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http://www.turbokeu.com/myprojects/vfdclock/iw-18%20pinout.gif
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http://www.scienceprog.com/drive-dot-...-display-using-lpt-port-and-driver-ic
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http://www.von-info.ch/hb9afo/max2750_tx.htm
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http://www.piclist.com/techref/io/stepper/linistep/index.htm
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http://img72.imageshack.us/img72/3512/in13drv18oa.gif
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http://www.serasidis.gr/circuits/smscontroller/smscontroller.htm
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http://www.pmillett.com/technical_books_online.htm
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http://users.rcn.com/ted.johnson/ssbar.htm