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I am sorry, but with Firefox, the video is upside down.

I barely scratch the surface of what a 35S will do, and I am far from a whiz on RPN, but I discovered an advantage to them. Folks in the office who mooch your calculator "for just a few minutes" will borrow your HP... once.

bomm dia, está calculadora está a venda? quanto custa?

Bom dia esta calculadora está a venda? quanto custa?

You have done some great videos on the HP 35s Calculator, and they helped me a lot to use that machine properly. However there is one thing, that still gives me trouble, and that are "Flags". So could you please explain in a video, what Flags are, what they are good for and how to use them properly? Thank you very much indeed!

This calculator have a world of functions inside. Masterpiece of engineering.

Amazing!

Got mine some days ago. Having used RPN for years and the Free42 app on my phone for a long time, I knew the functionality of the DM42, which use the Free42 software. I like very much the connectivity of the DM42, meaning I can backup and copy between it and the PC. Using real buttons instead of the touch screen of the phone has me make fewer entering errors. And speaking of buttons: Yes, the buttons are a bit stiffer than the original HP buttons, but they also have a very positive click when engaged. If anything, I tend to prefer the feel of the DM42 buttons to the original HP (some may consider this being heresy). Mind you, that is for the improved keyboard of later years. The first versions had a mediocre keybord feel. Some have criticised that the LCD is not backlit, but this would have meant more battery drain. One of the nice things about the DM42 is that its battery lasts a long time (a year or so (?), depending on use). The insane accuracy is great in theory, but is largely wasted on me. I almost always need magnitudes more than numbers exact to the n'th decimal. The accuracy of a slide rule (three significant numbers) is enough for most of the things I calculate. Of course, the D42 is nerdy galore, since there are free phone apps that can do the same - and Excel can do even more (however, Excel is not for the quick calculation on the fly). But then I also use an old log-log slide rule from time to time (actually it's just as fast or faster for some things involving exponential calculations like 1'st order decay, compound interest, discounting etc.). Given the slide rule was THE calculating tool for the design and construction of all kinds of machines, structures, buildings etc. before the advent of the electronic calculator and the PC/Mac, in my book it's one of the greatest inventions ever. But don't get me started ..... To sum up: I'm perfectly satisfied with the DM42 and it is readily recommended by me.

Thanks for the video. It gives me hope for my beloved 20S I've had since the 80's. My 20S was acting irradically, for instance, sometimes adding 2 numbers correctly, but at other times ignoring the + sign in 2+3 and showing just 23 and waiting for the next command. Soon I will get up the gumption to actually do what your video teaches. Thank you. 6 days later. well, I did everything as shown in ths video except I also drilled the 2 stubs near the batteries, as mentioned below by one of the commentors, which made it much easier to take apart. The first time I did everything as shown in the video, and when I got it all re-assembled and put the batteries in I got the same "All CLR" message, but when I tried to do some simple calcs it still had trouble "seeing" all of the key strokes. So I reassemble it again, put new foam stripes in as shown here, put it back together again, and Ka-Bang it looked like everything worked. I was happy! Two day later I thought I do some calcs, and found that now none of the keys responded, only showing 0.0000. So I give up. HP, that design is so Mickey-Mouse, so disappointing. ....contacts via pressure? rivets vs 4 screws ....anyway, it did work for a while.... interesting exercise.

Odd question but can you show us how the calculator differs whenever its connected to a usb c cable? What other uses would it have? Does the screen work differently or does it work faster? Id love to know!

Thank you! My ancient HP15C was showing garbage on the display and this reset fixed it.

Thank you Logan!

Legend.

I recently found my Dad's slide rule and am learning how to use it. I had started to use one in high school in 1972-73. Then the scientific calculator came out and the slide rule disappeared. I've been teaching myself and it is challenging, but fun. You really get a better sense of the numbers. I'm a semi- retired civil/structural engineer, and have always wanted to learn how to use one. Your videos are helpful.

Hola buenas tardes. Por favor puedes explicar como funcionan las condiciones x>y x<y x=0 Muy amable hasta pronto

How long do you have to wait in order to press the same button again without changing the input on the screen? For example when I need to input π^e I need to press the same button twice so once I enter a π how long do I wait to input an e without changing the π that's already on the screen?

Great review.... i am curious to know, since the DM42 has a clock would programs written for the HP-41 that used the clock also work on the DM42?

Can you do an auto repeat on this? Such as hitting equals twice to to use the same number, instead of say, .5555 minus .09183 equals equals?

does it have list processing capability (like the hp48)?

Do you know if the DM32 or DM42 have right triangle calculators, like to find angles or sides of triangles? For pipefitting it would be very useful.

Nice video! I'm about to try this on a HP-22S. Maybe I'll record it if all goes well.

I am a pipefitter and I rely my HP 32sii everyday for work. We cannot have cell phones in many work areas especially chemical plants. My HP does fractions so well and I love RPN. My first one broke and I'm on my second, but they are getting more expensive and hard to get. I am relieved there is still an option out there as an alternative to my HP!

This is great, I'm going to show this to my geometry students. Thank you!

I was on the fence about picking one of these up, but I think you've convinced me. The build quality looks incredible.

There is an alternate method for finding Common Logarithms without the use of the L scale. This can be done on a slide rule by using the LL scales which are known as the Log-Log scales. For example, to find the common logarithm of the number 4, first move the right end index of the C scale over 10 on the LL3 scale. Next move the cursor hairline over the number 4 on the LL3 scale. Then read above it on the C scale that the common logarithm of 4 is 0.602. The reason why this works is because common logarithms have the base of 10. The number of interest is 4 in this example. The exponent turns out to be 0.602 read on the C scale. In other words, 10 raised to the exponential power of 0.602 equals the number 4. A logarithm is actually an exponent.

0:24 F..k NIce. On a HP33s only the backspace is working. Why are my errors always in the beginning?

It took a few tries, but finally worked on my hp 11c. Amazing it works after about 40 years. Thanks. I also have the RLM app on my iPhone.

Ok, I finally manned up and did it. My thoughts: Be extremely patient, do it under good light and preferably before you hit your sixties, some of those connections were hard to see. Overall, it was for me a 2-hour job. The PDF referenced in the notes is a lifesaver for disassembly, note that the relevant instructions begin on page 7. I did have to remove the keyboard overlay in order to pop up the lower rivets, those 8 rivets were probably the hardest task of all. I appreciate your video and the PDF link, my 32S is working properly again. 👍👍

every time i convert my fraction to a decimal it gives me a lower number, i dont know why

It's really a shame that companies have forgone the use of screws in the assembly process. Not realizing or caring that at some point in the future someone may want to disassemble for a basic cleaning or repair.

Yes swap x,y key like directional comma key on sharps.

20 yrs your now a hobby to amuse an share thanks,

Great survey calculator used 1990s by me in Feild in Canada. Prmg are long, but true. ..

Thank you Logan

According to my calculator, 3 and 11/12 is the exact correct value, so that annunciator is wrong. Or more probable, floating point rounding caused it to compute a result slightly too high.

Bringing a gun and a sword to cut. Love the "just in case" approach. Thanks for the video!

Thanks for putting this together. Just as there probably aren't many folks who can use a sundial, one day there will be equally few who can use the 'slipstick' as we did in fact jokingly refer to them. Anyway, I have over the years took my old K & E out of the case from time to time but the rust on the grey matter has settled in and about all I can fluently use it for anymore is multiplication, division and roots. I'm gonna drop in here from time to time and see if I can limber up the brain a bit.

The first calculator I ever owned was a 1970s Omron scientific, an 86SR with a blue-green vacuum fluorescent display and big round buttons. It was a fairly basic machine by today's standards, but it had trig functions, log and exponential and scientific notation. My father had gotten one for himself and then he got me one. I didn't know what most of the advanced functions did yet, but it primed me to learn about those things. I think it was where I learned scientific notation. I used that until sometime in the mid-1980s when it broke--then I used Sharp calculators for a while, then switched to HP's powerful RPL machines in college, a 28S and then a 48SX. The 48 got stolen after a few years; I think I still have the 28S somewhere. But phone apps (including HP emulators!) have mostly taken the place of physical calculators for me.

Thank you for your great video. I am an old engineer and used slide rules for year. My first HP´s were HP 35 , 45 and 41. They were all more than 1000 US dollarseach in those years here, very expensive for us, Argentines, but they still work...Cheers from Patagonia.

Why none of these videos explain how to enter equation mode and how to enter the equation itself ?

Trying to find a USB A to USB Micro-B that inserts far enough. Planning on putting some of the "other" calculators on it (C47 for starters). What USB cable are you using?

Love your videos Logan. I'd love to see you buy the overlay and load the classic 47 firmware onto the DM42 google for "The C47 calculator project" to find it. You could do a practically endless series of videos on it as there are so many features. There is virtually no nice documentation a jumble of PDFs only the WP43S manual is in friendly format and there are so many features and functions that need explaining. You could add real value here I think.

I loved my HP calculators, all of them, and I enjoy your reviews. But for 300+ bucks now, well, I like them, but I don't love them... :) I enjoy your videos, and the little trip down memory lane.

On the L scale for Common Logarithms, its midpoint is at 0.5. This location corresponds to the midpoint on the D scale which is at 3.16, because log(3.16) = 0.5.

Did you ever worked as an 2nd Level Professional 😉? Sounds like, very straight forward walk through 👍

Engineers review, very nice. Thanks a lot👍

Let do some biorhythms

Thx for share bro. Unique

Is this possible on the -11C?

I used a sliderule and pencil and paper for most of my needs until I had an opportunity to use a HP-41 sometime in the 80s. Once introduced to RPN I was hooked. I still have and use my HP-41CV and HP-41CX calculators. For financial calculations, I use my HP-12 and HP-15. Your video and others have me interested in the DM-41 and DM-42 models now. Although I'm retired now, I guess I'll always be an engineer at heart.