Most of the sensors can be accessed from the motor driver board which also is a hub for many of the sensors leads (3 pins for capacitive touch, 6 pins for orientation).
One question is how much control can be achieved via stimulating these various sensors. Can the eyes be controlled to look in a particular direction (via tilt sensor); Furby will look up when the head capacitive sensor is stimulated.
Using a solid state switch that is activated via TTL, the Furby can be modded to do some weird shit:
The green light is from the Arduino pin 13 LED, the white light signals the solid state relay firing. PIR sensor in front. Red LED stays on for a while after motion detector is first triggered. When LED goes out, any motion will trigger the solid state relay (white light flashes 2-6 times, indicating relay switching 2-6 times- currently attached to the tongue sensor). With no motion (or other stimuli) for 2-3 minutes, Furby goes into sleep mode again.
Orientation sensor wires:
Force feeding the little beast:
After too much continuous stimulation
the little beast has just about had it.
Thank god it was securely tethered the whole time.