, likely from a   helicopter. So
> >>  here I am after twisting the dial and boiling    water to
> >>  immerse a spare sensor in, and it's still not perfect,    but
> >>  I'm closer. 150 ohms seems to be what's called for. Of course
> >>  that means adding up about six resistors in series. When I
> >>  got the 16V a few years back, I didn't even know how to
> >>  disconnect the battery cables. The other projects today were
> >>  washing three cars (Bug/Klaus/Mustang, don't ask), getting a
> >>  spare engine and tranny into a spot where I didn't keep
> >>  knocking my shins on them, and figuring out fitment for
> >>  battery relocation and the cutoff switch to go with it. All
> >>  the piddly shit takes so much time! It was a beautiful fall
> >>  day for it though. Hope you all had good weekends.
> >>     cathy
> >>
> >>
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