110/120vAC mains sent through a full bridge rectifier, filtered and a zener off-loading for anything over 120vDC. In theory or in practice, what would be the worst-case scenario relating to risks (both component and/or injury) assuming the unit was fully sealed save for ventilation? I've been working on different approaches to a project (low-current) and thus far this seems to be the most efficient direction to take in regards to energy waste (heat, hysteresis, etc.) but I'm fishing for input from others if there's anything I'm overlooking. Thanks!