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  1. kellys_eye

    Please Help - Massage chair mainboard failure?

    Indicative of potentially faulty (or already-failed) capacitor at the LM2576 output.... it would cause 'wonkey' voltages and potentially stop the board doing its thing.
  2. kellys_eye

    Sharing A Speaker With An DY-SV19T For MP3 Files And ESP32 For Tone

    I din't know what form your signal from the ESP is - mark-space ratio, frequency etc so the capacitor value may need to change - try 10uF and a series resistor (100k). Does the ESP output still work? You should not ground either side of the speaker signal else you will damage the audio chip.
  3. kellys_eye

    Help Please with a monitor PSU.

    Wider view! Where do the tracks from the EN and BR pins go? What about a pic of the whole board too?
  4. kellys_eye

    Please Help - Massage chair mainboard failure?

    Need better, closer images of the board.....
  5. kellys_eye

    Help Please with a monitor PSU.

    Pictures? The EN would likely be an enable signal.
  6. kellys_eye

    Learning Electronics for Everyday Practical Reasons Non-Professional

    It's a very useful tool but probably at the 'next level' if you're talking simple DIY repairs. If you research the concepts behind an oscilloscope you'll understand where and how they can be useful. It's just another measuring tool. A 'visible' multimeter if you will....
  7. kellys_eye

    Sharing A Speaker With An DY-SV19T For MP3 Files And ESP32 For Tone

    You can apply a second audio signal to the chip but add a DC blocking capacitor to the output of your ESP32 (pin 32). A 100nF capacitor will do.
  8. kellys_eye

    Sharing A Speaker With An DY-SV19T For MP3 Files And ESP32 For Tone

    What are the code numbers on the tops of the two 8-pin devices?
  9. kellys_eye

    Sharing A Speaker With An DY-SV19T For MP3 Files And ESP32 For Tone

    Nope, you can't do that! The class-d amplifier has a 'balanced' output i.e. neither side is referenced to ground and your resistor is effectively shorting one side of the drive circuitry. You will damage it! Equally you will be applying a voltage to the output port of the ESP32 (the driven...
  10. kellys_eye

    Learning Electronics for Everyday Practical Reasons Non-Professional

    All the way from 'none' to 'degree level'. It's not for anyone but the applicant to decide. You can follow YouTube repair videos with ZERO skills and fix stuff or have degree-level education and still fix stuff. You won't know until you start doing it. If you have a test meter and know how...
  11. kellys_eye

    Sharing A Speaker With An DY-SV19T For MP3 Files And ESP32 For Tone

    Schematic? There's a class-d audio amplifier chip on that board (assuming I'm looking at the right thing). If you can identify the chip type you should be able to access the input (audio) pin and apply the signal from your ESP32 at that point (using a suitable series resistor) and the audio...
  12. kellys_eye

    4s lithium ion 16850 batterypack bms, charger, discharge.

    Note to OP - using paragraphs make it a LOT easier to read. Batteries connected in series have a current limitation equal to that of a SINGLE cell. Batteries connected in parallel have a current limitation equal to that of the SUM of the individual cells. The equipment under power determines...
  13. kellys_eye

    After some advice please

    No, it won't. It's knackered Jim. She canna' take any more Captain... That parrot is deceased. Being an eBay purchase you might get lucky to receive a refund if you paid using Paypal or the Ebay payment scheme - start a claim by registering the fact that the 'goods are damaged'. If you...
  14. kellys_eye

    Learning Electronics for Everyday Practical Reasons Non-Professional

    How long is a piece of string? Until you start measuring it you'll never know. There is no way we (or you) can determine what skill levels are required until you start learning them. Once you start applying them you might find that what you already know is enough (or not) and proceed...
  15. kellys_eye

    Learning Electronics for Everyday Practical Reasons Non-Professional

    Over years I have taken the opportunity to teach myself many, many differing practical skills and to gather tools that fit with the levels of skill that I now possess. I did this for more than one reason - firstly a thirst for knowledge. It's insatiable! I have only once used the service of...
  16. kellys_eye

    Learning Electronics for Everyday Practical Reasons Non-Professional

    I suppose there are parallels to motor maintenance and electronics repair in the sense that replacing a spark plug is akin to changing a blown fuse. When you do auto-maintenance you acquire the tools necessary to do the job and your toolkit expands as the complexity of the work - the same...
  17. kellys_eye

    Validator breakout

    Should have got it for free........
  18. kellys_eye

    Modified wiring, your thoughts?

    That meter is set to measure up to 100A therefore it's accuracy (say 1%) would be +/- 1A (fsd). If the meter itself only draws 100mA (and it's probably a lot less) than this additional load is under the accuracy range (one TENTH of the permissible error reading) and therefore can be ignored as...
  19. kellys_eye

    CAN communication using i.MXRT 1064EVK

    I'm usually at a loss to understand the predilection for wanting to achieve something that is commonplace using something that is 'obscure' - it's as if some people deliberately want to complicate their lives and cause themselves frustration akin to wanting to re-invent the wheel. CAN bus...
  20. kellys_eye

    Modified wiring, your thoughts?

    The difference is entirely the total current drawn by the metering device - that's it. If the meter is actually reading more than 10A in normal operation then the 'difference' is going to be less than the meters actual accuracy - in other words, negligible.
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