Thanks for the reply mem. I was thinking about maybe using an RC transmitter ... but wasn't sure if I could accurately store & then reproduce that many PWM signals with the arduino.
... I was thinking more along the lines of using at least 2 arduinos:
Arduino # 1 duties:
1) Receive analog input from pots (I realize there are only 6 analog input pins)
2) Spit out serial data to a Pololu Micro Serial Servo Controller
Arduino # 2:
1) "Listen" in on the serial data that arduino # 1 is spitting out
2) Write an exact copy of this data to a memory stick
3) Spit out the same serial data at the same rate it was received (For playback of servos at a later time).
4) Control something like the Daisy Mp3 player by Make ... to have audio synched to the servo movement.
The Pololu Micro Serial Servo Controller can use 2 protocols ... 1 is their own and the other is the Mini SSC II by Scott Edwards. I would prefer to use Scott's because it only requires 3 bytes of serial data opposed to Pololu's 5 or 6 byte sequence.
This would all be used for Halloween animatronic props. I would like to be able to mirror the movements of a human skull at first. Using only 4 servos to begin with: Jaw, Head Left & Right, Head Up & Down, Head Tilt side to side. Later on if I get all this to work, I would animate the arms and possibly the fingers. Maybe control some pneumatic cylinders, RGB LED's for the eyes ... etc.
I don't want to have a dedicated PC running for each prop. I would much rather have a few $20 arduinos controlling the show.
I want to make a "helmet" that I could wear that would provide the potentiometer feedback... that way when the mp3 voice file is playing I can just memorize the words and "lip sing" it all the while moving my head and arms, etc ... probably have another helper that could hit the occasional switch for LED's to light or something.
I believe this is the way Hollywood makes their film animatronics seem so life like. Ibet it saves a ton of time doing it this way.