From: Marko =?ISO-8859-1?Q?M=E4kel=E4?= (marko.makela_at_hut.fi)
Date: 2002-09-30 12:28:59
On Mon, Sep 30, 2002 at 11:01:11AM +0200, owner-cbm-hackers@cling.gu.se wrote:
> Message-ID: <3D979745.95D6F2A@odyx.com.au>
> Date: Mon, 30 Sep 2002 10:13:57 +1000
> From: Matt Boland <mattboland@odyx.com.au>
> Organization: Odyx Corporation Pty Ltd
> References: <3D934CFC.90301@hut.fi>
(This message was bounced due to unrecognized From: address.)
> > Most calculators run at a 9-volt battery, which is no problem. Two of
> > them (the Commodore 202 and 207 adding machines) are mechanical, driven
> > by a single electric motor.
> If they run off a 9 volt battery, couldn't you run them off a 9V
> regulated plug pack ? Some of these will handle up to 1 amp, which
> sounds sufficient...
Sorry that I was a bit ambiguous. The 207 and the 207 run directly off
110 volts. Ville Muikkula has a 115/230-volt 202, and he has been quite
helpful.
Yes, I've successfully operated all but four calculators (three that
need 110 volt power, and one for which I don't have a suitable power
connector yet). Two calculators contained batteries, which had leaked
from the (+) side. One of them used two AA-sized cells, while the other
used two batteries something like 4/3 times the length of AA, apparently
rated at around 3 volts, or perhaps 2*1.2 volts. I desoldered these
before applying power from a switching power adapter.
I'm a bit distrurbed by the high-pitch noise I get from some calculators.
Maybe it is a transformer for the tube-based 7-segment display; does anyone
know?
(Is there a reason why the (+) side of all four batteries leaked, or is it
just that the batteries might have been built like a bottle whose cap the
(+) terminal is, and the easiest escape for the interior is the cap? Has
anyone seen a leak from the (-) side?)
Marko
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail 2.1.4.