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  1. Replies
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    Kurt, My application utilizes a numeric keypad...

    Kurt,
    My application utilizes a numeric keypad along with a decimal point, a DEL and a SET button which all use the Adafruit_GFX_Button helper class. All of this is on a touchscreen of course. The...
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    Kurt, First: I appreciate you and your...

    Kurt,

    First: I appreciate you and your efforts, especially in the ILI9341 arena. Thank you.
    Second: Thank you for your reply.
    Third: Having tried out the _t3n code, I've concluded...
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    Thank you for your reply. Yeah. That is what I...

    Thank you for your reply.
    Yeah. That is what I thought. However, that doesn't seem to work. I was already doing that:



    // DEL key pressed. Remove last char from txtBuf and print txtBuf to...
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    ILI9341_T3 question

    I have an old precision voltage reference project that used an Arduino Nano + ILI9341 touch screen. Yeah its slooooow , and now I am porting this project over to the Teensy 3.2. No really big issues,...
  5. Thread: Teensy 4 dead

    by KG5NII
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    Results of display measurement and possible conclusions

    Just wanted to let you and the others who contributed to this thread know that after checking the display, It is definitely a 3.3v display. It has an onboard 3.3V LDO whose input is taken from the...
  6. Thread: Teensy 4 dead

    by KG5NII
    Replies
    13
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    705

    Yep, that is on my to-do list. But as I have...

    Yep, that is on my to-do list. But as I have indicated elsewhere, one would think if that were the case, the Teensy would have been toasted almost immediately. Still for the sake of completeness I...
  7. Thread: Teensy 4 dead

    by KG5NII
    Replies
    13
    Views
    705

    JBeale, that is an interesting possibility. ...

    JBeale, that is an interesting possibility. Purchased this display from pjrc. That having been said though, I seem to remember there being a 3.3v reg on the display but will need to double to...
  8. Thread: Teensy 4 dead

    by KG5NII
    Replies
    13
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    705

    defragster, am positive about no solder shorts. ...

    defragster, am positive about no solder shorts. Have examined it closely under my microscope. Yes, I get your point about it's robustness ETC. That's the whole point of me trying to identify why...
  9. Thread: Teensy 4 dead

    by KG5NII
    Replies
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    705

    firehopper, nope. Was being powered by the USB. ...

    firehopper, nope. Was being powered by the USB. But do agree with what you said otherwise.

    Cheers,
    Ron KG5NII
  10. Thread: Teensy 4 dead

    by KG5NII
    Replies
    13
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    705

    Oh there is a short on the entire 3.3V rail....

    Oh there is a short on the entire 3.3V rail. Resettable fuse too hot to touch resulting in only 2.5V to the 2305 mosfet which in turn feeds that 2.5V to the 3.3V LDO. LDO is in current limit due to...
  11. Thread: Teensy 4 dead

    by KG5NII
    Replies
    13
    Views
    705

    Teensy 4 dead

    Is there a schematic, component layout ETC for the Teensy 4? I've a problem with mine. Was running one of the ILI9341_T3 graphics example sketches overnight which was working fine, but when I...
  12. Kurt, Thank you for your reply. Don't...

    Kurt,
    Thank you for your reply. Don't bother. Its now working. Turns out that pin 13 (SCLK) had a tad too much flux on it which was causing a high resistance connection. Not your typical...
  13. Code commentary in the file attachment referring...

    Code commentary in the file attachment referring TFT_RST is wrong. Instead of the TFT's LED pin it should be the TFT's RESET pin.
    Mistakes are my thing. I'm good at them. Unbelievable the...
  14. Teensy 4 + 2.8" TFT using ILI9341_t3 issues.

    SETUP:

    Teensy 4 + 2.8 inch ILI9341 TFT display using ILI9341_T3
    Teensyduno-1.47-beta7
    Arduino 1.8.8 on Linux 4.19.27 (Funtoo Linux)

    I've a prototype Teensy TFT display shield PCB I...
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