Re: Commodore 202 and 207

From: Marko Mäkelä (
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.


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