A power supply is hardware (and sometimes may include software or drivers) that provides electric energy to an electric load. It may obtain its power from a transmission system, for instance power supplies that convert AC currents to DC, from storage devices such as cells or batteries, or from systems like alternators or generators. Power supplies can be integrated with their loads, or consist of stand-alone appliances. A low-voltage supply, such as a 12v DC power supply, is usually integrated … [Read more...]