Can you give me ideas for my graduation project?

I'm a mechanical engineer, need ideas for graduation project.

@beshir - Have you searched the Internet for ideas? There are plenty of ideas, could you pick possible ideas you'd like to work on so that we can help you finalize one from those ideas?

All exercise bikes and treadmills use friction to increase stress level. You can design a power generator train that does the same job and generate power.