RC Servos are the "muscles" that make the moving parts of the animatronic do something.
A Parallax USB Servo Controller
is the interface between the computer and the servo motors.Visual Show Automation
runs the show & tells the servo controller what to do.
The servo controller circuitry is powered via USB, but requires an external power supply to run the servos.Audacity
can be used to record & edit the sound track.