Hello, did you had a look to Github 14-digits-nixie-calculator <https://github.com/axtar/14-digits-nixie-calculator> ? there should be some idea to find...
Le samedi 28 décembre 2024 à 08:23:43 UTC+1, newxito a écrit : > I think that even without changing any board, it shouldn't be that > difficult to make a RPN version with scientific notation. > Replacing some key caps, replacing one of the nixie sockets with a > horizontal neon and changing the firmware should do the trick. I probably > will give it a try next year. > > Mac Doktor schrieb am Freitag, 27. Dezember 2024 um 23:08:44 UTC+1: > >> Some random thoughts... >> >> >> On Dec 27, 2024, at 3:20 PM, newxito <[email protected]> wrote: >> >> - What happens if I enter 12.999? Is that even possible? >> >> >> - For subsequent calculations, does it use the displayed value or the >> entered/calculated value with all decimal places? >> >> >> In fixed mode my RPN calculator displays everything you enter and then >> truncates that to two decimal places on both the display and internally. >> It's commonly used for financial calculations so I would assume it's >> rounded up. >> >> >> - How is a result like 1234567890.65 displayed? 34567890.65 and overflow? >> 1234567890 with no decimals? Something else? >> >> >> Normally you'd use scientific notation for floating point operations with >> lots of decimal places: >> >> 123.456 = 1.23456E2 >> >> The snag here is that you don't have "E" or a minus sign for numbers < 0 >> without alphanumeric tubes. Problematic. >> >> I suppose you could at least use neon lamps and optic fibers to create >> decimal points. Commas would be cute. >> >> >> What would really interest me is an RPN calculator. My beloved HP is out >> of production and used ones are going for $125 on eBay. I programmed in >> FORTH back in the day (Apple ][+; I still have it) and became very >> comfortable doing stack-based math. Once you get used to RPN you never go >> back. >> >> With alphanumeric tubes you can also do hexadecimal, the other thing that >> I'd like to be able to never go back from. I hope that last sentence makes >> sense. RPN, hex, I'm there. >> >> >> Terry Bowman, KA4HJH >> "The Mac Doctor" >> >> https://www.astarcloseup.com >> >> "Would you like to see the relevant data?"—343 Guilty Spark, *Halo 2* >> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/cc20a2af-ac42-45cf-8f2b-8a170afc83can%40googlegroups.com.
