I'll work on it but I only have another day at my remote outpost in British
Columbia. When I leave the problem goes away. Getting the voltage isn't
necessary. It just would be nice to see it from a thousand miles away.
Thanks for your input.
Peter
On Sat, Feb 21, 2015 at 1:42 PM, Jan Kandziora <[email protected]> wrote:
> Am 21.02.2015 um 21:21 schrieb Peter Hollenbeck:
> >
> > The higher the value the lower the output.
> >
> This usually means there already is a voltage divider (or at least a
> parallel resistance) in the measurement device and you are superposing
> another. You could measure it and calculate the outer pair, but if 1k
> gives you the right reading, stick with it.
>
>
> >
> > I don't get it and doubt I ever will.
> >
> Chances are your input isn't properly filtered, so you are measuring AC
> noise on the line. You mentioned an inverter, which is prone to produce
> a lot of noise on both its output *and* input.
>
> Try this circuit
>
> 12V in )---------+------------------( 12V out
> |
> |
> )
> ) 100 windings on a iron core
> ) (a rusty nail suffices)
> |
> |
> <
> > 1k
> <
> |
> +-------+---------(---->
> | |
> < === 1µF to measurement device
> > 1k --- 10V
> < | .--(---->
> | | |
> GND in )---------+-------+------+--( GND out
>
>
> Kind regards
>
> Jan
>
>
>
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