RE: 110->240 volt conversion

From: Bo Zimmerman (
Date: 2002-09-26 20:59:52

I can't help you on your power conversion questions, but I can tell you that
the internal DB25 female port inside the computer *IS* the RS232 port.

And yes, An SP9000 in an SK case would be awesome.  I suppose you'll get
those keys in there too, right?

When you get the SP9000 going, you'll need to download the disks from my
site and take a look at the APL interpretor.  It is the strangest, least
friendly language I have ever seen in my life.  It's MUCH worse than C.  It
is somewhat worse than LISP.  It is WAY worse than PILOT.  It even seems to
break some of the rules we take for granted on screen editors.  For
instance, if you cursor back to a previously typed character and hit a new
character, you expect the previous character to be replaced by the new one.
In APL, that's not always true....

- Bo

> -----Original Message-----
> From:
> []On Behalf Of Marko Makela
> Sent: Thursday, September 26, 2002 1:08 PM
> To:
> Subject: 110->240 volt conversion
> Today I received a bunch of Commodore calculators and a SuperPET 9000
> from George Page via Bo Zimmerman.  (Thanks, Bo!)
> 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.  In the 202, there is a capacitor next to
> the motor; the 207 (a downgraded version of the 202) seems to be
> equipped with a smaller motor and perhaps no capacitor.  What do you
> think, could I run these motors somehow off 220 volts?  It should be
> noted that some functions of the machines need quite much mechanical
> power.  Especially returning the cursor to the beginning of the line
> required so much torque that I almost thought I'd break the mechanism
> when I manually rotated the motor axis.
> The Commodore US*1 calculator is very weird.  It has a 7-segment
> numerical display (possibly a fluorescent one) and at least one IC in an
> all-golden package, but it appears to run directly off 110 volts, or at
> least without any transformer.  Maybe this one would run on a cheap
> transformerless 240->110 volt converter (one based on a diode), as it
> probably won't need that much current.
> Then there's the SuperPET 9000 with a 320902-02 power supply.  Can it be
> easily converted to 240 volts?  If not, I think I can mount the power
> supply of my 8032 there.  Hmm, does anyone have a SuperPET 9000 in a
> 8032-SK case? :-)  Oh, and is the D25F connector inside the SuperPET, on
> the left-hand side of the daughter board, the RS-232 connector?  I saw a
> hole on the left-hand side of the case; maybe you are supposed to run an
> RS-232 cable to the internal connector through that hole?
> I'll have more questions in a few weeks, when the B128s arrive per
> surface mail. :-)
> 	Marko
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