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http://www.tubecad.com/2006/08/blog0075.htm
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http://audiyofan.org/forum/viewtopic.php?f=4&t=7378
Open source firmware for xbee compliant
http://www.sensemote.com/index.html
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http://shop.ciseco.co.uk/xrf-wireless...ata-module-xbee-shape-arduino-pic-etc
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http://www.cheap-thermocam.tk
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http://arduino.cc/forum/index.php?topic=53821.0
(power down mode)
http://interface.khm.de/index.php/lab/experiments/sleep_watchdog_battery
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https://github.com/cjbaar/LPD8806