The project was to build a fully functional & operational industrial sequencer, which includes PLC controller -Festo CPX CEC-C1. It includes several reed, optical, inductive & capacitive sensors, all placed and adjusted so that they work flawlessly in sequence. Not to mention that the brains behind this prototype was a software ladder diagram, built in CodeSys 4.0, with digital timers and counters. How the whole process look like you can check out in the link bellow: https://drive.google.com/open?id=1pIYZOsYrQQmyIpm6a5Vw2SC2v0P-VsKk