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  1. Martaine2005

    Sennheiser HD429 Earphones. Cable broken.

    Yes they are but the suction can rip them off. Therefore breaking the trace. The trace can also ‘lift’ requiring either gluing back down or cutting and inserting a ‘jumper’ wire. Also, the pads are probably the weakest link as no solder mask is covering it. (Green coating on above board). Martin
  2. Martaine2005

    Fishing bite alarm

    You let us know! Did it work? Well done, you learn something every day. Why not? Martin
  3. Martaine2005

    Sennheiser HD429 Earphones. Cable broken.

    A solder pad is where the electronic component gets soldered to. It’s the copper ring in through hole boards and little circles or squares on surface mount boards. Here’s a pic of a through hole board with copper rings. That’s what you are sucking/vacuuming off the board when desoldering. Martin
  4. Martaine2005

    HOW TO Convert 12v to 13v

    The power supply shown is most definitely a SMPS. Martin
  5. Martaine2005

    KL MMA160 inverter igbt arc welding machine does not weld although it gives an appropriate value of

    As I don’t know much about inverters, others here do, I would wait for assistance from them. But generally a bad connection could cause the voltage to drop under load. If the diodes exploded, it must have drawn a lot of current. Possibly a PCB track has melted or gone open circuit. But wait for...
  6. Martaine2005

    KL MMA160 inverter igbt arc welding machine does not weld although it gives an appropriate value of

    Sounds like the voltage is present but not enough current available. What happens to the voltage when you get an arc/spark (under load). Does it fall drastically? Martin
  7. Martaine2005

    Have 3,3V need 15V

    Yeah, that’s a difficult question to answer unless you understand physics. Which I don’t. I suggest you read up on ‘depletion region’ and ‘P-N junctions’. It’ll give you a better understanding. In any case, you don’t need ‘the’ diode. LEDs are diodes (light emitting diodes), so won’t work if...
  8. Martaine2005

    And now something weird

    It’s short for a sister forum. All About Circuits. Found here. Martin
  9. Martaine2005

    HOW TO Convert 12v to 13v

    That’s a SMPS. I doubt you can alter it . Get another adapter with a higher voltage. Or a linear transformer. Or of course a boost converter. Martin
  10. Martaine2005

    HOW TO Convert 12v to 13v

    Not without opening it. Is it like a laptop power supply or a phone charger/PSU? Or a heavy little walwart? Martin
  11. Martaine2005

    Have 3,3V need 15V

    I don’t know anything about Arduino yet although I have a few but never tried them. Many users on here do use them and they can answer your questions. However, I do believe you can use 0’. Martin
  12. Martaine2005

    HOW TO Convert 12v to 13v

    What type? SMPS? Linear? Is it a higher voltage and regulated to 12V internally?. Current output? Martin
  13. Martaine2005

    Why do some devices turn on with the mains before the "On" button is pressed?

    Yes totally. I used ‘unplug’ to mean turn off, disconnect, switch off etc in whatever manner. Because each unit might be in a different room. Martin
  14. Martaine2005

    Sennheiser HD429 Earphones. Cable broken.

    No, no. I meant the solder vacuum pump easily pulls off solder pads on the PCB. Martin
  15. Martaine2005

    Have 3,3V need 15V

  16. Martaine2005

    Have 3,3V need 15V

    You won’t need the diode. Just the resistors. Martin
  17. Martaine2005

    Why do some devices turn on with the mains before the "On" button is pressed?

    Especially if you’re away on holiday! But any smart person would unplug those types. Martin
  18. Martaine2005

    Sennheiser HD429 Earphones. Cable broken.

    Yes, they sure are good. Be mindful when using it though as They can pull pads off quite easily. Don’t ask me how I know!. Martin
  19. Martaine2005

    absolute noob trying to start

    Yes, I realised what you meant but I couldn’t resist it:) I have the old telephone exchange building in my road. It’s still full of the old equipment. Incidentally, my uncle was the area manager for BT (British Telecom) and was given his golden handshake retirement from that very building. Martin
  20. Martaine2005

    Have 3,3V need 15V

    That would be the easiest and cheapest way to do it. No point in buck/boost circuits, relays, more wiring etc. The LEDs will prefer DC and won’t tend to flicker due to half rectified unsmoothed DC. And be perfectly happy being controlled by the Arduino. Martin
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