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Thread: 2x20 display using a i2c shift register

  1. #1

    Default 2x20 display using a i2c shift register

    I want some of you input on using this chip as just the data lines on a 2x20 display.

    search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-13746-5-ND

    I am toying with the idea to make my parallel display somewhat serial by using the I2C method. Any thoughts?

    My display would still require me to use the RW, RS and E lines but using the I2C chip I could free up 6 I/O pins on the propeller.
    Last edited by ForumTools; 10-02-2010 at 04:43 AM. Reason: Forum Migration

  2. #2

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    This link uses a different chip: http://www.parallax.com/Portals/0/Downloads/docs/cols/nv/vol5/col/nv109.pdf

    The chip you referenced has drain only outputs. Will that work with the lcd?

    John Abshier
    Last edited by ForumTools; 10-02-2010 at 04:43 AM. Reason: Forum Migration

  3. #3

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    @ John Abshier

    I think that the outputs would have to be pulled high. Ill look over the link.
    Last edited by ForumTools; 10-02-2010 at 04:43 AM. Reason: Forum Migration

  4. #4

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    WOW ^^ That link is soooo what I am looking in to doing. Thanks you are a life saver.
    Last edited by ForumTools; 10-02-2010 at 04:43 AM. Reason: Forum Migration

  5. #5

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    You could go even simpler than this with just a plain old shift register.
    http://forums.parallax.com/showthread.php?p=788280

    If you can burn PIC chips I also have code for a serial LCD on an 8-pin PIC.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    *Peter*
    Last edited by ForumTools; 10-02-2010 at 04:43 AM. Reason: Forum Migration

  6. #6

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    I can burn PIC Chips could you shoot me over the code. I think it would help me learn a great deal.
    Last edited by ForumTools; 10-02-2010 at 04:43 AM. Reason: Forum Migration

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