I am thinking of building a small remote control telepresence robot and instead of buying those small mirco cameras, I want to try and build one myself that would also contain a small transmitter that could transmit live video from the camera for a distance of about 200M or so and a reciever which can be plugged into a T.V.

If any one has any ideas, diagrams or websites on how this can be done your help would be greatly appreciated.