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Full Version: Scientific Calculator Keyboard Challenge II
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Link to my blog entry: http://edspi31415.blogspot.com/2016/02/s...board.html

Feeling creative? Ever dreamed of the perfect calculator? Here is a chance to design a calculator. It can cover any part of mathematics you want:

* Scientific
* Financial
* Programming/Graphing
* Algebraic and/or RPN (Reverse Polish Notation)

Or if you want to go a specialized route:

* Construction
* Unit Conversion
* Gaming
* Geometry Applications
* Civil Engineering
* Physics
* Astronomy
* Stock Market
* Common Every Day Applications

Rules:
* The keyboard must be used, including the arrow keys. Assume that the calculator will have the necessary screen size. You have 16 blank keys, of course, you can/should consider using shift and alpha keys.
* The keyboard has a double-wide Enter key. RPN and Hewlett Packard fans rejoice!
* The marked keys must remain.
What's the reason for the joystick arragement of the cursor keys? I take it as a marketing element to attract gamers, and think there's nothing expedient to it; just the opposite.

ENTER is in the wrong position, as are the binary operator keys .
1+

And the cursor should be moved one row down, allowing for a row of six softkeys.

d:-/
(02-27-2016 04:54 AM)walter b Wrote: [ -> ]1+

And the cursor should be moved one row down, allowing for a row of six softkeys.

d

Or five softkeys.
(02-27-2016 05:12 AM)Den Belillo (Martinez Ca.) Wrote: [ -> ]Or five softkeys.
I think Walter implied making some rows with smaller keys as found on all(?) non-Voyager HP calculators. Turned out to be very useful imho.
Thanks, Thomas, for your support. I think Dennis was just happy having found something he could pick holes in.

d:-/
(02-27-2016 09:23 AM)walter b Wrote: [ -> ]Thanks, Thomas, for your support. I think Dennis was just happy having found something he could pick holes in.
As much as you're happy to put fire to the fuel like this :-(.
Please allow me quoting an old pop song: "We didn't start that fire ...". Anyway, back to calculators!

d:-)
For me some other vision of design for a calculator. It should be more compact, but with a large enough keyboard and display. Not more than three functions (inscriptions) associated with the key must be shown in the keyboard itself.

Got only this far. I put the project to drawer for now (propably indefinedly).

http://i.imgur.com/jxV6sq5.png
(03-18-2016 08:16 PM)compsystems Wrote: [ -> ].....
characteristics
0: [Alpha] an alphabetical key, if not separately included [a], [b], [c]
1: [Left Shift] & [Right Shift] Two keys change, to have more functions on a single key
2: [ESC] KEY with the option of "ON"
3: [NEXT] or [TAB] key to toggle between menus
4: [F1], ... [F6] Function Keys, minimum 6 vertical model, 8 horizontal model
5: [<-] key backspace, with the option of "clear" and "del"
6: keys [(] [)] separately
7: basic keys like [^] [=] [,] [.] [+/-] [SPACE]
8: Cursor key [<][>][v][^] , with the option of "|<" , "||<", ">|" ,">||", etc
9: [ENTER] enter key a little wider than the others, but not covering two keys
10: Others [CATALOG] [VARS] [HOME (NUM)] [HELP] [CAS]

I agree with all the points in the list. This is a logical way, derived from the requirements for a scientific calculator. Also add:
0: all menus must have no more than two pages with 8 items in each page (maximum) - for reasons of user convenience
1: one-two labels above the keys
2: add other functions depending on screen size, memory and your imagination
3: screen: size 240x64 (non graphic) or 240x160 (advanced) with three gray-scale levels (white-gray-dark)