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http://www.pcb123.com/pcb123tutorial.php
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http://www.embedtronics.com/usb/usb232.html
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http://serdisplib.sourceforge.net/index.html
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http://private.addcom.de/KeithWilson/Projects/mucop.htm
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http://www.jr-international.fr/modules.php?name=Boutique&itm_ref=15398
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http://www.hardwaresecrets.com/article.php?id=86
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http://www.airborn.com.au/layout/232cnv.html
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http://www.tavernier-c.com/platineexpstamp.htm
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http://bstamp.sourceforge.net
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http://www.sparkfun.com/shop/index.php?shop=1&cat=52