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Thread: PixelRadio, a DiY FM Transmitter with RDS RadioText

  1. #281
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    Quote Originally Posted by MikeKrebs View Post
    I have not built one but that message is tied to the RF VDC being "bad".

    (2) ESP32's VDC ADC. We use ADC1_CHANNEL_0, which is GPIO 36.

    This part of schematic:
    Attachment 45947

    Usual things. Check your solder is good. Check values of resistors. Check voltage before the resistors.

    You built two right? Are both of them saying that?
    Yes, I built 2. I have already checked my soldering and they both look good. I will check to see if I used a incorrect part during assembly of both.
    2012 - 1st year 64 Channels - 7500 LED lights - 5 sequences
    2013 - 128 Channels - 10,000 LED lights - 7 sequences (2 New)
    2014 - 201 Channels - upgrading 8 Arches to dumb RGB - 8+ sequences (1+ New)
    2015 - 240 Channels + 8 Universes - sequences TBD
    2016 - No Display
    2017 - Back in the Game - 240 Renard Channels + 12 Universes
    2018 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2019 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2020 - Emergency Conversion to Falcon F48 with limited wireless
    2021 - 10 RHL Simple Pi Pixel Controllers - 1 Master with 9 Remotes

  2. #282
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    When I open the UI on both of my builds I am getting BAD-VDC showing up under "Radio Status". What do I need to check?
    I suspect you have not installed the jumper that is required at J9.

    Please see the Jumper Wires section:
    https://github.com/thomastech/PixelR...e#jumper-wires

    If the J9 jumper was installed then please report the two voltages displayed on the Diag tab.

    EDIT: I reviewed the assembled PCB photos you posted last May. I can see that you have a 2-Pin header installed at J9, which is great. But you need to install the shorting block too.


    - Thomas
    Last edited by ThomasLED; 08-05-2022 at 01:25 PM. Reason: Photo Review

  3. #283
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    Quote Originally Posted by ThomasLED View Post
    I suspect you have not installed the jumper that is required at J9.

    Please see the Jumper Wires section:
    https://github.com/thomastech/PixelR...e#jumper-wires

    If the J9 jumper was installed then please report the two voltages displayed on the Diag tab.

    EDIT: I reviewed the assembled PCB photos you posted last May. I can see that you have a 2-Pin header installed at J9, which is great. But you need to install the shorting block too.


    - Thomas
    Installing the jumper on J9 fixed my issue on PixelRadio.26 I will continue on testing with this unit.

    However, when I install the jumper on J9 on PixelRadio.25, the green light on the ESP32 goes out and I lose my wireless connection. When I remove the jumper the green light comes back and I can reconnect to the UI. I have completed another visual inspection of the .25 board and don't see anything suspect. I have yet to put a multimeter on the resistors to double check, but comparing the stripes on each between the two boards has not surfaced any discrepancies. Where do I go next?
    2012 - 1st year 64 Channels - 7500 LED lights - 5 sequences
    2013 - 128 Channels - 10,000 LED lights - 7 sequences (2 New)
    2014 - 201 Channels - upgrading 8 Arches to dumb RGB - 8+ sequences (1+ New)
    2015 - 240 Channels + 8 Universes - sequences TBD
    2016 - No Display
    2017 - Back in the Game - 240 Renard Channels + 12 Universes
    2018 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2019 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2020 - Emergency Conversion to Falcon F48 with limited wireless
    2021 - 10 RHL Simple Pi Pixel Controllers - 1 Master with 9 Remotes

  4. #284
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    Installing the jumper on J9 fixed my issue on PixelRadio.26
    Good to hear.

    ... on PixelRadio.25, the green light on the ESP32 goes out and I lose my wireless connection. When I remove the jumper the green light comes back and I can reconnect to the UI. I have completed another visual inspection of the .25 board and don't see anything suspect.
    That suggests that the main power supply is shutting down when the jumper is installed.

    My first thought is that there is a short in the 9V power supply circuit (on the output side of J9) or the 12VDC wall wart is bad. So that's where I suggest you look.

    The initial troubleshooting tool should be your eyes. Inspect every soldered connection in the RF Amp area and verify none have solder shorts to the ground plane or nearby pads.

    If that does not solve the problem then perform general power supply troubleshooting. I'd start by measuring the voltage on C16. Should be > +11.5VDC with J9 removed and should not change much when the jumper is installed.

    Next check the voltage on C17. Should be approx +5.0VDC with J9 removed and should not change when the jumper is installed.

    If the previous voltages are OK then check the voltage on C20. Should be approx +9.0VDC with J9 removed and should not change when the jumper is installed.

    BTW, you have a working unit. So you can take ohm or volts measurements from it and use the info to locate the problem on the bad board.

    - Thomas
    Last edited by ThomasLED; 08-05-2022 at 05:46 PM.

  5. #285
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    Quote Originally Posted by ThomasLED View Post

    That suggests that the main power supply is shutting down when the jumper is installed.

    My first thought is that there is a short in the 9V power supply circuit (on the output side of J9) or the 12VDC wall wart is bad. So that's where I suggest you look.

    The initial troubleshooting tool should be your eyes. Inspect every soldered connection in the RF Amp area and verify none have solder shorts to the ground plane or nearby pads.

    - Thomas
    Found my problem! I now have 2 working PixelRadios! Thanks for your help!
    2012 - 1st year 64 Channels - 7500 LED lights - 5 sequences
    2013 - 128 Channels - 10,000 LED lights - 7 sequences (2 New)
    2014 - 201 Channels - upgrading 8 Arches to dumb RGB - 8+ sequences (1+ New)
    2015 - 240 Channels + 8 Universes - sequences TBD
    2016 - No Display
    2017 - Back in the Game - 240 Renard Channels + 12 Universes
    2018 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2019 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2020 - Emergency Conversion to Falcon F48 with limited wireless
    2021 - 10 RHL Simple Pi Pixel Controllers - 1 Master with 9 Remotes

  6. #286
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    You are welcome. Glad to hear that both PixelRadios are working.

    - Thomas

  7. #287
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    For future reference, what did you find?
    Live, Laugh, Love.

  8. #288
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    Quote Originally Posted by algerdes View Post
    For future reference, what did you find?
    It was either a solder bridge or a poorly soldered connection. I reflowed a couple of different joints.
    2012 - 1st year 64 Channels - 7500 LED lights - 5 sequences
    2013 - 128 Channels - 10,000 LED lights - 7 sequences (2 New)
    2014 - 201 Channels - upgrading 8 Arches to dumb RGB - 8+ sequences (1+ New)
    2015 - 240 Channels + 8 Universes - sequences TBD
    2016 - No Display
    2017 - Back in the Game - 240 Renard Channels + 12 Universes
    2018 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2019 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2020 - Emergency Conversion to Falcon F48 with limited wireless
    2021 - 10 RHL Simple Pi Pixel Controllers - 1 Master with 9 Remotes

  9. #289
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    Default Re: PixelRadio, a DiY FM Transmitter with RDS RadioText

    Thanks
    Live, Laugh, Love.

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