AA-sized conductor (fake battery) wanted
D Yuniskis Inscribed thus:
On 1/14/2011 6:26 AM, baron wrote:
D Yuniskis Inscribed thus:
On 1/13/2011 1:46 PM, Baron wrote:
D Yuniskis Inscribed thus:
On 1/13/2011 4:24 AM, baron wrote:
Eldor Inscribed thus:
Hello all NG
I am looking for a fake AA battery, i.e. a conductor of the same
size, so that I can put it in an AA battery holder and have a
lower voltage (N-1 x 1.5V) . Actually I want multiple of them so
that I can make a "configurable voltage" battery.
I have looked around but I can't find it. Does anybody know any?
Alternatively I could look for a battery which can be charged at
various voltage levels, but it needs to hold a significant
charge at any voltage level. I don't think it exists.
Thanks for any help
Whats wrong with a piece of rolled up cardboard ?
Cardboard isn't a very good conductor at low voltages :
Sorry ! My brain fart :-(
I meant to write "Whats wrong with a piece of alloy foil wrapped
over rolled up cardboard ?"
Wrapping the foil might be tricky -- especially if it
*is* "foil" -- since you want a durable and reliable
contact surface yet can't really tolerate lumps, bumps,
etc. "Shrink-wrap-aluminum"! Now *that* would be
an idea! : (not "shrink-WRAPPED-aluminum")
I've actually used rolled up cardboard and wrapped aluminium cooking
foil round it, folding the ends over to make contact surfaces. It
works quite well. I imagine that its current carrying capacity would
be quite low.
The ideal would be to turn a length of copper dowel to
the correct profile and then encase in shrink wrap.
But, I suspect the OP doesn't have access to a lathe
(though many people *have* lathes so "asking around"
could be an option -- note that the profile is probably
published as a standard someplace so it's just a matter
of getting someone to give you 3 minutes of time on a
lathe).
Actually a hacksaw and a short length of 0.5" or 13.0mm bar/rod cut
to 2" or 51mm long would do !
My comment was intended more as "tongue-in-cheek" (I have a
friend that I *never* ask for things like this as he *would*
turn something on a lathe for me and I often end up embarassed
at the "excessive quality" of his solution! : )
Us mechanical engineer types take great pride in our hobbies ! :-)
Some batteries (against which the "dummy" may mate) require
the little "nub" on the + end to ensure contact. Likewise,
some battery holders "guard" the + terminal with a bit of
raised plastic to protect against a battery installed backwards.
(i.e., a "flat surface" -- like the - terminal -- won't connect)
Ah ! In that case you would need to turn it to produce the pip on one
end.
--
Best Regards:
Baron.
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