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What calculator do you use ?

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HLA-27b:

--- Quote from: slateraptor on April 18, 2012, 06:04:45 am ---
--- Quote from: Lightages on April 18, 2012, 02:38:39 am ---OK, enough of these wimpy "calculators". Its time for the real men to step up and use one of these. Just two of my sliderule collection. I have 53 of different types. These two are specialty electronics rules.

--- End quote ---

Nice. I can only imagine the look on a professor's face if a student were to bust one of those out in the middle of an exam. :P

--- End quote ---

This is exactly what re-kindled my interest in mathematics :D  I damn needed to learn how these worked, so found an emulator program, found a book and started slidin' right and left. As someone who was exposed to slide rules after being exposed to graphing calculators I might say that the slide rule is by far the most intuitive and most inspiring math tool of them all. Just for this reason alone it is worth learning how to use one.


Here is a free slide rule emulator. Thanks to the NZ guy who wrote it.
http://homepages.slingshot.co.nz/~timb3000/

Here is a virtual Pickett N909-ES Slide Rule
 http://www.antiquark.com/sliderule/sim/n909es/virtual-n909-es.html
(Hint: reverse the rule and try out the unit conversions  ;))

Lightages:

--- Quote from: HAL-42b on April 18, 2012, 08:30:21 am ---This is exactly what re-kindled my interest in mathematics :D  I damn needed to learn how these worked, so found an emulator program, found a book and started slidin' right and left. As someone who was exposed to slide rules after being exposed to graphing calculators I might say that the slide rule is by far the most intuitive and most inspiring math tool of them all. Just for this reason alone it is worth learning how to use one.

--- End quote ---

You certainly can see the relationships in the calculations you are doing. With a calculator when you see an answer to 10 digits, it looks impressive and must be right with such accuracy. Except, you might have a result that is wrong to 10 digits!

steve_w:
HP 15C till my wife washed it.  Dont ask

SeanB:
I use a somewhat battered Ti58, which works well enough ( but needs the keyboard stripped and cleaned) and have the odd HP and Casio around. TI is on permanently, running off a 3.6V supply as the batteries died and I did not get a charger when buying it at an auction.

dfnr2:
HP15C - one at my desk, and one at the bench.  Great form factor, and very resilient.  Also useful: Python (with iPython / SciPy), Google, Wolfram Alpha

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