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    Thanx SO much! I have zero experience with...

    Thanx SO much! I have zero experience with touchscreens so this will be an adventure. Glad to know it won't be hampered with interference from the SD applications. Must see where there is...
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    I take it that since I have a Teensy 4.1 with a...

    I take it that since I have a Teensy 4.1 with a built in SD (Thanx so much Paul for helping me get the SD up and running) I should have no concerns about SD cards and the display working, as long as...
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    Michael, The pololu seems to be the totally...

    Michael,

    The pololu seems to be the totally simplest and most cost effective option. Many thanks for the suggestion. Pololu seems to be a good place.
    I ordered additional things from as well...
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    Teensy 4.1 with Sunfounder LCD

    I have a Teensy 4.1 that I wish to use it with a Sunfounder I2C LCD2004 4 x 20 LCD display. It is the one with 4 wire input which requires only
    2 I/O lines. I see clearly how to hook it up, have...
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    MANY THANX, PAUL! One line of written code is...

    MANY THANX, PAUL! One line of written code is worth 1000 verbal descriptions! You can see from my code above that I misinterpreted the verbal info!
    I can get SD to open now, and now I'll mess with...
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    Adding to the list of things that DONT work, I...

    Adding to the list of things that DONT work, I talked to Paul and he said you have to put in a statement "chipSelect=BUILTIN_SDCARD
    in code for the 4.1, after which the usual SD libraries from...
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    Teensy 4.1 Cannot access Internal SD card

    I am an experienced Arduino user making the switch to Teensy and finding it painful. I recently got the full featured 4.1 with built in SD card, but can find no way to access it.

    Arduino's SD...
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