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What calculator do you use ?

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Rerouter:
a more recent fx-82AU mainly becuase it has a rather deep memory and its functionality covers effectivly my understanding of mathmatical formula, (i am one of those people that become confused with integral representations of plain algebraic equations)

JuiceKing:
Does the HP 45 emulation include the "secret" stopwatch feature? Does it keep lousy time like the real thing?

There are always plenty of the old LED-based HP calculators on eBay, and when I was interested in these things I noticed that occasionally buyers made  out like bandits when there was a dearth of bidders on a common model in mediocre condition. The original batteries are inevitably shot, but there is a vendor on eBay who thoughtfully supplies new nicads in the right shape as a replacement. Leaked batteries are these old calculators' worst enemies, so insist on seeing an interior photo before bidding.

There are some very detailed and interesting papers from HP about the workings and engineering of the original 35 and 80, and on YouTube, a superb interview of Tom Osborne.

You are warned that reading these papers may create an irresistible desire for one of these in your hand,


--- Quote from: PA4TIM on August 21, 2012, 08:53:35 am ---After the hint from juiceking about calcultor apps I found a very nice app from a HP45s for my lumia 900


I would love to have on old HP with the point-led display. But i think they are rare collectors items by now (and need a lot of batteries)

Fred

--- End quote ---

PA4TIM:
Yes, it has the hidden timer and you can choose someting that as to do with original speed or time or so bu I did not know what they meant because I have no compare.

I never buy or look on ebay, this is as self-protection ( i allready have to much gear and I can not make bids, if someone askes no price on the dutch craigslist equivalent i do not react, even if i want the instrument) i have one GR bridge from ebay but a friend negotiated and bought if for me.

I will look the osborn movie. There is a piece about the 35 in an interview with hewlett or pachard, they ask in a meeting about is if this could be commercial because the price and Hewlett said something like ; if there is a computer I can take with me in my pocket I would buy it, and i I would there must be others. They named it calculator because a computer was in those thays synonim with IBM.

robrenz:

--- Quote from: PA4TIM on August 22, 2012, 06:26:46 am ---Yes, it has the hidden timer and you can choose someting that as to do with original speed or time or so bu I did not know what they meant because I have no compare.

--- End quote ---

Original speed means the calculations will take as long as they did on the original calcualtor running its painfully slow processor.  Otherwise they happen instantaneously

T4P:
Some emulators i used actually emulate the calculator so well it feels like the original processor's and ram's in  :-\
Well at least the TI-86 emu i have didn't emulate the processor either, only the 96KB

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