[gixxy]

What 3946 did was use an Arduino and two XBees to make a remote control T-shirt launcher.

All the code for the Arduino (and I believe the Firmware for the XBees) is avalible on our github: https://github.com/frc3946/MobileAirCannon

What we did was have the XBee standalone in the controller, using its dedicated IO lines as inputs. Then we had the XBee on the Arduino sending that data from the Controller to the Arduino via Serial. Then I made some breakout boards for PWM (S + -) and Relay (A B -) ports.

Here is the hardware we used:
Arduino Leonardo (an Uno or Mega would work just as well): https://www.sparkfun.com/products/11286

2x XBee Pro S1 https://www.sparkfun.com/products/8742

Arduino XBee Shield: https://www.sparkfun.com/products/12847

XBee Explorer USB (For Programming XBees): https://www.sparkfun.com/products/11812

XBee Explorer Regulated (For use in Controller up to 12volts): https://www.sparkfun.com/products/11373

The rest are just buttons, joysticks, battery holders, and switches to make the controller, and some perfboard and headers for the additional breakout headers.