C47 Calculator Review

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This is a review of C47, a community-developed RPN calculator that runs on the SwissMicros DM42 hardware platform.
The website for the C47 project is located at 47calc.com
Sections of this video:
0:00 - Intro
1:34 - Project History
3:14 - User Interface
5:16 - Basic Usage
6:26 - Data Types
12:57 - Equations, Statistics and Modelling
17:10 - Programming
18:03 - Customisation and Load/Save State
19:48 - Summary
For more calculator videos checkout my channel at / calculatorculture

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Опубликовано:

13 июл 2024

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Комментарии : 33

@N.A._McBee 28 дней назад

Great job, a nice overview of what one can expect from the C47! I share your enthusiasm regarding the further development and the help of the developer team. It's indeed no problem to make a six-hour video about the C47, or even several of them. Given the time frame you used, this was a wonderful introduction and hopefully it attracts some more users to the C47. Thanks again and keep up this good work!

@johan0234523 27 дней назад

I really like the idea of the C47, and I had it on my DM42 for a while. The main reasons why I went back to the plain DM42; the C47 small fonts (also for the equation writer) are hard to read for me, and there is no C47 app for the iPhone. With Free42 on my phone and my laptop, and keeping state files in sync with the DM42, I basically have the same calculator everywhere.

@MrWaalkman 28 дней назад

Time for me to flash C47 on my DM42. Thanks for the detailed review. :)

@richardthunderbay8364 27 дней назад

Really impressive calculator software. I wish I had had it as a grad student.

@markthomas7104 28 дней назад

Great introduction to the C47 and its system of operation

@christophe3d 27 дней назад

Great job as usual. The DM42 screen is difficult to light, but you did a great job! Thank you for the shoot out to DB48X, can't wait to see your video on that topic.

@michaelfelzien6765 28 дней назад

wonderful review, very much enjoyed.

@commtechengineer612 24 дня назад

Dang.... now I need to give this a try. Thanks for the video!

@LeicaCat 27 дней назад

Might want to turn off auto white balance on your video camera.

@CalculatorCulture 27 дней назад

Thanks for the tip

@rideon41 12 дней назад

Thanks for the video, great as always! Excited for the C47 as it is developed further. It has great potential, but I have to say, right now the general display update speed needs to be worked on. This is running on DM42, it should be much faster, and it detracts from the experience. Definitely looking forward to your video on DB48X!

@geoffquickfall 27 дней назад

Absolutely wonderful calculator as is the WP34s. Did you upgrade the WP34s with the quartz timer/clock and the infrared printer option. Nice that the 47 has both those supported. Thanks for you reviews. Geoff

@CalculatorCulture 16 дней назад

Yes I actually bought a pre-converted WP34S which does have the timer/clock.

@RensePosthumus 28 дней назад

As soon as the C47 reached a mature state, I bought a second DM42 and flashed it the C47 software. Nowadays the DM42 gets less and less usage

@thomasgoossens857 28 дней назад

I did the exact same thing, and I do find myself picking up the C47 more and more.

@johan0234523 28 дней назад

I love the idea of the C47, but the small font doesn’t work with my eyesight. Not a problem with Free42 / DM42.

@bamobamo-ck6os 28 дней назад

@@johan0234523Any particular items on the screen or faceplate which are too small?

@johan0234523 27 дней назад

@@bamobamo-ck6os the equations, the special characters font, and the annunciatiors basically. The three lines menu is also a bit busy for my eyes. I can use the DM42 without my reading glasses. Not so with the C47.

@emefff 24 дня назад

I think it's great, but there are some things to be done. The solver seems REALLY slow, the DM42 platform should allow for nearly instantaneous numerical solving of this equation (plotting also seems very slow). Even 41c is quicker, which should be 75 times slower on paper. I'm a bit worried about the yellow key, it will see much more action than all the others (but there's no way out). A port of wp34s to DM42 also exists, which I highly recommend. And as always: great video!

@CalculatorCulture 24 дня назад

Thanks for the insightful comments. Yeah i get the impression is the solver is relatively new and hasn't been optimised yet. I didn't know about the port of WP34S to DM42 - I will check it out.

@emefff 24 дня назад

@@CalculatorCulture I don't think it is about an optimiziation of the solver code (that's only a few lines, maybe 10-20, depending on the method(s) used), perhaps there's something else wrong with it. The shown iterations are very slow, maybe it has to do with the graphics around it (waiting for graphical stuff to complete, IDK). C-47 runs, more or less, at the hardware level. My conservative estimate is, that the solver could be 100-1000times quicker. A solver written in user-code on HP41 is quicker (it even shows intermediate values of the solution), that should tell us something.

@iAPX432 9 дней назад

Swiss Micros should be proposing an hardware upgraded version of it's base: rechargeable battery (through USB-C), better screen (larger, color, etc.), more internal storage, ... And then add "personalities" through keyboard bezels and firmware, to be able to go from a 41CX to a 67 or anything else under the sun with the same format. Maybe be able to have different personalities loaded, and be able to switch, each one with its own dataset.

@gmaxwell 3 дня назад

The particular (memory lcd) screen is a big part of why the dm42 is a great device.

@RobertoCarlos-tn1iq 11 дней назад

can you check what answer you get for the cube root of -8?

@richardnineteenfortyone7542 24 дня назад

Dumb questions: Can it beep? Can it do STO -> XOR 19F and RCL AND 2E2 ? Can it take a 500 Gig SD card and use it for backup with standard PC compatible formatting? Does the display fade when it is left in you car in the hot Nevada sun? What is the power source? Does the charging use a standard USB connector, or a proprietory one that is generally unavailable? Does it have blue tooth for link and file transfer to PC and other C-47's? Is it free from HP Prime's student mode and other gimmicks not needed or wanted by technical professionals? Do the keys get smashed like HP-35s, WP-34, and HP Prime, or are they robust like early HP machines with good tactile feel and durability? Is there an emulator that runs on PC and iPhone? Does it have files and folders? I remember when HP was a good place to work and catered to the needs of advanced technical professionals for powerful durable in-hand computing. (I worked next door to them and would occasionally encounter Claude Shannon on my after-work bike ride to the Stanford book store.) That was a long long time ago. Their MBA types replaced engineers in management , drove away their best people, and abandoned their most loyal customers. It's time to move on...

@CalculatorCulture 24 дня назад

Yeah this video is really aimed to those who own a DM42 or WP34S and assumes a lot of preexisting knowledge. For hardware related questions you can check out the specs of the DM42 here: www.swissmicros.com/product/dm42 The keyboard and screen on the DM42 are very high quality. Generally if there are big areas of functionality that I didn't mention during the video then C47 doesn't do it, although I did forget some things. For example there is a Windows emulator, and C47 supports sounds and clock functions.

@nezbrun872 25 дней назад

My positive and constructive comments have been deleted twice now on this video, any idea why?

@CalculatorCulture 25 дней назад

I’m not sure - I haven’t seen or deleted them. I don’t delete comments in general. Were there links in them? Sometimes that triggers RU-vid’s anti-spam filters.I doubt this would apply but YT also has other filters on strong language.

@nezbrun872 24 дня назад

@@CalculatorCulture OK thank you. My comments were a thanks for your content, and information on a non-adhesive tabbed keyboard overlay that I use on my DM42/C47 that fits inside the divots around the keyboard. I guess it'll have to remain secret where I got it from! Furthermore, while the C47 has become my go to calculator these days, taking over from the WP-34s, there is one noticeable aspect that still needs work, that of display update speed: the C47 can feel somewhat sluggish at times, with keystrokes queued up. I've seen mention that there is scope for this to be optimised.

@CalculatorCulture 24 дня назад

@@nezbrun872 yeah it's clear there are some optimisation to be done in areas.

@andrewkirk4184 27 дней назад

hard to understand due to audio distortion; this is an ongoing problem

@bamobamo-ck6os 27 дней назад

I used the automatic subtitles. They were actually not so bad.

@CalculatorCulture 26 дней назад

Interesting. It has been a while since I’ve seen comments about audio quality. I think there is a bit of echo from the room, which I’ll try to remove in the next video.