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From: edh@sqa.dsg.ti.com (ed humphries (ASOC))
Newsgroups: sci.electronics,rec.radio.amateur.misc
Subject: Re: Nicad battery "tester"(?) wanted
Message-ID: <1991Jun20.165115.27593@axis.dsg.ti.com>
Date: 20 Jun 91 16:51:15 GMT
References: <1991Jun19.181233.12893@sequent.com>
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Organization: Texas Instruments, Austin, Tx.
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In article <1991Jun19.181233.12893@sequent.com> washer@sequent.com (Jim Washer) writes:
>With all the discussion about nicads, nicad capacities, nicad memory,
>nicad charging techniques, nicad ......, I thought it might be nice to build
>a device that would give me some quantitative measure of a batteries
>capacity.
>I thought that building a circuit that would draw some fixed current,
>until the battery voltage dropped to some pre-selected value would suffice.
>Comments? Flames? Circuits?
> - jim KG7HH 1-503-578-3171

CQ magazine had a very nice article with a circuit a few months ago. This
months issue had the circuit (labeling) correction I've been expecting. I
am planning on a modification to incorporate a meter (I like visual indi-
cators myself). Also, I'd like mine to be adjustable (for 9v packs as well
as 7.2v).

If there is enough interest, I'll post the (ascii version) circuit. 
But not till after Field Day! :-)
--
Ed Humphries                Texas Instruments, Inc. 512-250-6894
N5RCK                       Internet ed.humphries@hub.dsg.ti.com