A power supply is an electrical device used to provide electrical supply to electrical loads. For this, it converts the power from an electrical outlet into the requisite current, frequency, and voltage to offer the required load. Power supplies are also called electric power converters, and there are two types:

There are two types of power supplies: Direct Current (DC) and Alternating Current (AC). Both have their share of pros and cons in how they are made and how they can be utilized. The prime advantage of AC power is that it is relatively easy to transport over a distance.

A power source should not be confused with a power supply. The source is the point of origin of the power or electricity you receive, usually a battery, an outlet, or a generator. Power supplies convert the power from the source into the correct voltage for output, so select one based on its function and your requirements.