I am in the process of making a synthesizer based on the open source Eurorack project. I want to use pre-existing circuits but go through the full pcb design process for each module on my own, that way I can add some flare to my synthesizer. This power supply I created takes a 12VAC input and converts it to 12VDC.
This circuit is based on the design by Music From Outer Space, linked here. The design uses filtering capacitors and half wave rectifiers to deliver a consistent output ~12V.
 Here's the schematic:
This is the final PCB design I ended up with, pulled directly from KiCAD.