From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2002-10-01 13:11:22
On Mon, Sep 30, 2002 at 10:00:37PM -0400, William Levak wrote: > You could connect 2 in series and run them off 220. I'm afraid not, since according to Ville, the motor does not run continuously, but only when other keys than the numbers are pressed. There is some sort of a counter that powers off the motor after a few rounds. > If left long enough, they will also eat away the battery contacts in > your equipment. I guess 29 years weren't long enough. :-) I was lucky that in both calculators that had those batteries inside, the batteries were soldered to wires. Yes, I have learned my lesson about the corrosiveness. I got a nice orange cased LED calculator made in East Germany in the 1970s or early 1980s (I have the original receipt, but I can't check it right now). It has a battery compartment for four AA-sized cells. The copper plates in the compartment were green, and scratching them clean didn't help much. When I left a set of rechargeable NiCd batteries in there for a few weeks, their terminals started to corrode as well. It's a bit hard to replace the metal plates, as they are mounted to the plastic case just by melting the plastic. Luckily also that calculator can be run with an AC adapter. Marko Message was sent through the cbm-hackers mailing list
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