After a quarter of working with EAGLE on designing different functional PCB's, me and a team of peers created a device that converted digital data to analog audio signals that the you can hear. This was a fantastic entry into the realm of PCB design as it was a project relevant to real life while still being doable by a group of learning students with a time constraint. Almost all mobile devices have DACs built into them, however these DACs will have at least 16-bit capabilities compared to our 4.
See the full report here
This PCB project was a part of a larger group effort to create a Rube Goldberg Machine. The PCB component of this required us to create a light detector relay that would flip when it detected the activation of the strobe circuit we had running in tandem. Once a certain threshold of light had been detected(determined by connected arduino), the relay would activate and allow any series of outputs to get a positive signal.
See the full report here