Lot of free Electronic circuit
http://www.redcircuits.com/Hobby.htm
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http://chronotronix.com/sites/nixie/nixie-tubes.htm
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http://www.embedtronics.com/nokia/fbus.html
Firewall + VPN for wifi
http://software.newsforge.com/softwar.../11/21/175249.shtml?tid=92&tid=78
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http://www.madhacker.org/rs232.htm
simple dim for nixie
http://www.mcamafia.de/nixie/ncp_en/nix_dim.htm
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http://linuxfr.org/~nominoe/20245.html
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http://www3.sympatico.ca/surfin.dude/creative/clocks/propclk/blick.html
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http://www.embedtronics.com/GPS/lassenSQ.html
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http://www.raphnet.net/electronique/psx_cardmgr/psx_cardmgr_en.php