Arduino Upgrade

Hello,

I want to up grade to the Arduino Due for the double precision math. However, the 3.3VDC I/O will not work for my application. Is there a board available that can switch 5-12 VDC @ 2000 kHz using the Arduino Due 3.3VDC? IF I have to use encoder feedback to maintain accuracy then I will need to buck the voltage @ the same frequency.

Will the sketches, 80 character/4 line display and the 4 x 4 matrix keypad from my Arduino UNO revs3 work with the Arduino Due?

Thank you

Is there a board available that can switch 5-12 VDC @ 2000 kHz using the Arduino Due 3.3VDC?

Do you mean digital pin "logic level converter"? if so :
www.adafruit.com

If for analog pin, a bit more complex.

OldRon:
Will the sketches, 80 character/4 line display and the 4 x 4 matrix keypad from my Arduino UNO revs3 work with the Arduino Due?

you can open it, select DUE in IDE Tools/board. If it compile, there's a good chance. If not, It is often only a few change to do to make it work...

Regards.

Nitrof

You should consider a board using Cortex-M7, which has a FPU capable of 64 bit double precision floating point.

On Cortex-M3, 64 bit double is done using software. You can do it, but it's quite slow.