My senior design project, EE400D, was an uninterruptable power supply. The final prototype consisted of a power supply, DC-DC Buck converter, battery bank and over-voltage protection circuit, and a quasi-square wave H-bridge inverter. For the technical information like design and testing, see the report below.
Inverter circuit on Breadboard
Working inverter quasi-square waveform output
Full working prototype
Battery bank, charging circuit, power supply, and DC-DC buck converter