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http://www.kpsec.freeuk.com/components/ic.htm
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http://www.gedasymbols.org
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http://www.atmicroprog.com/realisations/rfid/rfid.php
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http://www.jamesnsears.com/projects/orb
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http://www.cs.umbc.edu/~squire/cs455_l18.html
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http://silakoff.blogspot.com/2006/12/hand-made-radioactive-monitor.html
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http://www.scienceprog.com/ease-h-bridge-on-mosfet-irf7105-transistors
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http://www.scienceprog.com/alternatives-of-max232-in-low-budget-projects
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http://members.chello.nl/r.dekker49/flyback/flyback.html
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http://www.instructables.com/id/EZ5VV035AXEV2Z4NZY/?ALLSTEPS