Denny Esterline <desterline@gmail.com> writes:
> Depending on how much you're willing to modify the device, I'd consider
> adding a new (higher voltage) cell and a voltage regulator.
> Shouldn't be too hard to find a suitable low quiescent current regulator=
=20
> to
> supply the reference voltage.

	That is an excellent suggestion and has gotten me to
thinking with one possibility being to=20
rob a few more mills from the 9-volt battery that runs the
chopper.  There is one switch that turns power on and off to the
whole meter and I want the new battery and regulator off when the
rest of the meter is off to avoid draining the reference battery.

	A small DC-DC converter that is transformer isolated and
capable of a couple of milliamps at most might also do the job.
The one rule is that there should be no path back to any of the
other batteries or they wouldn't have designed the circuit the
way they did.  1.3 volts has to magically appear where once a
battery sat.

	Again, many thanks.

Martin McCormick
--=20
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