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  1. Martaine2005

    Vintage Yamaha Psr 32 Music Keyboard Noise

    Coz it’s sly!
  2. Martaine2005

    Portable Electric Grill Shorting?

    I think after 12 years, several new grills have been bought!
  3. Martaine2005

    Speaker Amp Module Repair

    Agreed. I was awaiting a clear photo to have a better look. Martin
  4. Martaine2005

    Speaker Amp Module Repair

    The bridge rectifier on your first photo is top left. Black component with 4 legs. Looks like this:
  5. Martaine2005

    Speaker Amp Module Repair

    No easy task for someone with the questions you’ve asked. The yellow ‘things’ are X2 safety capacitors. With no power, you need to verify where the voltage goes and then stops!. I’d start with the mains cable. Then the mains input components. ie the on board fuse and the bridge rectifier. Your...
  6. Martaine2005

    1993 Magnavox FW 27 Mini HiFi Stereo System won't turn on

    I do believe 300KB works well. There are also plenty of online sites that re-size free. Martin
  7. Martaine2005

    Lowering 54vdc to 48-50vdc

    What does the voltage drop to when the amp turns on with your unregulated 54V? I would have thought about 50V or below. Martin
  8. Martaine2005

    Electronics Engeeniring

    I believe that there is no definitive answer as everyone learns at their own pace and style. Some like to study in groups while others prefer to study alone. Either way, study, study, study until your fingers bleed. In the real world, everybody asks for help from a colleague. Whether it’s a...
  9. Martaine2005

    Magnifying tool for tiny circuit boards and surface mount?

    For PC, there are ‘pen’ types of USB magnifiers. But not sure whether you’d have enough space under it to solder etc. I prefer the camera option which can be used with microscopes and then output the signal via HDMI to a monitor/TV. I think you would need to double your budget to get a cheap...
  10. Martaine2005

    SteelSeries X9 - converting to USB c port.

    USB-C can be connected either way, so only using two wires can potentially cause reverse polarity. Get the correct connector for your headphones. Martin
  11. Martaine2005

    help with IR2110 chips

    Exactly. It’s written as R=V/I. That’s why Ohms law is such a basic necessity. Martin
  12. Martaine2005

    help with IR2110 chips

    The ‘inline’ series resistor will have a voltage drop. It WILL lower the voltage depending on resistance. The ‘pretty colour wheel’ is your friend. The series resistor will then supply a constant current (providing supply voltage stays the same). So to calculate your resistor, you need to know...
  13. Martaine2005

    Plate amplifier issues

    Sounds like bad electrolytics judging by your description.
  14. Martaine2005

    SteelSeries X9 - converting to USB c port.

    https://www.memorysuppliers.com/blogs/memory-suppliers-blog/guide-to-the-differences-between-mini-usb-micro-usb-and-usb-c
  15. Martaine2005

    SteelSeries X9 - converting to USB c port.

    Without getting too involved straight away, micro USB is different to USB C. You can’t just swap Willy nilly!. Martin
  16. Martaine2005

    Remote spray paint tool help

    Haven’t you got bored teenagers in your area?. They’ll save you a fortune on buying spray. Offer them a fiver (£5) to do your spraying for you?. Obviously dependant on having a local store for them to nick from:)
  17. Martaine2005

    Remote spray paint tool help

    I didn’t think about that! But upon further reflection, they can’t spin fast or the spray will just mist everywhere.
  18. Martaine2005

    Remote spray paint tool help

    I think for the rotating section to have power without twisting the wires, a slip ring would be required. The ‘motors’ for depressing the cans remotely would require a simple setup with two servos. This can be achieved by a cheap radio controlled plane/car radio setup. Martin
  19. Martaine2005

    Any one have datasheets for AR1335 CMOS sensor from Onsemi ?

    Go to Onsemi’s website and request it. The option is there. Martin
  20. Martaine2005

    I need help with a circuit

    Use Ohms law to calculate the total current. Or make the circuit and measure the total current. But you have to specify what brightness you require therefore altering the mA to each LED. You may find that 5mA is bright enough or 15mA etc. Have a good read HERE to get a good understanding. We...
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