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http://www.georgegardner.info/electronics/class-d-avr.html
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http://www.waitingforfriday.com/index...tion_Library_for_AVR_microcontrollers
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http://modzer0.cs.uaf.edu/~dan/powermeter
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http://arduino.cc/forum/index.php?topic=53821.0
Use timer1 on Atmega
http://www.electronicsblog.net/exampl...-bit-hardware-timer-for-digital-clock
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http://diy.elektroda.eu/programator-usbtiny-mkii-slim/?lang=en
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http://scanlime.org/2008/09/using-an-avr-as-an-rfid-tag
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http://www.scienceprog.com/using-freertos-kernel-in-avr-projects
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http://generichid.sourceforge.net/hardware.htm
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http://blog.strobotics.com.au/2009/06/09/reading-widget-battery-voltage