undergraduate project

It is very difficult to make recommendations using only the sparse information in your message; it resembles a question like "how long is a piece of string"! But I'll "give it a shot".

I don't know where you are going to school, or what the school's requirements are, etc. Generally, though, a senior project is used to discover if you have the ability to take all the 'stuff' you have learned, all the math, physics, electronics, etc., and use them to put together a project.

The best choice would be something you really enjoy. Was there a subject in your classes which you found especially interesting and wanted to do? Or is there something in your "life" that you want to explore?

I had trouble figuring out what to do when I did my project. That was long, long ago... At that time, digital equipment and appliances in the home were a big novelty; everything was analog and most were mechanical (timers, controls, etc.). So, I decided to do a digital AM/FM receiver and amplifier. It had an unusual tone control setup and an LED readout (I worked at HP before going back to school, and I had a lot of "stuff" that HP let me have, which was from prototypes, discards, etc. It was HP's policy to let employees take what they wanted from a large box which was regularly filled with all sorts of high tech stuff, and was the source of most of my parts...).

I chose that project because it was something I was interested in at the time. I put in many hours and built what I thought was a masterpiece, and it worked perfectly when I demonstrated it to all the other students and faculty in a large meeting. I got an A, but a girl student got an A+ for a six page report on batteries! But, that was her choice and her interest, so she must have done an excellent job to get that grade.

So I'd suggest that you think about things you are interested in and come up with something you want to design and build. For me, that process was extremely enjoyable. I hope you do OK.

Koz