Recent content by Martaine2005

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  1. Martaine2005

    blown charger for a workzone charger 220-250v 45w12.8v

    I can see a couple of problems with that. How are your multimeter skills?
  2. Martaine2005

    blown charger for a workzone charger 220-250v 45w12.8v

    I think you’ll have to open it and post some clear photos of the board. Sounds like there is a short circuit and possibly a fuse on the board too. My initial thought would be the bridge rectifier.
  3. Martaine2005

    Need Help Identifying an Unknown IC / Datasheet

    As above, what is it from?. 922 is an STmicro dual opamp although the logo on the IC doesn’t seem like it. Do a photo search of the IC logo to at least find the manufacturer if possible.
  4. Martaine2005

    Thought for the day...

    “Are we there yet”:)
  5. Martaine2005

    Induction motor induced current, series capacitor compensation

    There won’t be anything at standstill. Or do you mean stall current?
  6. Martaine2005

    Comedy Thread

    My son’s:)
  7. Martaine2005

    Comedy Thread

    That’s the ‘real’ multi tool:)
  8. Martaine2005

    Need help

    This sounds like homework. Have you asked Google these questions?
  9. Martaine2005

    High Current Issue with Complementary 300W Amplifier

    Measure the voltage drop across the emitter resistors. Should be very low, for example 10mV.
  10. Martaine2005

    How Do You Confirm a Suspected Short on a PCB?

    I would briefly check the voltage regulators, diodes, capacitors and output transistors for a short. Then I would remove the suspect component and check it again out of circuit. Also check the PCB to see if the short has gone. Sometimes a higher current will blow the short open circuit. A...
  11. Martaine2005

    5013 - Component identification

    Erm, :)
  12. Martaine2005

    speed controller

    27.145 MHz is channel 4 or YELLOW for RC cars, boats etc. It’s now old technology. But to answer your question, it’s definitely possible and reasonably cheap to do so. You will have to disassemble the train. This will most likely involve replacing all the electronics in the train for a digital...
  13. Martaine2005

    Recommended ways to program Uno board

    You don’t generate its code, you write it. C or C++. But there are 10s of thousands already written on sites like Arduino or github. YouTube is a great source for Arduino programming. Even chatgpt will attempt writing your code. Obviously, someone else’s code will need to be changed to exactly...
  14. Martaine2005

    Will an over‑discharged "dead" battery be woken up by NFC wireless charging?

    I think the battery chemistry would be damaged if depleted below a certain threshold. Reviving a fully depleted/discharged cell may work for a limited time but the damage is done.
  15. Martaine2005

    DVD Optical Pickup Assembly

    1. Have you tried cleaning the lens?. 2. It’s a risk that might pay off.
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