The Furby is back and has some pretty cool LCD eyes.
First order of biz is to wire the little beast up to dedicated power and put a volume control on the speaker.
Power is provided by 4 AA batteries providing 6 volts or so. Total voltage needed is likely the familiar 5 volts, and the total current drawn by the Furby around 500 mA peak (when all the motors are gearing), so USB-type power supply will work (max USB output is 500 mA).
The best way to activate the Furby from sleep mode seems to be depressing the tongue. A sensor (or two or three?) ar under there and some the pins from the sensor board can be accessed from the underside of the mouth. Three of the most prominent pins got tapped (soldered a 3-wire ribbon cable to them) and one of these seems to wake the Furby when grounded. Now the Furby can be activated using a simply switch, or... using TTL level with a solid state relay.
Next up is hooking a Arduino up to control (or at least wake and auto "feed", "tickle" and "pet") the Furby. Capacitance sensors are located on the top of the head and around the body to detect petting and tickling/holding respectively.
1.) Furby 2012 tear down (detailed photos of various circuit boards)
2.) Adafruit Furby taxidermy and partial tear down
3.) Ultrasonic sound control protocol description and Perl Library (via Hack-a-Day)