yeah man i have been in this course and the projects given by our instructor for fatec PLC were:
1-electrical road signes (red/green/orange for cars and red/green for people) for an intersection with priority to some lines over each other.
2- electrical system of convier and belt and boxing system for tea packets ( multiple actuators ,sensors , safety timers and inupts ... )....
3- A system that controls the an electrical generator in a villa where multiple electrical sources are available and switching between them and turning on generator are automatic + timing for connecting and disconnecing of load , + sensors on diesel and timer and counter for ignition ....etc
hope that helps man
cheers