TI-Nterface
(Temporary name for this project. Don't sue me TI :'()

My profile essay for school is about an interface that connects a system board to the TI84+. As you can see I have made a design. This is the first design which consists of: -4 digital inputs -2 digital outputs -a special bus for power supply and ground to the system board. -I/0 port for communication. It slides over the TI84+. It has an embedded jackplug so you dont have to own a 83 linkcable. This version is probably slightly smaller than the ultimate version, because there is now way that I can fit all the electronics in such a small box Apparently I can thanks to arduino This is an image of the systemboard I want to connect to the TI 84 +.

Some of you might have seen my TI indication led's. This thing was inspired by that piece of equipment. With this device I will eventually demonstrate the full power of the TI 84+!!


Planned features:
-Basic (de)multiplexing algorithm written in C for the PIC microcontroller.
-Realtime data transfer
-Software written in AXE on the TI84+(I already know how to use it, so it might save some time...)
-Some moar awesome stuff such as indication led's and some sort of midi

I hope you like this When I have more information about the project I will update this topic!



Message to all haters mentioning the vernier labPro. Labpro interfaces cost 3 times as much as the calculator itself and they are big. They wont slide over your TI and they are ugly The software included uses you calculator as a display instead of a digital device that can respond to certain changes in the digital signals. My interface will use more processing power of the TI84 so that the interface can be made cheaper than the TI 84+ itself.
Any questions?

looks nice

COOL! I love it!

Quote from: t0xic_kitt3n on September 10, 2011, 12:54:07 pm

That sounds really cool. I wonder if schools would use it if it ever took off? (Then again, schools still use TI's 84+ emulator which they have to buy, when there is many free emulators available that do just as good a job.)

Or better.

I guess so, but all I've seen teachers use it for is math, so basically any emulator is the same in that regard.

Well, my math teacher uses one with a smart board so that everyone can see what she is doing.

If it uses a pic, is it possible to use a protocol like i²c on a port so we could easily make custom hardware? I've had some trouble interfacing i²c directly with the link port.
EDIT: punctuation fixed?

Well I don't know. I am going to ask for help for the I/O interface communication on the TI-nterface (interface in an interface )

The system board won't explode. Thats the last thing I'm worried about   I have designed an experiment to monitor the state of the linkcables during file transfer.