常用pcb库文件，方便进行电路开发，protel99格式的,Pcb library file used to facilitate the development circuit, protel99 format

protel99 stm32单片机原理图库和PCB库-protel99 stm32 footprint

比较全的ALTERA芯片的原理图和封装库(Protel99)，对需要画Altera FPGA PCB版图的同志很有用。-Comparing all the ALTERA chip schematic and footprint library (Protel99), on the need to draw Altera FPGA PCB layout comrades useful.