If you own a cat, you know even if your cat is well brought-up, laws are only valid as long you are at home or even in the same room. The goal of this project was to create a small device, which detects movement in protected areas (e.g. tables) and speak your usual phrases in your voice to the cat.
I documented a working prototype of the project in the hope to share some knowledge and give some ideas how certain details can be solved. It contains schemes for all hardware parts and a detailed description of all software parts, including a minimal implementation of a SD card access.
Please feel free to ask, if you do not understand a part, or if you have any suggestions where to extend the documentation or clarify parts.
Jump directly to the start page of the project documentation here: http://luckyresistor.me/cat-protector/