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Author Topic: RPN-Calculator  (Read 301 times)

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Offline DarkestEx

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RPN-Calculator
« on: February 03, 2017, 10:16:54 pm »
Hello everyone!

For many weeks I have been working on a custom and completely hand-built calculator.

So let's start with some eye-candy first ;D

(click to show/hide)

The Software is still in the works and nowhere near done.
For the CPU I am using an STM ARM CPU which is overclocked to 96 MHz. It also has USB, an SD Card, a Serial / IO port, a 2200mAh LiPo, a Status LED, a Nokia 5110 LCD and a 3x4 keypad.

I hope you like it :)


  • Calculators owned: TI-84+, Casio 101-S, RPN-Calc
  • Consoles, mobile devices and vintage computers owned: Hewlett-Packard 100LX, Original Commodore 64C, Tektronix AWG2021, IBM X60s
<- Check out Claw if you like writing code once and having it run on most embedded devices alike :)

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Offline Snektron

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Re: RPN-Calculator
« Reply #1 on: February 03, 2017, 10:48:23 pm »
Looks pretty impressive :o nice job
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Offline DJ Omnimaga

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Re: RPN-Calculator
« Reply #2 on: February 05, 2017, 04:52:03 pm »
This looks absolutely fantastic and actually professional (old school too lol). Nicely done and I'm glad it's coming to frution. How far from being done is the software? What's functional in it so far?


Does the calculator produce some heat by the way? You could maybe add some holes on the back of the case near the sides for ventilation (although I'm unsure if it would require adding protection against dust).
  • Calculators owned: TI-73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX, HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
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Offline DarkestEx

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Re: RPN-Calculator
« Reply #3 on: February 05, 2017, 06:16:30 pm »
Looks pretty impressive :o nice job
This looks absolutely fantastic and actually professional (old school too lol). Nicely done and I'm glad it's coming to frution. How far from being done is the software? What's functional in it so far?
Thanks a lot ;D
The Software is in a very early stage. I might actually start from scratch again, so that the Software might be used in a future community calculator. If so, I would make it open source from the very beginning on. The Software would still be monochrome Screen only, however, I don't see a huge need for a color screen to be honest.
So far there is a simple four function calc that works well, but has no interesting features except for the Keyboard entry which is working really well and seems to be fairily intuitive.
I forgot to mention that I will be porting Claw to it when that one is ready :)

Does the calculator produce some heat by the way? You could maybe add some holes on the back of the case near the sides for ventilation (although I'm unsure if it would require adding protection against dust).
Actually I don't think it produces any heat really. The only suspect is the screen which is exposed to the outside anyways and can cool off easily and the battery charger, which can cool off after the charge. The CPU is not getting warm.
Thanks for suggesting, anyways. :)
  • Calculators owned: TI-84+, Casio 101-S, RPN-Calc
  • Consoles, mobile devices and vintage computers owned: Hewlett-Packard 100LX, Original Commodore 64C, Tektronix AWG2021, IBM X60s
<- Check out Claw if you like writing code once and having it run on most embedded devices alike :)

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Offline garvalf

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Re: RPN-Calculator
« Reply #4 on: February 13, 2017, 08:28:08 am »
that's very cool and very professional looking! Good luck with the software.
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Offline DarkestEx

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Re: RPN-Calculator
« Reply #5 on: February 17, 2017, 03:46:30 pm »
that's very cool and very professional looking! Good luck with the software.
Thanks! I am actually progressing with said software quite well :)
  • Calculators owned: TI-84+, Casio 101-S, RPN-Calc
  • Consoles, mobile devices and vintage computers owned: Hewlett-Packard 100LX, Original Commodore 64C, Tektronix AWG2021, IBM X60s
<- Check out Claw if you like writing code once and having it run on most embedded devices alike :)

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Offline DJ Omnimaga

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Re: RPN-Calculator
« Reply #6 on: February 17, 2017, 05:28:23 pm »
Glad to see it's progressing. What does still need to be done?
  • Calculators owned: TI-73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX, HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

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