To do this, all stickers and extra material was removed from the “indoor” hull of the AR Drone. Use the indoor version because it has this night light frame that extends out past the blades to protect them. This was perfect for allowing it to bump into people.
Then made two tracks with aluminum tape around the entire hull. These were connected with wire directly to the capacitor in a disposable camera. Another weight reduction was to remove all extraneous pieces of the camera. Not only did this make it lighter, but it allowed the entire circuit to be hidden inside the hull. Only a little bit of carving was necessary to make enough space.
source : http://hackaday.com/2012/08/27/the-taserdrone-a-shocking-mod-for-the-ar-drone/
