| General > General Technical Chat |
| Do you still use stand-alone ("pocket") calculators? |
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| johnboxall:
--- Quote from: RoGeorge on May 22, 2023, 08:25:52 am --- --- Quote from: johnboxall on May 21, 2023, 12:25:24 pm ---Yes. I spend a few hours a day in an environment where we can't have any radio signals, static, etc. So I take in a HP 35s. --- End quote --- Is HP35s in a metal enclosure, or do you just turn it off during measurements? --- End quote --- It has a plastic enclosure. I usually turn it off after use, more of a reflex/OCD thing than anything. |
| pdenisowski:
All the time :) --- End quote --- |
| David Hess:
--- Quote from: DrGeoff on May 21, 2023, 11:33:25 pm --- --- Quote from: rsjsouza on January 31, 2020, 05:14:21 pm --- --- Quote from: george.b on January 21, 2020, 06:53:41 am --- --- 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. --- End quote --- My HP35S failed to compute due to the discontinuity, but the 48G emulated on my Galaxy S8 (Droid48) finished in about 45s with the same result of 717.928325369. :-+ --- End quote --- Just to add to the numbers. On an old (1980/81) HP15C this took 10m35s and evaluated as 718.0021. --- End quote --- After resetting various CAS parameters, HP50g took just seconds to reach the HP 39G II result of 717.928109451. |
| Ed.Kloonk:
As I mentioned previously in the purchased-today thread, I recently bought a exact pocket calculator like my own one from the mid 80's. It has some nice Hex/Bin/Dec features and I'm quite fond if it. And it's sure seen some battles. The battery in my old one is starting to go and rather than fix that, I just bought another one from some guy in Europe. So this thing arrived and compared to my old one, the 'new' one is in mint condition. I mean really remarkable good condition. It's still in the cardboard box it came and I'm too frightened to contaminate it. |
| kripton2035:
HP prime (G1, a G2 would be faster) Integral of ln(x^2)dx, from -5 to 99 took no time to calculate, 0s and gave 717.928109451 |
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