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  • KG5NII's Avatar
    08-25-2019, 10:12 PM
    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 VCC pin. ...
    13 replies | 410 view(s)
  • KG5NII's Avatar
    08-22-2019, 08:45 PM
    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 will be doing some...
    13 replies | 410 view(s)
  • KG5NII's Avatar
    08-22-2019, 06:35 PM
    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 check. It's been quite a...
    13 replies | 410 view(s)
  • KG5NII's Avatar
    08-22-2019, 06:24 PM
    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 mine failed. What is...
    13 replies | 410 view(s)
  • KG5NII's Avatar
    08-22-2019, 06:06 PM
    firehopper, nope. Was being powered by the USB. But do agree with what you said otherwise. Cheers, Ron KG5NII
    13 replies | 410 view(s)
  • KG5NII's Avatar
    08-22-2019, 03:49 PM
    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 the 14 ohm short on...
    13 replies | 410 view(s)
  • KG5NII's Avatar
    08-21-2019, 08:39 PM
    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 checked on it about 18...
    13 replies | 410 view(s)
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About KG5NII

Basic Information

About KG5NII
Biography:
Amateur radio op. Aim at running 100% homebrew station.
Location:
Texas
Occupation:
Professional amateur

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Teensy 4 dead 08-25-2019 10:12 PM
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10-01-2019 06:16 AM
Join Date
08-17-2019