This is a project to imagine what HP would have made today had they still been making calculators. It is unusual for a newly designed RPN calculator to be released, although there have been several re-releases of older HP models, such as the HP-15ce, HP-16c, and a series of calculators made by Swissmicros - DM-15L, DM-42, DM-32, but all based on designs dating back 30-50 years.

The R47 has been many years in the making and is a small open source project which has collaborated with the Swiss manufacturer of calculators, SwissMicros. It has a superset of functions over older HP models and many more too, including complex solve, default 34 digit decimal precision, 1000 digit integers, graphing, extensive complex support, etc and is substantially customisable.

I have no affiliation with the project, but excited that there is a new RPN machine commercially available.

[0] https://youtu.be/5A-pmjawJg8?si=11Ehf5SnzkZF79-e

Already Out of Stock. I want one :-(

I really want one, but 250 credits is quite a bit too much. Even at 100 credits I'd be questioning my sanity, to be honest.

I still have my HP 48G and love it. I don't use it much and take the batteries out so they don't corrode in the case.

Every time I use for more than a couple of calculations I think how much I prefer a RPN calculator.

Ooh, I'm going to have to download the emulator tonight and try this out. The swiss micro and 47calc sites both say "display with 4 stack levels", but I can't figure out if that is also the size of the logical stack.

The shift key on my HP28C died last year. I never used the advanced features (eg the entire left-hand keypad), but loved its effectively infinite stack, and haven't been able to go back to an HP42 or the like since.

I'm now using Plus42 on my phone with the big stack option, but would love to have a physical calculator again.

There was a time when I would have salivated over this. But now I can run iPython on my phone, and have numpy, sympi, scipy, astropy and countless other packages. Physical keyboards are great for calculators - much better than virtual keyboards on phones. But the keyboard advantage seems to me most valuable for quick calculations, not elaborate things like this calculator offers. If I'm going to do matrix calculations, I want to be able to put the data into a file with a real, and familiar, editor. I want to be able to grab tables of data from the web. If I make a plot, I want to be able to save it to a PNG file. I want a high resolution color display. A phone running iPython/Python seems much better to me, especially since almost everyone who would want to do what this calculator does already has a smartphone. Also, I can ssh into my phone and interact with it using my desktop computer's keyboard and monitor, eliminating the phone keyboard limitations when a full sized computer is nearby.

I still miss my 15C.

Cool. I used an HP48SX in college, and when it finally died about 20 years later, bought 2 HP48Gs so I'd have a Lifetime Supply. (1 is on my desk, 1 is still in the box.) But I confess that hardly ever use my real HP48G anymore, because I have the Droid48 Android app, and the 99% perfect calculator that's always at hand is better than the 100% perfect calculator that's on a shelf way over there, most of the time.

So I doubt I'll buy this one, even though I'm happy someone made it.

Honest question but who would need this these days? Would this calculator still be useful for professors/mathematicians/etc or is this more for HP calculator enthusiasts?