I do not quite understand why the adapter, if the outlet also has AC. Or synonymous with Playstation 2. Is it that.
He adapts the alternating current (AC)
… And converts it into direct current (DC) for the devices that work with DC. Each battery or each battery is indeed DC and must be loaded with such.
In addition, the dangerous 230 volts are converted to harmless low voltage, which greatly simplifies the safety precautions of the devices, ie the insulation or protection against contact.
Transformer, power adapter, adapter… These words are often thrown together wildly.
Very few electronic devices can handle the mains voltage (in Germany 230 Volt and 50 - 60 Hertz).
The power supply of your laptop does the same thing as the power supply of a "big" PC: it turns the mains voltage into a voltage that your computer can work with.
Such a delicate construct as a CPU or the memory of your computer could not work at all with 230 volts, because between the closely spaced tracks immediately sparks would jump over and destroy the component.
The microelectronics require DC voltage of low size.
In order to be able to operate this on a normal alternating voltage network, I have to adapt (adapt) the requirements of my microelectronics to the supply size. (You can also understand it confidently vice versa, the AC voltage adjuster adjusts the AC voltage to the needs of the device).