awyea
Posts: 4
Joined: Thu Jul 26, 2012 12:00 am

PiCalc

Sat Nov 03, 2012 6:27 am

So my idea for a project was spawned from this guy's product
http://antipastohw.blogspot.com/2010/07 ... wsw-r.html
and the fact that I refuse to pay $150-$200 for a ti-89 (the same price as a ti-nspire) when I can buy a nice touch screen tablet for less.
So...I remembered that there is an amazing program known as octave, runs right out of the box with pi and I wanted to build an open sourced calculator around the project.

These are my goals
- 1st and foremost... make it look as much like a calculator as possible, preferably not voyager sized
- 2nd...cost $100 or less
- 3rd...decent battery life
- 4th... able to do everything a ti-89 can

I'm looking into a touchscreen digitizer to use for a keypad so I can customize the buttons and their layout. I also found a usb driver board that should work with it.
I plan to try and power the pi with 8 NiMH AA batteries that spec in at 3000mA each
I made a parts list from ebay

http://www.ebay.com/itm/230860555226
http://www.ebay.com/itm/280802801516
http://www.ebay.com/itm/260905608582
http://www.ebay.com/itm/271076782532?var=570118167926
http://www.ebay.com/itm/271093581742
http://www.ebay.com/itm/280972917133
http://www.ebay.com/itm/330594387860

total cost is about $75 without the pi. Before I order, I'm hoping to get some feedback, especially with powering both the screen and the pi, the screen itself, and the touch screen digitizer setup.
- Let me know what you think

User avatar
Joel_Mckay
Posts: 295
Joined: Mon Nov 12, 2012 10:22 pm
Contact: Website

Re: PiCalc

Sat Jan 05, 2013 3:55 am

Have you tried:

Code: Select all

sudo apt-get install tiemu 
Note octave is very easy to learn too, and is free to use.

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