https://sciencewiki.science/wi....ki/Cat_Flaps_For_Fre
https://opensourcebridge.scien....ce/wiki/Fitting_a_Ca
A cat flap is an opening that allows your pet to leave and enter the house at their convenience. It can be incorporated into doors, windows and even walls. It can be opened by pushing through a section of its body. Microchip cat flaps can recognize your cat's unique microchip to unlock the door. Infrared and magnet cat flaps require your cat to wear a collar that has either a magnet or an infrared device that will activate the flaps. What is a cat fl