fedora-list Digest, Vol 24, Issue 231
Tim
ignored_mailbox at yahoo.com.au
Fri Feb 24 09:27:33 UTC 2006
On Thu, 2006-02-23 at 23:20 -0800, Tod Merley wrote:
> The technical specifications of a typical 2016 battery can be found
> at:
> http://www.kodak.com/eknec/documents/f9/0900688a8019d7f9/KCR2016.pdf
> A couple of interesting things here. One is that your 100K resistor
> will load the poor little critter down to about 2.8 volts at room
> temperature (see the operating voltage verses load resistance curves)
> and a second is that typical "skin resistance" I have measured often
> in the 100K range (it varies from about 2M on very dry tough skin down
> to a couple of K if people are sweating) and that cheap meters I have
> seen have "ohms per volt" rateings of as low as 1K. So on the three
> volt scale the meter would load 3k making the measurement.
Still using an analog meter? ;-) Mine lasted many years, and a few
falls from towers onto concrete floors until it finally gave up the
ghost. During that time I had two digital multimeters die all by
themselves, and they were treated very carefully (they cost a lot!).
Just a note about those button batteries: If you handle them, your
finger grease can provide enough of a current path to prematurely
flatten the cell. Try to avoid putting your fingers across the
terminals, and wipe them clean if you do (the terminals, not your
fingers - well wipe them clean too before you eat). ;-)
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