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Pi84 - The Raspberry Pi powered TI-84+

Started by DarkestEx, December 17, 2016, 01:13:19 pm

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DarkestEx

December 17, 2016, 01:13:19 pm Last Edit: December 17, 2016, 02:10:36 pm by DarkestEx
Hello together!

This is my second go on a Raspberry Pi hearted TI-84+. (Note to mods: I really want to make this a new project without any affiliation to the old so I need a new topic).

I have decided for an early hardware version of the 84+ as it's PCB can be cut smaller than on the new versions.
For the keyboard and power management, I am going to use a Teensy 3.2 that will hook up to the 84+'es matrix.



The Raspberry Pi Zero is the perfect solution for the CPU since it is the smallest and the least power-hungry of all Raspberry Pi's.
For the power supply I will be using a slim power bank or an old Samsung Galaxy S3 mini battery (depending on how much space I have left).

To keep the authenticity, I am sticking to a monochrome LCD, however, mine is 128x64px and has the same physical size as the original screen:

Juju

That looks real interesting, can't wait to see it done.
Read Zarmina!
YUKI-CHAAAANNNN
In the beginning there was walrii. In the end there will be walrii. All hail our supreme leader :walrii: --Snektron



if you wanna throw money at me and/or CodeWalrus monthly it's here

DJ Omnimaga

Nice, is that a backlit LCD? I am curious about if the entire calc keypad will be functional?

DarkestEx

December 17, 2016, 10:03:11 pm #3 Last Edit: December 17, 2016, 10:32:23 pm by DarkestEx
Quote from: Juju on December 17, 2016, 07:51:26 pm
That looks real interesting, can't wait to see it done.

Thanks, I'll keep you all updated :)

Quote from: DJ Omnimaga on December 17, 2016, 09:05:18 pm
Nice, is that a backlit LCD? I am curious about if the entire calc keypad will be functional?

No, I will be removing the backlight as there is no space for it. But yes, the entire keypad will be functional. It will even get mouse emulation.

So I have now also created a better graphic of the keypad matrix:


Just compare it with the Sharp one XD:


DJ Omnimaga


p2

*pretending I dont know you killed a functional calc for that project*  :ninja:

it looks really interesting!! :D
Can't wait for an update @DarkestEx :)
Anyway war sucks. Just bring us your food instead of missiles  :P ~ DJ Omnimaga (11.10.2016 20:21:48)
if you cant get a jframe set up, draw stuff to it, and receive input, i can only imagine how horrible your game code is _._   ~ c4ooo (14.11.2016 22:44:07)
If they pull a Harambe on me tell my family I love them ~ u/Pwntear37d (AssangeWatch /r/)
make Walrii great again ~ DJ Omnimaga (28.11.2016 23:01:31)
God invented the pc, satan the smartphone I guess ~ p4nix (16.02.2017 22:51:49)

DarkestEx

December 19, 2016, 10:11:21 am #6 Last Edit: December 19, 2016, 12:49:16 pm by p2
Quote from: p2 on December 19, 2016, 09:54:31 am
*pretending I dont know you killed a functional calc for that project*  :ninja:

it looks really interesting!! :D
Can't wait for an update @DarkestEx :)

I scrapped about 4 calcs so far for this reiteration of the project.



Edit by p2: removed the "Sent from my BlackBerry DTEK50"

p2


:'(  :'(  :'(
where do you take the money for all those calcs...? xDIt has to be like 300-350€ for them? xD

btw is the 84+SE still produced? Or are you sacrificing the last ones of a dying species...?  :ninja:
Anyway war sucks. Just bring us your food instead of missiles  :P ~ DJ Omnimaga (11.10.2016 20:21:48)
if you cant get a jframe set up, draw stuff to it, and receive input, i can only imagine how horrible your game code is _._   ~ c4ooo (14.11.2016 22:44:07)
If they pull a Harambe on me tell my family I love them ~ u/Pwntear37d (AssangeWatch /r/)
make Walrii great again ~ DJ Omnimaga (28.11.2016 23:01:31)
God invented the pc, satan the smartphone I guess ~ p4nix (16.02.2017 22:51:49)

CVSoft

Quote from: p2 on December 19, 2016, 10:15:26 am
btw is the 84+SE still produced? Or are you sacrificing the last ones of a dying species...?  :ninja:

It's still in production by Kinpo Philippines.

DarkestEx

December 19, 2016, 11:52:32 am #9 Last Edit: December 19, 2016, 12:49:05 pm by p2
Quote from: p2 on December 19, 2016, 10:15:26 am

:'(  :'(  :'(
where do you take the money for all those calcs...? xDIt has to be like 300-350€ for them? xD

btw is the 84+SE still produced? Or are you sacrificing the last ones of a dying species...?  :ninja:

I have about 6 working 84+ and 2 broken ones.
Some i bought on eBay but most ones from my previous school which is of course getting rid of them as Germany is moving away from graphic calculators.







Edit by p2: removed the "Sent from my BlackBerry DTEK50"

p2

how much do you pay for them aaand if they want to get rid of another load, do you think you could contact me? I'd take a few as well O.O
Anyway war sucks. Just bring us your food instead of missiles  :P ~ DJ Omnimaga (11.10.2016 20:21:48)
if you cant get a jframe set up, draw stuff to it, and receive input, i can only imagine how horrible your game code is _._   ~ c4ooo (14.11.2016 22:44:07)
If they pull a Harambe on me tell my family I love them ~ u/Pwntear37d (AssangeWatch /r/)
make Walrii great again ~ DJ Omnimaga (28.11.2016 23:01:31)
God invented the pc, satan the smartphone I guess ~ p4nix (16.02.2017 22:51:49)

DarkestEx

December 19, 2016, 12:45:18 pm #11 Last Edit: December 20, 2016, 03:36:30 pm by p2
Quote from: p2 on December 19, 2016, 12:03:21 pm
how much do you pay for them aaand if they want to get rid of another load, do you think you could contact me? I'd take a few as well O.O

You could buy one cheap if you really wanted ;)

Btw for the second Calc I am using a currently still fully working casio classpad:


So to clear it up, I am building two calcs. One ti84 and one with the classpad. But the classpad one is not for me.


Edit:








Edit by p2: removed the "Sent from my BlackBerry DTEK50"

DarkestEx

July 14, 2017, 02:49:55 pm #12 Last Edit: July 14, 2017, 02:52:24 pm by DarkestEx
Hola!

I have an update for y'all!

The display is now finally installed and working. ;D
I have also drafted the schematics and ordered the missing parts.

Let's get this one made!







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