Pi84 - The Raspberry Pi powered TI-84+

b/Hardware publicado por u/DarkestEx December 17, 2016, 01:13:19 PM

Pi84 - The Raspberry Pi powered TI-84+

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:

Last Edit: December 17, 2016, 02:10:36 PM by DarkestEx

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u/Yuki December 17, 2016, 07:51:26 PM

That looks real interesting, can't wait to see it done.

u/Dream of Omnimaga 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?

u/DarkestEx December 17, 2016, 10:03:11 PM

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:

Last Edit: December 17, 2016, 10:32:23 PM by DarkestEx

u/Dream of Omnimaga December 18, 2016, 01:20:14 AM

Nice Bejeweled clones

Just kidding

u/p2 December 19, 2016, 09:54:31 AM

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

it looks really interesting!!

Can't wait for an update @DarkestEx

u/DarkestEx December 19, 2016, 10:11:21 AM

Quote from: p2 on December 19, 2016, 09:54:31 AM
*pretending I dont know you killed a functional calc for that project*

it looks really interesting!!
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"

Last Edit: December 19, 2016, 12:49:16 PM by p2

u/p2 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...?

u/CVSoft December 19, 2016, 10:47:21 AM

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...?

It's still in production by Kinpo Philippines.

u/DarkestEx December 19, 2016, 11:52:32 AM

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...?

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"

Last Edit: December 19, 2016, 12:49:05 PM by p2

u/p2 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

u/DarkestEx December 19, 2016, 12:45:18 PM

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

You could buy one cheap if you really wanted