绘制原理图及pcb图的好工具，解决了很多元器件没有的问题，而且是绿色版-Drawing schematic diagram and pcb diagram a good tool to solve a lot of components do not have problems, but also the green version

电路图画板，可以很轻松的实现电路图，vc6源码 ，自己修改下，可以成为自己的专版，好东西。适合pcb开发的朋友们-Schematic drawing board, can easily achieve circuit, vc6 source, make changes to it, it can become its own feature page, good stuff. Development of friends for pcb

奇声 AV-757DB双通道的4558前级,原理图+PCB-Odd sound AV-757DB dual-channel 4558 preamp schematic+PCB