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  1. kellys_eye

    Need to revise, nothing entering my brain

    Since I'm over 60 I for sure have made more mistakes than you (just an assumption though) but I learned from them and use that learning to offer advice where I can. The membership of this forum do this daily, without recompense and with the intent of helping others. All we hear from you is...
  2. kellys_eye

    Need to revise, nothing entering my brain

    NOTHING is going to help you. WE certainly can't. You don't even listen or acknowledge anything we offer in advice. You have posted multiple times on your inability to learn, failure to understand, inability to take notes..... there is nothing in any of your posts that gives 'me' any...
  3. kellys_eye

    L298n connecting in parallel

    Providing the power supply can deliver the minimum required current you should be perfectly ok. Additional supply smoothing capacitors at the DC input of each board would help.
  4. kellys_eye

    Winix Air Filter won't power on. Found broken diode in power supply?

    Potentially (even quite likely). A normal measurement wouldn't cause a spark at all. If you shorted any adjacent pins (likely) then you may have destroyed a component. Get the datasheet for the main switching device (I'm assuming it's an integrated switcher?) as this will provide a useful...
  5. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    Not at all. Glad to hear it's working though. Are you planning to replace the remaining electrolytics? If the device is going to be important to you it might be worthwhile.
  6. kellys_eye

    Winix Air Filter won't power on. Found broken diode in power supply?

    Assuming there's nothing wrong with your meter then the diode is dud. Just to be sure, lift one end from the board and test again. Should read around 0.3V forward, 'infinite' in reverse.
  7. kellys_eye

    NiMH battery pack mystery

    Test each cell individually for max current - with them connected in series your max current flow will be equal to the 'worst' cell. If you want more current then you need to series/parallel them. Max current flow is a function of the cells internal resistance and connecting them in series...
  8. kellys_eye

    PS900 Oscilloscope Sweep Function Not Working

    Set the front panel trigger switch to 'external' and the one below it to 'auto' and apply a pulse to the trig-input socket and see if the spot moves. If not then the horizontal deflection and/or timebase circuitry needs to be checked. If the horizontal position control moves the spot...
  9. kellys_eye

    Urgent Xbox one help please

    Fitting ribbon cable can be very hit/miss - alignment and proper seating is crucial and the use of the retaining clip (if it has one) very important. Over-flexing of the ribbon can also cause breaks in the tracks - there is much to go wrong with even a simple item like this. Post some images...
  10. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    Breadboards are ok for jury-rigging parts to test and even some small circuit testing and that one seems as good as any you can get. You will find that you start building up a selection of parts and equipment so consider setting some space apart for it all. You might end up like me and have...
  11. kellys_eye

    COVID-19

    62 here - unvaxxed by choice. No Covid illness - ever. Close family members all fully vaxxed. More than half have had repeated Covid infections. In our outer circle we know of four under 50's that have died 'suddenly' - all vaxxed. I'm not pointing fingers nor do I want to argue the toss over...
  12. kellys_eye

    Is voltage negotiation required?

    I'm obviously behind the times on this subject - apologies - my understanding is still base don the old versions of USB1/2 where current (power) negotiation referenced 100mA or 500mA after negotiation as per this: (my bold) You won't be surprised to know I don't own any USB3 devices!
  13. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    Using higher voltage caps is ok so long as they fit physically - you obviously can't use lower rated! The voltages are correct with that cap out so it points to it having dried out/gone short. If you had an ESR meter you could check the other caps but replacing them all would be easier and...
  14. kellys_eye

    Is voltage negotiation required?

    ?? the 'negotiation' is usually related to the CURRENT the port can deliver - not the voltage. Where do you get this information from?
  15. kellys_eye

    Fluorescent replacement LED tupe light connections

    The 'K' figures are nothing to do with light levels - these are the 'colour' temperature values (from daylight white to 'blue-white'). I don't know how they manage that as you normally have to replace the LEDs with the appropriate colour (K) versions - you can't change the colour temperature by...
  16. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    The heat comes from the two 100 ohm resistors R118/R119 which is 'normal' - however with the lack of input voltage (you show 9.4V where there should be 28V) you could cut one end of R118 to see if the voltage (where you show 10.48V) rises to 30-ish volts. If the voltage doesn't rise then test...
  17. kellys_eye

    Paralleling microSD cards

    Yup. The potential intent is fully read-only and I can see the technique for 'paralleling' but would like to know if there are any particular performance issues in a real-world example and whether or not others switched the power lines (power saving).
  18. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    Not C36 - there are two wire links to the left of C36. Cut the left-most......
  19. kellys_eye

    Can I fix this old Pioneer SR303 Reverb myself?

    ....and you've splashed out on a Fluke 179!!!! Wish I had the moolah! Anyways...... Turn the dial to the yellow 'diode' position then press the yellow button. Place the probe leads across the diode. One way will (should) read 'infinite' and the other should read 0.6 to 0.8V. If it's zero...
  20. kellys_eye

    Fluorescent replacement LED tupe light connections

    Not sure what size you're changing but here in the UK I've changed out 8 complete fittings (4ft, 43W) rather than mess with the tubes/bypass etc. The whole fitting only cost £14 each (about $18) against the tube alone at £13.50 it was a no-brainer! The new fittings came with glands (and blanks...
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