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Type: Posts; User: FLL-Freak

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    I will show my age and mention that we kept an AM...

    I will show my age and mention that we kept an AM radio next to the PDP-8 as a debugging tool. One could hear an infinite loop and other distinctive audio patterns from the RF interference.

    Some...
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    Teensie 4.1 RF interference

    I am building an IMU for a robot using the Teensie 4.x as the main compute engine.
    During development I am using the 4.1 to be able to write all the raw sensor data to the SD card for algorithm...
  3. I got my T4,1 in today and the SD card works...

    I got my T4,1 in today and the SD card works perfectly with it. Did not work on the T4.0 reliably. My connections to the SD card breakout where a series of discreet wires each about 2 inches long....
  4. KurtE, Thank you for the test program. I am...

    KurtE,

    Thank you for the test program. I am sure it will come in handy. I do not think soldering is the issue. All the joints look perfect under a microscope. Not only that, but it works about 50%...
  5. Since @defragster showed me it was possible, I...

    Since @defragster showed me it was possible, I gave it another try tonight with the T4.0 and AdaFruit SD card on 1.5 inches of wire. Still no go. So I pulled out the logic analyzer and connected up 3...
  6. I have restored my sdFat-beta to factory...

    I have restored my sdFat-beta to factory defaults. My hardware in a T4.0 with an AdaFruit sdcard breakout board as above.
    The SD card is a SanDisk Ultra SDHC 16G card.
    I ran the SdInfo demo (no...
  7. Thank you for fixing the schematic. That will...

    Thank you for fixing the schematic. That will reduce some confusion in the future.
  8. But the knobs and dials are soooo shiny and...

    But the knobs and dials are soooo shiny and pretty... Must be there for a reason... Must turn and spin them... Must...

    Ok, I will try it out of the box and see what happens.
  9. I did not mean to imply an error with the library...

    I did not mean to imply an error with the library but rather my use of it. I am sure that it is working for a good number of people.
    (These people must be living a cleaner life than I am.)

    By the...
  10. Somehow I keep losing replies to threads....

    Somehow I keep losing replies to threads. Hopefully this is not a duplicate.

    I am glad to hear that the schematic issue is likely just a documentation issue and not in the copper.
    It does sadden...
  11. Schematic error in T4.0 or T4.1 on SD pins

    I have been having a hard time getting my T4.0 to talk to an SD card. A friend has a T4.1 that works fine.

    I went back to review what I had done when I noticed an inconsistency in the published...
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    Teensy 4.0 Basic SD card usage

    My goal is to use and SD card to log a large amount of data from an inertial measurement system.

    What I am trying to do should be simple, but it is now going on three weeks with no luck.

    I have...
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    Somehow the long and very articulate and amusing...

    Somehow the long and very articulate and amusing update I made got lost. So here is a second less illuminating try.

    I cut the wires back to two inches from an embarrassingly longer set. Now things...
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    Solder joints look all solid under a microscope....

    Solder joints look all solid under a microscope. Possibly a bad SD socket. Or possibly the wires too long between T4 and SD card.

    Any suggestions for max length?

    Thank you for you reply.
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    Teensy 4.0 and SD card issues.

    I connected an AdaFruit 3V3 only SD card breakout board to the Teensy4 using individual wires. I used the unpopulated pads on the back of the Teensy4 connecting like wire names between. The only...
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