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, email@example.com wrote: > Message-ID: <3D979745.95D6F2A@odyx.com.au> > Date: Mon, 30 Sep 2002 10:13:57 +1000 > From: Matt Boland <firstname.lastname@example.org> > Organization: Odyx Corporation Pty Ltd > References: <3D934CFC.email@example.com> (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
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