7805_7905 3.3V ±5V ±12V 直流稳压电源ALTIUM设计原理图PCB+AD集成封装库, 硬件2层板设计，ALTIUM设计的工程文件，包括完整的原理图和PCB文件，可以做为你的设计参考。 集成库型号列表： Library Component Count : 18 Name Description ---------------------------------------------------------------------------------------------------- 78L05 3-Terminal Positive Voltage Regulator 78L12 3-Terminal Positive Voltage Regulator 7905 Bridge1 Full Wave Diode Bridge CON4 Connector Cap Capacitor Cap Pol1 Polarized Capacitor (Radial) Diode 1N4007 1 Amp General Purpose Rectifier FUSE Fuse 1 Fuse HEADER 2 Header 3 Header, 3-Pin LM317LBZ Low Current 3-Terminal Adjustable Positive Voltage Regulator LM7912CT 3-Terminal Negative Regulator Res2 Resistor TRANSCT Center-Tapped Transformer USB 发光二极管