ExpressPCB 是一门科学CAD应用工具软件也是一款免费的 PCB 设计软件，简单实用。可以画双层板，目前美国若干知名半导体公司提供的参考设计基本都是采用 ExpressPCB 来设计的。ExpressPCB 工具软件简单实用，新手上手速度快，电路板设计质量都能满足要求。
PCB Layout Software> Our ExpressPCB circuit board layout program is a snap to learn and use. Laying out PCBs is easy, even for the first time user. Here are the steps:
Select the Components
> Begin your layout by adding the components. Select the parts from the Component Manager dialog box. Many components (such as connectors) include Digi-key part numbers to make ordering easy.
Position the Components
> Drag each component to the desired location on your board. The Snap to grid feature makes it easy to neatly align the parts.
Add the Traces
> Now add each trace by clicking on the pin of a component and dragging the trace to another pin.
If you link your schematic file to the PCB, then the ExpressPCB program highlights the pins that should be wired together in blue.
See Tips for making PC boards for more help on board layout.
Edit the Layout> Making changes is simple using standard commands such as Copy, Cut and Paste. Rearrange the parts by dragging them with the mouse. Traces always stay connected to their pins, even when you move things around.
You can set the properties of items in your layout by double-clicking on them. For example, double-click on a trace to change its layer or width.
Order the PC Boards
> After you complete your layout, the ExpressPCB program tells you exactly how much it costs to have the boards made. Then order them online using the Order boards via the Internet command.
Schematic Design Software
> The ExpressSCH schematic design program is just as easy to use as our PCB layout software, both having the same user interface. After spending a few minutes to learn one, mastering the other takes no time at all. Here’s how simple it is to draw a schematic with ExpressSCH:
Select the Components
> Begin your schematic by placing the components. Select the parts from the Component Manager dialog box. ExpressSCH includes a large library with hundreds of component symbols (ICs, resistors, capacitors…) that you can use to draw your electronic circuits.
Position the Components
> Drag each component to the desired location on the page. The Snap to grid feature makes it easy to neatly align the symbols.
If all of the components do not fit on a single page, add additional sheets. All the sheets of a schematic are linked together and saved in one file.
Add the Wires
> Now draw the wires to connect the parts together. Add each wire by clicking on a component’s pin, then dragging the wire to the pin it connects to.
Edit the Schematic> Making changes to a schematic is simple using standard commands such as Copy, Cut and Paste. Rearranging the components is easy by dragging them with the mouse. Wires always stay connected to their pins, even when you move things around.
Link the Schematic and PCB
> After you complete your schematic, it can be linked to your circuit board layout file.
This image of the ExpressPCB layout program shows how it guides you in designing your board by highlighting in blue the pins that should be wired together.
汉化说明：安装界面为英文，安装后即是中文版。
下载 ：ExpressPCB 7.0.2 汉化中文版 PCB 电路板设计软
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