Here is a guide specifically for the electronics for my R2-D2 project. Below are some diagrams of my electronics and here is a guide for my handheld controllers.
R2 Arduino Codes Available HERE
R2 Handheld Controller Guide HERE
Main Body Diagram
Dome Holo Projector Diagram
Parts List
Arduino Uno X3 (https://www.adafruit.com/products/50)
MP3 Music Maker (https://www.adafruit.com/products/1790)
XBEE X2 (https://www.adafruit.com/products/128)
XBEE Adapter X2 (https://www.adafruit.com/products/126)
Robo Claw 60×2 (https://www.servocity.com/html/roboclaw_2x60a_motor_controlle.html#.V0ero5MrKu0)
Robo Claw 2×7 (https://www.servocity.com/html/roboclaw_2x7a_motor_controller.html#.V0ertZMrKu0)
Other Parts:
Speakers
12v Audio Amp
Dome and Drive Motors
You will need to setup your XBEEs to talk on a different channel than stock, pick a unique one so they dont interfere with others. Also you will need to setup your roboclaw to accept two inputs like I talked about. I believe this is mode 4, but there is a guide when you buy your roboclaw. Other than that, everything should be self explanatory.
