One step forward



#2

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 :-).


#3

I hope you incorporated all the original HP-35 bugs....


#4

Sorry, no old bugs. Just new one.

#5

Sooo....

The on/off switch is under the elastic strap?

B^)


#6

Erm...as well as the red dot, yep ;-)

#7

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 ;-)


#8

Indeed. And he never will, I fear ;-).

Oh, at least not in the morning when he's too tired to do something less nonsensical.

#9

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.)


#10

I would prefer it to be in the original 35 case. 4 line LCD and no bug.


#11

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.

#12

I tried, but very much to my surprise the button cells ran empty in minutes! I still have to inverstigate this strange phenomenon.


#13

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


#14

Fantuseee.


#15

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

#16

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.

#17

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...

#18

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.


#19

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


#20

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.


#21

I had exactly the same idea to calculate 45 first, then saw Peter solved it straight forward. Thanks for the nice exercise, Gerson :-).


#22

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.


#23

Sorry, no x^2 on a 35 :-/

#24

Here's another 12 step solution:

cos
ENTER
ENTER
+
ENTER
ENTER
1/x
arc
sin
+
+
+

Stefan


#25

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.


#26

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


#27

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.

#28

Hi Gerson. I'm curious to know why you gave away your 35s.

Regards,

John


#29

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.

#30

Now I have to show mine I guess :-)

It's a german model.


#31

Looks really nice! I have the complete set also, but the latch in the travel case is broken.

Have fun! :-)

Cheers,

Gerson.

#32

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



#33

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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