Actually looking at the pic I think they finally came to there
senses and put it back where it belongs. I think I like keys on it
better than the 32s II which was a really good pocket calculator.
I absolutely hate the 33s. Bad keys (have to watch to make sure it
takes the press), lousy layout, wrong size, etc.
I still think that the 32s II was the best general purpose pocket
sized calculator they've made. If they'd just constructed it better.
Mine here by the computer is going flaky again. I'm going to have to
take it apart and clean the contacts on the flexible strip again (and
they didn't exactly make it to be taken apart).
Doesn't look like they're selling in the US yet.
The LCD displays are usually connected to the PC board with "Zebra
Strips", which are alternating layers of conductive and non conductive
rubber. The surface deteriorates with time, so you remove them and
clean the ends, as well as the PC board and display with pure Isopropyl
alcohol on a Q-tip.
If I get time to do the job I'll take pics. The main difficulty is
removing the keyboard cover without tearing it up. You'll have to pry
it up so that you can get to the melted posts through holes connection
that is between the 2nd and 3rd key rows from the bottom. The rest is
easy to figure out for someone like you.
At least the location on this one is a lot closer to the older models my
hands are trained to use. I'm forever miskeying stuff on an HP33s. Looks
like the decimal point symbol is a lot easier to see on the new 35s is a lot
easier to see on the 33s as well.
CMOS not NMOS. NiAH not NiCAD. Solver - nice. more memory, ....
and it works.
My HP 28C is still going well - this last battery set was fresh - lasts
a long time. Prior sets were likely shelf dead and then sold.
I have a software for my Sony Clie / PDA - MathU Pro - an HP
programmable calculator. They make PDA replacements.
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Life; NRA LOH & Endowment Member, Golden Eagle, Patriot"s Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
Hmm ... I thought that was what the 'C' in the model number of
the 15C *was* -- CMOS. Mine runs for years on three SR357 cells, as
does the companion 16C (computer math version). And the two of them
take up less space together than most of the others did, except perhaps
my wife's 25.
And to keep it metal-related, I use a spare 15C in the shop,
where it lives in a Ziploc baggie (facing backwards) to protect it from
oil and swarf, let allow it to be used.
I'm pretty sure the 'C' in HP calculator designations means it has their
'continuous' memory feature. In other words, it doesn't forget the stack
and other register contents when shut off. (As far as I'm concerned,
'off' is really very low current draw 'stand by' mode.)
BTW, I also had 32SII keyboard issues... otherwise, it was a GREAT
If you have a 16C, sell it and retire. I'm not kidding... take a look at
what they're going for on e-Bay...
According to Erik :
[ ... ]
But how would you implement this other than with CMOS (at least
for the memory), especially given the relatively tiny batteries used?
Sure -- but I think that implies CMOS as well to implement that
Only if I can get a functional replacement. I use it too much
to get rid of it.
And I am *already* retired -- though extra income would be nice. :-)
I've been usin my 10C for YEARS and still on the orig batterys.
I had a 21 along time ago which did have the keys quit working.
Just recently got one (it's at school now so don't remember the
number) but it need batterys already.
"Don't use a calculator with an equal sign" :-)