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SparkFun will be closed May 25, 2015 for Memorial Day. Orders placed after 2pm on Friday the 22nd will ship out on Tuesday. Thanks!

Member #84566

Member Since: October 1, 2009

Country: United States

  • The underdash connector, which is also known as the Assembly Line Data Link (ALDL) has a nominal 12 volt (battery) terminal which is hot at all times, even if the engine is off and (in most vehicles) the cigarette lighter outlet is powered off. And the OBD-II-UART is powered from the vehicle. Can’t the Arduino likewise be powered from that 12 volt source (through a regulated DC to DC converter)?

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