So I am trying to build my own TI-84 inspired calculator and it has some special needs. For starters I need a 64x128 screen, I'm thinking about this one but don't know if there are better ones out there. https://www.sparkfun.com/products/710
Also I need to run 50 different buttons and run all of it off of 4xAA batteries. I'm thinking about using the teensy 3.1 or TI Launchpad but don't know if they can handle the I/O I will need. Any suggestions?
You may want to get this instead. 128x64 LCD Graphic Display with Serial & I2C Controller kit, this only uses 2 pins, A4 and A5. As for your keypad, you simply need to download the Keypad library. 50 buttons = 15 pins. OR, you can use just one pin, but you will need about 50 resistors. And yes there is a different library made for that particular keypad. Note: the playground was changed and I am unable to find the library. Found it. HERE
Board wise, a Nano, Mini or Micro, should be prefect for your needs.
HazardsMind:
You may want to get this instead. 128x64 LCD Graphic Display with Serial & I2C Controller kit, this only uses 2 pins, A4 and A5. As for your keypad, you simply need to download the Keypad library. 50 buttons = 15 pins.Board wise, a Nano, Mini or Micro, should be prefect for your needs.
Thanks, I'll look into getting that screen.