1. Suitable for the development of small equipment, with a variety of specifications of center needle selection; 2. With a variety of contour size selection; 3. Meet the requirements of ROHS directive; Power supply - Usually a DC source that is itself controlled by another AC source such as a 120 v, 60 Hz line. Therefore, this type of power supply can be considered as AC - DC conversion copy. An AC source that provides a constant frequency, a constant amplitude, from a DC source is called a inverter. Some power sources are controlled by a DC source. The well can produce energy at different DC levels. Such power sources are called DC-DC converters. Rectifier: converts AC voltage to pulsating DC voltage and allows current to flow in only one direction; Low-pass filter: In the rectified waveform can suppress the pulsation, and let its DC (mean) component through; Voltage regulator: can maintain fully stable voltage output under the condition of changes in on-line voltage and load current through the power supply.Video and audio products, notebook, tablet, communication products, household appliances Security products, toys, computer products, fitness equipment, medical equipment Mobile phone stereo design, earphone,CD player, wireless phone, MP3 player, DVD, digital products dc socket is a kind of socket with computer monitor special power supply, it is composed of transverse jack, longitudinal jack, insulation base, fork type contact shrapnel, directional keyway, two fork type contact shrapnel is located in the center of the base, into a vertical and horizontal arrangement is not connected. One end of the fork type contact shrapnel is a wiring port, exposed on the top surface of the base cylinder, for connecting the input power cable or soft cable, the other end of the fork type contact shrapnel is composed of two elastic arms interconnected by the matrix, arranged in the dc plug insertion direction of the insulation base jack, the supply of computer monitor, so that it can work normally.