Hardware Secrets has posted an article on power supply internals: how it works, what are its main components and how to identify them.
Power supplies used on the PC are based on a technology called "switching mode” and thus are also known as SMPS, Switching Mode Power Supplies. In this tutorial we will explain you how switching power supplies work and we will provide a journey into the PC power supply showing you its main components and what they do.Anatomy of Switching Power Supplies
