CodeWalrus

Development => Hardware => Topic started by: DarkestEx on February 03, 2017, 10:16:54 pm

Title: RPN-Calculator
Post by: DarkestEx 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
(http://i.imgur.com/egSUkFf.gif) (http://i.imgur.com/d5Rsl9L.jpg)
(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 :)
Title: Re: RPN-Calculator
Post by: Snektron on February 03, 2017, 10:48:23 pm
Looks pretty impressive :o nice job
Title: Re: RPN-Calculator
Post by: DJ Omnimaga 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).
Title: Re: RPN-Calculator
Post by: DarkestEx 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. :)
Title: Re: RPN-Calculator
Post by: garvalf on February 13, 2017, 08:28:08 am
that's very cool and very professional looking! Good luck with the software.
Title: Re: RPN-Calculator
Post by: DarkestEx 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 :)
Title: Re: RPN-Calculator
Post by: DJ Omnimaga on February 17, 2017, 05:28:23 pm
Glad to see it's progressing. What does still need to be done?
Title: Re: RPN-Calculator
Post by: DarkestEx on February 27, 2017, 06:00:29 pm
I have added most functions that CW-members suggested to me.
Currently, all basic scientific calculator functionality is present:
(click to show/hide)

I will make a Video soon :)
Also, I am working on a snake game that will run on said calculator.
Title: Re: RPN-Calculator
Post by: WholeWheatBagels on February 27, 2017, 06:08:49 pm
How are symbols and stuff entered if there is only the simple numpad?
Title: Re: RPN-Calculator
Post by: Snektron on February 27, 2017, 09:52:13 pm
Cool! Will you also add graphing functionality?
Title: Re: RPN-Calculator
Post by: DarkestEx on February 27, 2017, 10:10:31 pm
Cool! Will you also add graphing functionality?
Thanks :)
I am indeed planning to add graphing functionality. But none of the complex algorithms though.

How are symbols and stuff entered if there is only the simple numpad?
That's actually one of my favorite parts. All the menus are very conveniantly organized. Have a look at the video below :)

https://www.youtube.com/watch?v=xD4iRr9QoC8
Title: Re: RPN-Calculator
Post by: Juju on February 27, 2017, 10:14:29 pm
That's a pretty cool thing here :D
Title: Re: RPN-Calculator
Post by: DJ Omnimaga on February 27, 2017, 11:50:53 pm
OMG... if the screen was black with slightly larger res+terminal green fonts, this would totally look like one of those devices from early 80's sci-fi movies. I like it so far as it is, though, and I like the backlit screen. Good job so far :)