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  1. kellys_eye

    USB charging

    The charger WILL have the voltage/current details on it somewhere - post a pic of it.
  2. kellys_eye

    Tail lights help

    Best check with your local regulations as to your lights. They usually have to meet with regulations pertaining to light levels and beam spread so you can't just put 'any old thing' in its place. If you're using LED tape (seems like) then you don't need resistors as the tape includes them -...
  3. kellys_eye

    APEX JR. subwoofer amp blowing fuses, bad caps found

    I can't read the schematic too clearly but I think we're looking at Q105 and Q106 as potential problems. Use your meter diode function to check between all three pins of each transistor and report the results.
  4. kellys_eye

    APEX JR. subwoofer amp blowing fuses, bad caps found

    Shouldn't be necessary in a non-SMPS situation although the small additional cost isn't worth arguing over.
  5. kellys_eye

    APEX JR. subwoofer amp blowing fuses, bad caps found

    That's what I said. Some plastic missing at the bottom in one pic - could be as a result of 'scratching' rather than melting though. Dunno at this stage. I'd point out to the OP that the usual cause is the final stage output transistor(s) - one probably gone short. Quick check with test...
  6. kellys_eye

    APEX JR. subwoofer amp blowing fuses, bad caps found

    I missed the missing plastic! Remove the capacitors and power it up again. It'll hum like hell but if the fuse doesn't blow then you've found the fault.
  7. kellys_eye

    APEX JR. subwoofer amp blowing fuses, bad caps found

    Could be..... but large electrolytic capacitors are often 'glued' to the circuit board to give more mechanical rigidity and that black goo could just be the 'glue' they used. Need a wider shot of the whole arrangement and/or the schematic to make a more specific decision. Those caps are also...
  8. kellys_eye

    'nuther thing....

    That's pretty much what I can get using the basic snapshot facility in Ubuntu.
  9. kellys_eye

    DC boost convertor

    No reason why not but these work out at around $1 each, ready made...
  10. kellys_eye

    Help Identifying this electronic component ?

    Well, we know it's polarised so it's either a capacitor or a diode. It's designation seems to be C31 (needs clarification) but a quick meter test will reveal if it's a diode and may even show enough to prove it as a capacitor. It certainly doesn't look faulty but looks can be deceiving. Have...
  11. kellys_eye

    DC boost convertor

    Whilst these are readily built on a DIY purpose they are so common and cheap via the usual Chinese/eBay suppliers that no-one ever actually builds their own these days.
  12. kellys_eye

    'nuther thing....

    Not sure if something lie the following exists but if it does can someone point me to it - and if it doesn't can someone develop it so they can make a fortune???? I'd like to have a mouse facility (right-click) that allowed me to choose what I wanted to do with whatever it was I click'n'dragged...
  13. kellys_eye

    What's 'fast enough'?

    I'm almost like <shouting out> "SELL ME SOMETHING!" The fact that such speeds are available leads me to think (probably wrongly) that there's something 'out there' that I'm missing!
  14. kellys_eye

    What's 'fast enough'?

    If that's split between three users then fair enough but we're a 2-person household and only one of us is 'hardcore' (a variable definition based on age....) surfer. I suppose if 8k TV became popular or something like Hi-res VR tourism we might need the 50Mb we currently have! but I've been...
  15. kellys_eye

    What's 'fast enough'?

    After what seems a lifetime (certainly 14 years I know of) our property is about to go fibre-to-the home. We started out with 2Mb (copper) and lived with that for over 12 years and that included running a business but we managed. A recent mobile phone mast fitment in our village gave us ~50Mb...
  16. kellys_eye

    Help Identifying this electronic component ?

    If it is C31 then the part is likely to be a 200uF capacitor rated at 10V - still difficult to tell if the designation relates to that part - need a wider shot of that area of board.
  17. kellys_eye

    Help with finding an equivalent Mosfet

    What is the application? It's usually pretty easy to find an alternative using the max voltage/current and gate drive parameters. Most parts suppliers (like Mouser, RS Components, Rapid, Farnell etc) have parametric search engines where you can simply click on the parameters you need (minimum...
  18. kellys_eye

    Help Identifying this electronic component ?

    What is the component designation (printed on the PCB but hidden by your blue circle line...)
  19. kellys_eye

    Ticking sound and won't start VCR

    How did you test them? You need an ESR checker to be sure.... You'll have to trace the pcb tracks and, perhaps, make a deliberate break in the track to isolate the output from the PSU to the remaining circuitry. Post a pic of the underside of the board and a close-up of the secondary side...
  20. kellys_eye

    Bentham 605 Current stabilised Power Supply

    'Any' reasonably large NPN device will work (TIP3055 for example) but all you're going to do at this stage is fit a pair to prove that the system works - if you can vary the voltage and limit the current with 'any' transistor (bearing in mind the current/voltage restrictions based on the...
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