Home > Arduino, Code > I2C Connection and Level Conversion

I2C Connection and Level Conversion

October 12, 2010 Leave a comment Go to comments

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  1. lightning808@hotmail.com
    April 12, 2011 at 21:32

    What chip is used for level conversion?

  2. Anonymous
    December 23, 2012 at 07:59

    I’m using the sparkfun level converter shown above but am getting a significant amount of static when I connect my hifiduino/arduino up to my Buffalo III. Anyone else having this problem? Am thinking about trying an i2c isolator like the Adum1250 ( http://m.analog.com/mt/www.analog.com/en/interface-isolation/digital-isolators/adum1250/products/product.html) in place of the level converter. Would appreciate any thoughts folks might have.

    • BlgGear
      January 19, 2013 at 17:58

      Adum is good idea, but not necessary if it works

  3. David Quayle
    January 19, 2013 at 11:17

    I watched a Arduino Tutorial by Jeremy Blum that said the I2C lines should have 10k pullup resistors, do you think this is necessary?

    • BlgGear
      January 19, 2013 at 17:57

      Arduino has built in pull ups or the level converters also have pull ups

  4. David Quayle
    January 20, 2013 at 08:17

    Thanks, I didn’t know the level converters had Pull Ups. I read an interesting article on I2C Pull Up resistors you may or may not be interested in, http://dsscircuits.com/articles/effects-of-varying-i2c-pull-up-resistors.html

    • BlgGear
      January 20, 2013 at 16:15

      That is an excellent site. You can add additional pull-ups without any negative effects

      • sdo
        April 15, 2014 at 00:37

        Gravitech offers i2c-TRN v2 with build in pull-up resistors. Worked on the first try with B-II and UNO v3. I later switched t Adum1250 based interface between the two.

  5. David Quayle
    April 17, 2014 at 10:51

    sdo :
    I later switched t Adum1250 based interface between the two.

    Yes that’s what I am using works fine

  6. September 14, 2016 at 17:47

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  1. December 22, 2010 at 07:07

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