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Member #261005

Member Since: October 23, 2011

Country: United States

  • I've seen it stated a bunch of places that using the wire library for Arduino enables internal pull-ups to 5V, and that you therefore shouldn't use it with 3.3V components. See, e.g.: http://playground.arduino.cc/Main/I2CBi-directionalLevelShifter and http://macdonaldm.blogspot.com/

    But if I'm using a 3.3V arduino pro mini, I would imagine that the internal pull ups would connect to 3.3V, and this should be a problem. I can't find specifics about this anywhere though. Is this correct?

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