I have supervised students as they created new equipment for their family farm, and other students who have designed and built parts for musical instruments. I have some conditions, though. You must agree to start working on your project during the summer break. You can take a month or so off after the November exams but you have to start work on your project in January of your final year. BUT you have to at least start searching the web and having regular contact with me.
Final year is very stressful and it is good to get a head start on the project itself.
You must agree to meet me at least once every two weeks during the year, even if you have nothing to say. Because part of my job is to quickly get you to a position of strength so that you can feel good about your project. I have observed that students who disappear for months at a time usually end up depressed and in trouble. You must agree to build something and do some kind of real experiment during your project. I will no longer accept projects that are purely theoretical or are only on paper.