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[DPRG] Circuits for Panel Meters

Subject: [DPRG] Circuits for Panel Meters
From: Ed Paradis legomaniac at gmail.com
Date: Mon Nov 2 09:40:43 CST 2009

Thanks Anton.

After thinking about the problem more, I was able to solve it with two
zener diodes and some resistors.  It remains to be seen if I can
actually trim it well enough to be as nice as the circuit you posted.
At the very least, I can empirically determine the voltage/position
relationship and draw my own scale for the meter.

I'll post a write up, since this is evidently not well documented on the web.


On Mon, Nov 2, 2009 at 9:20 AM, Anton Olsen <anton at antonolsen.com> wrote:
> I ran across this the other day when I was looking to monitor a 12V
> battery with an old 5V meter I had in the junk bin.
> http://www.solorb.com/elect/solarcirc/xsvmeter/index.html
> Anton
> On Mon, Nov 2, 2009 at 10:07 AM, Ed Paradis <legomaniac at gmail.com> wrote:
>> Hi Everyone,
>> I remember a while back at an RBNO there was mention of a site or
>> article giving the run down on some useful circuits for using panel
>> meters.  I asked Google and searched the list archives with no hits.
>> Anyone remember something like that?
>> I'd like to come up with a simple analog circuit (I imagine using
>> zener diodes and resistors) that lets me take standard 0-50uA meter
>> and scale it to something weird, like 10 to 15 volts.
>> I don't want 0 to 15 volts, that is trivial.  I need to figure out how
>> to specify the maximum and minimum voltage range.  I was hoping
>> someone had done the leg work for me already. :)
>> Ed
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> --
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