12v 1a dc can convert high voltage alternating current (AC) from a wall outlet into low voltage direct current. That is safe for many types of electrical apparatus- without being big and bulky. The main function of this adapter is to provide dc voltages at a current capacity of 1 ampere cheetahs so as needed for devices of these values, up to 12型直流稳压电源 Device Great technological features of this adapter include protection against short circuits, protection against overvoltage, and a small and beautiful appearance meaning you can easily plug any socket in without blocking other sockets. Its functions can be extended to LED lights and small electric appliances after being rectified through an LED diode bridge But it doesn't stop there!aterial systems with photovoltaic cell or thermoelectricity generation (TEG) self energies also produce inputs over such low voltages.