I'm developing a Soccer robot for the Robocup competition, I choose to implement the Arduino DUE electronics in our own pcb to make it simple and smaller, and also to link devices without any wires, just one pcb for everything.
I made a schematic based on the Arduino DUE board in Altium, and simplified/removed some stuff i wouldn't need...
I know everything has a reason to be there in the Due schematic, but as we don't have access easily to some components we choose to simplify it more (remove some noise filtering inductors/capacitors).
Also, as switching regulators are REALLY expensive in Brasil, we changed to linear regulators (LM7805 and LM1117). I based the schematic on the Ruggerduino board.
What i'm asking is a "review" of what we have done, to go to the next step, that is "do" the robot electronics without any (or a few) mistakes...
Here is the schematic of our core: https://www.dropbox.com/s/cjfyer7xh5p4zru/Processor.pdf
Here is the real Arduino DUE schematic: http://arduino.cc/en/uploads/Main/arduino-Due-schematic.pdf
I apreciate the help!