General > General Technical Chat
Do you still use stand-alone ("pocket") calculators?
chickenHeadKnob:
--- Quote from: IanJ on January 20, 2020, 12:12:22 pm ---
--- Quote from: blacksheeplogic on January 15, 2020, 05:07:13 am ---My wife has found and 'put away' a lot of my calculators and no doubt she will eventually find these as well.....
(Attachment Link)
--- End quote ---
Oooh, you have an EL-5155.......I have 2off EL-545 which use daily at work and in the workshop at home.
Not sure the difference but physically identical just about.
Ian.
--- End quote ---
When Blacksheeplogic presented his collection my first thought was: " erm, that lad has issues", then I noticed the basic scientific sharp and thought " no he will be alright". I have a EL-540D in my desk drawer, purchased 1985. Last calculator of the hand I will ever buy. I extract and use maybe once every three months. 10 digits non-programmable should be sufficient for anyone.
smithnerd:
--- Quote from: Mortymore on January 19, 2020, 12:03:23 am ---
Integral of ln(x^2)dx, from -5 to 99 (EDIT: as can be seen in the photo, on Casio FX-991ES display)
Casio FX-991ES -------- 3m15s -------------- 717.9281095
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My FX-991ES does it in 2m56s - I must have an overachiever (or different ROM). My older FX-991W (c2000) does it in 1m28s, but rounds the result up to 718.
Cnoob:
I use a HP prime, 2 reasons, it has a nice clear display and it displays your equation so you can check if you made a mistake.
I do use windows 10 calculator mostly for conversions.
george.b:
--- Quote from: Mortymore on January 19, 2020, 12:03:23 am ---Integral of ln(x^2)dx, from -5 to 99 (EDIT: as can be seen in the photo, on Casio FX-991ES display)
Casio FX-991ES -------- 3m15s -------------- 717.9281095
HP 39G II ---------------- 7s ------------------- 717.928109451
HP 49G+ ----------------- 25m 38s ----------- 717.928325369
HP 40GS ----------------- 20m48s ------------ 717.928325369
HP 49G ------------------ 54m54s ------------- 717.928325369
HP 48G -------------- was not able to solve
Microsoft Mathematics on a i5 ---- 0s ------ 717.9281094509898
--- End quote ---
My HP 48G+ finished it, took a long time (sorry, didn't measure it), but it arrived to a result of 717.928325369.
Messtechniker:
Still going strong - except for batteries of course - is
my Texas Instruments SR-56. 8)
Use it now occasionally to work out decibels :-+
My father bought it when it was new in the USA.
Was quite a sensation at the time in Germany.
Used it to do physics homework in no time,
because math tasks had been set up with the
intention of using a slide rule. Nowadays: :scared:
This was eventually changed. Thankfully after
having completed my studies. :-+
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