The two current widgets. The Xbee client is in the upper right hand corner- it sports wireless bidirectional communications following the 802.15.4 protocol. FCC approved, 300 ft range. It controls servos, motor controls, discrete outputs- lights, solenoids. Also has a serial input for an RFID reader. Additional inputs are available for current sensors or distance/speed sensors. This is my locomotive Frankenstein. I am really happy how this has turned out. I’m working on a set of simple PCBs so all of this can be just soldered in. (soldered and wired breadboards are a pain sometimes)
In the center is the sound widget. Up to 200 stereo mp3 files can be triggered from R/C inputs or discrete buttons presses or switches. You can put ridiculously large SD cards into it. Like 32G of sounds. You can trigger music, sound efx, whatever you want. A 1 watt amplifier is onboard- more than enough to drive a large speaker.