Power Supplies

A power supply is an electrical device that supplies power to an electrical load. The main function of the power supply is to convert the current from the power supply to the correct voltage, current, frequency and supply power to the load. As a result, the power supply may be referred to as a power converter. Some power supplies are standalone standalone devices, while others are embedded in the load devices they feed. An example of the latter is the power supply for desktop computers and home appliances.

The power supply is packaged and classified in various ways. Benchtop power supply is a standalone desktop for applications such as circuit testing and development. The open frame power supply unit has only a partial mechanical housing and it may consist only of the mounting base, but these are usually built into machines and other equipment. The rack power supply is designed to be mounted in a standard electronics rack. An integrated power supply is a power supply that shares a common printed circuit board with its load. The external power source, AC adapter, or power brick is the power supply in the AC power cord of the load plugged into the wall outlet, the wall Γ is an external power source that is integrated with the socket itself. Because of their safety they are very popular in consumer electronics and the dangerous 120 or 240 volt supply current is converted to a safer voltage before entering the main body of the instrument.