HP Forum Archive 18

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One step forward Message #1 Posted by Thomas Radtke on 19 Dec 2007, 9:32 a.m. Yes yes I know, this is not a gallery but I couldn't resist to put it somewhere. No bugs, very clear design: Reason behind this thread is, I just got my original 35. Not mint, but w/ an intact sticker and a working on/off switch. Share my excitement, please :-).

Re: One step forward Message #2 Posted by Dave Johnson on 19 Dec 2007, 10:12 a.m., in response to message #1 by Thomas Radtke I hope you incorporated all the original HP-35 bugs....

Re: One step forward Message #3 Posted by Thomas Radtke on 19 Dec 2007, 10:32 a.m., in response to message #2 by Dave Johnson Sorry, no old bugs. Just new one.

Re: One step forward Message #4 Posted by Ren on 19 Dec 2007, 1:03 p.m., in response to message #2 by Dave Johnson Sooo.... The on/off switch is under the elastic strap? B^)

Re: One step forward Message #5 Posted by Thomas Radtke on 19 Dec 2007, 1:50 p.m., in response to message #4 by Ren Erm...as well as the red dot, yep ;-)

Re: One step forward Message #6 Posted by Walter B on 19 Dec 2007, 10:31 a.m., in response to message #1 by Thomas Radtke Hallo Thomas, this is a very clean design. However, it looks like painted around 1400: there is some idea of a central perspective, but the painter is not fully proficient in it yet ;-)

Re: One step forward Message #7 Posted by Thomas Radtke on 19 Dec 2007, 10:34 a.m., in response to message #6 by Walter B Indeed. And he never will, I fear ;-). Oh, at least not in the morning when he's too tired to do something less nonsensical.

Re: One step forward Message #8 Posted by Paul Brogger on 19 Dec 2007, 10:57 a.m., in response to message #1 by Thomas Radtke Put a two-line LED display on that pup, and you'll have something worthy of "The Sharper Image". (I'm imagining a retro-themed gift item, with a full-page ad in all the airlines' seat-back magazines.)

Re: One step forward Message #9 Posted by Chan Tran on 19 Dec 2007, 11:01 a.m., in response to message #8 by Paul Brogger I would prefer it to be in the original 35 case. 4 line LCD and no bug.

Re: One step forward Message #10 Posted by Thomas Radtke on 19 Dec 2007, 11:08 a.m., in response to message #9 by Chan Tran It's difficult to develop a sound design in this case. If it's too light, it feels like a toy. Add some weight and it takes braces to keep your shirt in place when carrying in your shirt pocket (I guess you all tried a classic in your shirt pockets). Allow it to be slightly thinner than a classic and we have a deal.

Re: One step forward Message #11 Posted by Thomas Radtke on 19 Dec 2007, 11:02 a.m., in response to message #8 by Paul Brogger I tried, but very much to my surprise the button cells ran empty in minutes! I still have to inverstigate this strange phenomenon.

Re: One step forward Message #12 Posted by Gerry Schultz on 19 Dec 2007, 3:30 p.m., in response to message #11 by Thomas Radtke Sorry, I'm confused. Is this an artist's rendering of a 35II or is this a real calculator? Judging by the posts, it appears to be a prototype, but it looks like a painting. What's the background behind this post? Thanks, Gerry

Re: One step forward Message #13 Posted by Ron G. on 19 Dec 2007, 4:07 p.m., in response to message #12 by Gerry Schultz Fantuseee.

Re: One step forward Message #14 Posted by Gerry Schultz on 19 Dec 2007, 5:06 p.m., in response to message #13 by Ron G. Okayyy. That's a little scary. My wife already thinks I've gone off my rocker playing with my 41Cs and peripherals, 48GX, 49g, 49g+ and 50g. If I showed her this post, I might never be let out of the house. I do like the picture though. Good job. Gerry

Re: One step forward Message #15 Posted by Palmer O. Hanson, Jr. on 19 Dec 2007, 10:12 p.m., in response to message #12 by Gerry Schultz Quote: What's the background behind this post? It's an exercise in nostalgia. Note the xy key and the arithmetic function keys to the left of the numeric keyboard.

Re: One step forward Message #16 Posted by Thomas Radtke on 20 Dec 2007, 6:18 a.m., in response to message #12 by Gerry Schultz Quote: What's the background behind this post? Someone (sorry, don't remember who it was) made the point, that the 35 had any capability he ever expected from a calculator. I remembered that when I got my 35 and asked myself how a modern 35 would look like. Sure, such a machine wouldn't sell really but as someone here mentioned, it could be a great giveaway. My conclusion: It looks silly ;^). But - a nice red OLED, this keyboard and a straight and _small_ case would make up for a perfect aniversary model. Im still puzzled about how to design the switch. Maybe it shouldn't have any? Activate on keypress, deactivate after some idle time? That would be another "first" in HP calculators. Hm, HP...would you please...

Re: One step forward Message #17 Posted by Gerson W. Barbosa on 20 Dec 2007, 7:45 a.m., in response to message #1 by Thomas Radtke Hello, Thomas! Quote: Reason behind this thread is, I just got my original 35. Welcome to the club! Quote: Share my excitement, please :-). We do! Early last month, as an exercise I had do make a 20-minute presentation on a random subject. The title of my presentation was HP-35 - A Technological Innovation. I ended up talking about 25 minutes! At the end, as a surprise, I handed the real thing to the audience (teacher and 15 colleagues). Some were even able to do simple calculations, as I had talked about RPN too :-) Beautiful, isn't it? :-) Now, try this simple puzzle: switch your HP-35 on and make it display 35. without pressing any ivory key.. The least number of keypresses the better (even better if you do it with less than 14 keypresses :-). Regards, Gerson.

Re: One step forward Message #18 Posted by PeterP on 20 Dec 2007, 11:27 a.m., in response to message #17 by Gerson W. Barbosa This is a beautiful picture! I don't have a 35, but I'm curious if the following 12 inelegant steps would work: e^x enter enter + enter enter + + enter * x<>y - cheers Peter

Re: One step forward Message #19 Posted by Gerson W. Barbosa on 20 Dec 2007, 3:02 p.m., in response to message #18 by PeterP Hi, Peter! Your 12 elegant steps do work nicely. My 14-keypress solution pales next to yours but I'll list it anyway :-) e^x ENTER^ arc tan x<>y ENTER^ + ENTER^ ENTER^ + ENTER^ + + - Cheers, Gerson. Edited: 20 Dec 2007, 3:16 p.m.

Re: One step forward Message #20 Posted by Thomas Radtke on 20 Dec 2007, 6:05 p.m., in response to message #19 by Gerson W. Barbosa I had exactly the same idea to calculate 45 first, then saw Peter solved it straight forward. Thanks for the nice exercise, Gerson :-).

Re: One step forward Message #21 Posted by Brad Barton on 21 Dec 2007, 7:37 p.m., in response to message #20 by Thomas Radtke My 11 step one is similar the other.. cos x Enter Enter Enter + x^2 + + x^2 x<>y - Of course this is on a 35s, so may work differently on an actual 35. On a 35s I guess I could write a program to display 35, but that would be cheating. ;) Edited: 21 Dec 2007, 7:41 p.m.

Re: One step forward Message #22 Posted by Walter B on 22 Dec 2007, 2:54 a.m., in response to message #21 by Brad Barton Sorry, no x^2 on a 35 :-/

Re: One step forward Message #23 Posted by Stefan Vorkoetter on 21 Dec 2007, 11:20 p.m., in response to message #18 by PeterP Here's another 12 step solution: cos ENTER ENTER + ENTER ENTER 1/x arc sin + + + Stefan

Re: One step forward Message #24 Posted by Gerson W. Barbosa on 22 Dec 2007, 9:03 a.m., in response to message #23 by Stefan Vorkoetter Your solution works on the 33s (I gave away my HP-35s). On the original 35 it returns 36.00000001. cos ENTER ENTER + ENTER 1/x arc sin + + + + This slight change in your solution makes it work on the 35 (but not on the 33s), despite the decimal part. Too bad the 35 lacks 10^x :-) e^x ENTER^ arc tan x<>y 10^x - If you don't have a 35 to play with, I would suggest Eric Smith's Nonpareil. Regards, Gerson. P.S.: A 13-keypress solution using blue keys only: EEX ENTER^ ENTER^ + ENTER^ ENTER^ + ENTER^ * ENTER^ + + + Edited: 22 Dec 2007, 10:12 a.m.

Re: One step forward Message #25 Posted by Stefan Vorkoetter on 22 Dec 2007, 11:21 a.m., in response to message #24 by Gerson W. Barbosa Quote: Your solution works on the 33s (I gave away my HP-35s). On the original 35 it returns 36.00000001. cos ENTER ENTER + ENTER 1/x arc sin + + + + Do you mean "35.00000001"? I can't imagine how it would produce 36.00000001 This slight change in your solution makes it work on the 35 (but not on the 33s), despite the decimal part. Here is your solution with the stack annotated. Please tell me how this could possibly work: cos 1 0 0 0 ENTER 1 1 0 0 ENTER 1 1 1 0 + 2 1 0 0 ENTER 2 2 1 0 1/x 0.5 2 1 0 arc sin 30 2 1 0 + 32 1 0 0 + 33 0 0 0 + 33 0 0 0 + 33 0 0 0 It produces 33, not 35. Stefan

Re: One step forward Message #26 Posted by Gerson W. Barbosa on 22 Dec 2007, 11:54 a.m., in response to message #25 by Stefan Vorkoetter Quote: Here is your solution with the stack annotated. Please tell me how this could possibly work: cos 1 0 0 0 ENTER 1 1 0 0 ENTER 1 1 1 0 + 2 1 0 0 ENTER 2 2 1 0 1/x 0.5 2 1 0 arc sin 30 2 1 0 + 32 1 0 0 + 33 0 0 0 + 33 0 0 0 + 33 0 0 0 It produces 33, not 35. In fact on my 33s is does procuce 33. On the original 35: cos 1 0 0 0 ENTER 1 1 0 0 ENTER 1 1 1 0 + 2 1 0 0 ENTER 2 2 1 0 1/x 0.5 2 1 0 arc sin 30 2 1 1 => On the back plate it reads "* FOLLOWING ANY TRIG FUNC- TION z IS DUPLICATED INTO REGISTER T." + 32 1 1 1 + 33 1 1 1 + 34 1 1 1 + 35 1 1 1 Gerson.

Re: One step forward Message #27 Posted by John B. Smitherman on 25 Dec 2007, 1:52 p.m., in response to message #24 by Gerson W. Barbosa Hi Gerson. I'm curious to know why you gave away your 35s. Regards, John

Re: One step forward Message #28 Posted by Gerson W. Barbosa on 25 Dec 2007, 2:09 p.m., in response to message #27 by John B. Smitherman Hi John, I could live with the bugs but I just didn't like the exponent being hidden most of times, especially when in STD display mode. I have to remember to send the manual to the happy owner :-) Cheers, Gerson.

Re: One step forward Message #29 Posted by Thomas Radtke on 20 Dec 2007, 6:10 p.m., in response to message #17 by Gerson W. Barbosa Now I have to show mine I guess :-) It's a german model.

Re: One step forward Message #30 Posted by Gerson W. Barbosa on 20 Dec 2007, 7:46 p.m., in response to message #29 by Thomas Radtke Looks really nice! I have the complete set also, but the latch in the travel case is broken. Have fun! :-) Cheers, Gerson.

Re: One step forward Message #31 Posted by Richard Ottosen on 22 Dec 2007, 2:18 p.m., in response to message #17 by Gerson W. Barbosa Greetings, Gerson: Fun challenge. Here is my 11 step solution: EEX Enter Enter + + Enter + Enter X EEX - Only the blue keys are used and no clearing of the calculator is needed. -- Richard

Re: One step forward Message #32 Posted by Gerson W. Barbosa on 22 Dec 2007, 2:55 p.m., in response to message #31 by Richard Ottosen Cool! Quote: Only the blue keys are used and no clearing of the calculator is needed. This is really a greater challenge than just not allowing the white keys. It's great to see the old 35 is still fun after all those years! Cheers, Gerson

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