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http://en.wikipedia.org/wiki/Valve_audio_amplifier_-_technical
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http://www.amasci.com/emotor/vdg.html
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http://users.rcn.com/carlott/projects.html
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http://www.avrfreaks.net/index.php?na...phpBB2&file=viewtopic&t=48442
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http://wiki.virtualcogs.com/tiki-view_blog.php?blogId=1
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http://sound.westhost.com/project55.htm
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http://www.cmap.polytechnique.fr/~sylvain/domotique/enc28j60.html
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http://members.chello.nl/~m.heijligers/DAChtml/dactop.htm
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http://www.myhome.ch/mzingg/pcbstuff/tps