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最近在使用Eagle PCB layout電路，除了學會自己要製作新的元件（Device, symbol, package），

也找了許多的網路資源的元件庫，

以下是連結的網址：

1. Ladyada/Adafruit's own Eagle CAD library: http://www.ladyada.net/library/pcb/eaglelibrary.html

２. 2mm pin header.lbr: https://github.com/cmonr/Eagle-Libraries/blob/master/headers%282mm%29.lbr

３. Eagle PCB FQA (DXF, 鋪銅設定(Orphans)): http://www.embest-tech.cn/eagle/faq.php

4. 鋪銅設定: http://arduino.tw/eagle/eagle--/217-eagle-layout-.html

5. 產生Gerber檔，包含.pls: http://www.build-electronic-circuits.com/gerber-file/

6. 雙面Gerber檔: http://wenku.baidu.com/view/d8c126dece2f0066f53322cc.html

其他使用上的經驗談:

1. 要將元件放在PCB bottom layer: 使用mirror功能，將元件 Mirror。

2. Gerber files:

• *.cmp (Copper, component side)
• *.drd (Drill file)
• *.dri (Drill Station Info File) – Usually not needed
• *.gpi (Photoplotter Info File) – Usually not needed
• *.plc (Silk screen, component side)
• *.pls (Silk screen, solder side)
• *.sol (Copper, solder side)
• *.stc (Solder stop mask, component side)
• *.sts (Solder stop mask, solder side)