Physics competition project ideas?

I will be going on a physics competition next year and I am wondering what project to do. I would like it to be pretty complex and to be based on electricity. If it helps i am in high school and i can get the help of my professors and the other projects on the competitions are also fairly complex. So far I have come up with and idea for a oscilloscope even though i dont know about the CRT how would I make it, but still not a bad idea. If anyone has anything better please comment. Also I have experience with electronics if it helps.