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Date: Tue, 15 Apr 2014 22:38:08 +0100
From: Richard Bown <richard AT g8jvm DOT com>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] printed meter shunts
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On Tue, 15 Apr 2014 17:14:15 -0400
Nathan Stewart <therealnathanstewart AT gmail DOT com> wrote:

> No - I have not, but I do have a 5A (20A inrush if not limited)
> current monitoring problem coming up, and another idea kicking around
> for an active load where I'd need to monitor about 5A or so with
> minimal influence on a 4 Ohm nominal speaker load. So I'm interesting
> in what happens here.
> 
> I was planning to use an ACS712ELCTR-20A-T (it's 6.3VAC sitting about
> 100V above ground - so that fancy doodad kills a couple birds with
> one stone) but it's also somewhat spendy.
> 
> How about something like DigiKey 408-1615-2-ND - 5m Ohm, 3W, 2512W,
> that should take care of your SMT issue. (When I saw TO220 I figured
> you were looking for a through hole device).





Hmmm, you've got me thinking Nathan, 2512 package directly on the pcb
may get warm , but if mounted piggy back on a high value resistor or
cap with the same footprint may well do it, 

Thanks
> 
> 
> On Tue, Apr 15, 2014 at 4:31 PM, Richard Bown <richard AT g8jvm DOT com>
> wrote:
> 
> > On Tue, 15 Apr 2014 15:20:54 -0400
> > Nathan Stewart <therealnathanstewart AT gmail DOT com> wrote:
> >
> > > Why does it need to be TO-220? 3W wire shunt is about 50 cents.
> >
> >
> > Have you tried measuring 0.005 Ohm with shunt wire ?
> >



-- 
-- 
Best wishes /73
Richard Bown
Email : richard AT g8jvm DOT com   
HTTP  :  http://www.g8jvm.com
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