Okay, so I know this does not follow the full brief of the business card contest however I thought I would share it anyway since the board happens to be the right size.
This was a group university project called Aptos where I was responsible for designing and creating firmware drivers for a flight computer which would control active canards (fins) that vertically stabilise a rocket.

This is actually the first time I have ever created a PCB myself, and I was excited but also slightly terrified. Turns out that with a bit of support from some Phil'sLab videos and a bit of careful work its not too bad and very rewarding.
We were able to successfully launch the rocket in April to a height of 400m.

Check out a video about the project here: https://www.instagram.com/reel/C74SY_rNm3n/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==
Check out the website about the project here: https://leedsrocketry.co.uk/projects/aptos/