This is a project I did a while ago and I have been using since to spoil both my dogs. It is a treat dispenser device built from 4mm plywood, a Picaxe chip to drive a servo-piston and receive commands wireless through a blue-tooth serial module. An android app is used to control the dispenser.
Here are the project's details: http://steliosm.net/site/?Projects:BlueTooth_Treat_Dispenser
Here are the project's details: http://steliosm.net/site/?Projects:BlueTooth_Treat_Dispenser