Senior Year Project

Hello fellows engineers. I am currently on my way to earn my Bachelor in electrical engineering. However to be able to graduate I must complete a "Final project" as you know. I am interested in getting some of your ideas regarding efficient projects.
My work could include: the design of analog and digital electronic systems, design and operation of power systems (generation, transmission and distribution), design of auxiliary models to stabilize and/or modify the dynamics of systems (autopilot of aircraft, on-board control systems of automobiles), design of devices for telecommunication systems (cellular phones, microwave links).

I am looking forward for your ideas.
All the best

A design that isn't too difficult, but is difficult enough for your Final Project, may be a switching power supply.