Want to add audio and lighting effects to your R/C car?  The R/C Animator uses a Propeller Platform USB to read servo signals and play special effects.  Gadget Gangster writes;

R/C Animator triggers effects based on the position of the servos in your vehicle.  So, you can trigger the playback of a rumbling V8 when the throttle servo opens up.  Or you could connect a spare servo channel to the R/C Animator to turn on an LED ‘light bar’ and play a siren. Effects include;

Sound playback
Up to 32GB of audio samples can be stored and played back in CD quality stereo.  An onboard audio amp will drive speakers up to 1/4 Watt.

LED animation
Up to 25 LED’s can be turned on, blinked, or faded.

Secondary servo movements
Multiple servos can be directly controlled by R/C Animator, so a single wireless channel can trigger secondary servo animations

R/C Animator is designed to chain and combine these effects.

Code and assembly on Gadget Gangster and Instructables.