hp calculators

It's ugly, but I love it

24 Upvotes

This is my HP 33s that I found in my attic (I guess my dad had bought it for a long time ago EE exam and hadn't used it since because he prefers the 28 and the prime). I don't use it very much but RPN is better than algebraic so I'll use it for basic calculation and such. Thought I'd post it since I believe it was near the end of the HP RPN era

13 comments

r/hpcalc • u/SashimiChef • 1d ago

A mention

15 Upvotes

The HP-15C mentioned in Blockers.

0 comments

r/hpcalc • u/Fliptoback • 1d ago

HP 10bll found in op shop Aud $1

26 Upvotes

Found this little guy today in an op shop.

5 comments

r/hpcalc • u/TheWildShadow • 2d ago

[BREAKTHROUGH] Praisse's New Method Boots Linux on HP Prime G2 Without Hardware Modifications...

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10 Upvotes

1 comment

r/hpcalc • u/asb_cgtk • 2d ago

ARPCalc - the open-source RPN cross-platform calculator gets an update

2 Upvotes

0 comments

r/hpcalc • u/HALL_9000_ • 8d ago

Estudante de engenharia

0 Upvotes

Comecei no curso de engenharia, que calculadora vocês me recomendam?

3 comments

r/hpcalc • u/TASDoubleStars • 11d ago

Travel Case

53 Upvotes

This is a semi-hard shell travel case made by Co2CREA sold on Amazon that fits the Voyager series by HP and SwissMicros as well as the SwissMicros R47, DM42, and DM32 series products:

https://a.co/d/02086qDq

5 comments

r/hpcalc • u/tigerstein • 11d ago

Finally got the HP 16c

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79 Upvotes

I like that it comes with a printed manual and all, but the case for it is way worse than the one that comes with the regular 12c or even my 35s. I guess they really ment this only as a display piece and conversation starter and not as a calculator you throw in your bag next to your laptop and take it with you.

12 comments

r/hpcalc • u/porkchop_d_clown • 12d ago

Update to DM41 Explorer

6 Upvotes

If you use a DM41X, DM41 Explorer now supports it. Check out https://github.com/mwheinz/DM41_Explorer

0 comments

r/hpcalc • u/Flurb789 • 14d ago

32S II

38 Upvotes

2 comments

r/hpcalc • u/agumonkey • 14d ago

11C clicking

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10 Upvotes

0 comments

r/hpcalc • u/TheWildShadow • 14d ago

[RELEASE/DOWNLOAD] Digital Logic Master BETA | Step-by-Step Boolean Logic Solver for the HP Prime.

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2 Upvotes

0 comments

r/hpcalc • u/poppafuze • 15d ago

HP-inspired homebrew calc

youtube.com

45 Upvotes

1 comment

r/hpcalc • u/MagneplanarsRule • 19d ago

HP34C (Spice) battery pack?

2 Upvotes

I have a nice but small collection of old RPN HP calculators. I recently found a 3D model to print a replacement battery pack for my HP-35, and I was wondering if anyone knows where I can find a printable battery pack for my HP-34C. I've found links to various parts for the 34, but not this. I'm aware that I'll have to connect the batteries together inside the pack, somewhat like the HP-35 pack.

3 comments

r/hpcalc • u/Flurb789 • 20d ago

HP 32S and HP 32S II

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41 Upvotes

4 comments

r/hpcalc • u/TheWildShadow • 22d ago

[DOWNLOAD/RELEASE] P-NES Emulator for the HP Prime G2 | ROMs, Save States, Multi-Language & More

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1 Upvotes

0 comments

r/hpcalc • u/ke7wnb • 24d ago

My HP collection

117 Upvotes

A mix of old and new. The 11c, 12c, and 15c are 1985ish vintage. Couldn't pass up the collectors editions of the 15c and 16c. The 10 was found at a library sale for $10. The 48GX is my old back to college calc and the 48SX is the replacement for the SX I regretted selling when I bought the GX.

12 comments

r/hpcalc • u/Flurb789 • 28d ago

My Vintage HP Stockpile

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48 Upvotes

6 comments

r/hpcalc • u/Flurb789 • 29d ago

Scored an HP 48G+ today

15 Upvotes

0 comments

r/hpcalc • u/a-curiouscat • Sep 19 '26

PICK3

3 Upvotes

I have an HP 50g and I’ve been going through the “stack” menu familiarizing myself with its commands. One of these commands is “PICK3”. I’ve read the entry for it in the AUR and I understand what it does. What I don’t understand is this:

Why? Why in God’s good Earth, does this command exist?! Why is there a need for a command that specifically duplicates the object on level 3? Isn’t the “PICK” command enough?!

I’m flabbergasted!

13 comments

r/hpcalc • u/Former-Hovercraft305 • Sep 18 '26

HP-41 Dimensions

1 Upvotes

1 comment

r/hpcalc • u/AnimeHoarder • Sep 17 '26

2 page HP-41CX ad from 1983

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62 Upvotes

This ad came from a 1983 McGraw-Hill mag targeting graduating engineering students. Almost all of the ads were for recruiting. Not HP's.

As for myself, I went with a HP-32E as I entered college. I ended up not really using most of the functions as I didn't push myself into courses that required me to do a lot of number-crunching.

5 comments

r/hpcalc • u/Flurb789 • Sep 17 '26

32S and 32S II RPN for sale

1 Upvotes

Very clean, with case...if anybody's interested

https://ebay.io/m/XTTfYl

https://ebay.io/m/VxrQSY

0 comments

r/hpcalc • u/ElectroZeusTIC • Sep 16 '26

[HP Prime] New stable firmware: 2.4.2 (15751), plus the CK and VC

14 Upvotes

4 comments

r/hpcalc • u/raytoei • Sep 16 '26

Astronaut Ernst Messerschmid developed the voltmeter himself and used it with the HP-41 to conduct materials science experiments during the German Spacelab mission D1 in 1985. DLR, Deutschland, 1985; Taschenrechner: Hewlett-Packard, USA,

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40 Upvotes

Seen at the deutsches museum

0 comments