What Is DC Power Supply Used For?

Electricity comes in two main forms: alternating current (AC) and direct current (DC). DC current has the flow of electricity going in only one direction (forwards), whereas AC current has the electricity going in two directions (backwards and forwards). DC current is easier for smaller devices to utilize and is the most common method of power supply for anything that runs on battery power as well.

Most electrical power from a wall outlet comes in alternating current form

Alternating current must be converted to direct current (DC) by a rectifier.

DC current is commonly used to power small electronics

Many devices, such as computers, stereos, and other smaller electrical appliances have their DC converting rectifier built right into the device.

Batteries also supply a DC current, so any device that uses batteries also utilizes a DC power supply.