I am working on a project for a team at school that involves communicating with a computer to a car. On the car is an Arduino mega 2560 and multiple sensors. Although I am rather new at this, I understand how to use the few sensors we plan on and have done simple sketches on the Arduino. I also would like to design and fab a shield, more for learning than practical purposes.
1) I am confused because i do not know whether the xbee shields that exist are Arduino mega compatible.
2) Also, if I was to design my own shield, what pins would xbee connect with the arduino? I know the mega has separate communications pins that the UNO does not, whould I use those? Also, what circuitry is required, I know a 3.3v power and were to put it, but everything else I am confused about.
3)And third, I am very new to eagle cad and have used Fritzing before but it has its limitations. How do I get the correct spacing for the pins and other components?
Here is a Tinycad generalization of what I want, correct me if I am wrong with the schematic .