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  1. kellys_eye

    Home Based Income as an Electronics Hobbyist

    I don't suppose there's much room for home based businesses any more - unless it's in sales. We started a small business from home many years ago that quickly turned into needing premises to hold and distribute stock before we progressed into owning a shop and selling direct to the public. The...
  2. kellys_eye

    How to disable DT9205A auto power off?

    Increase the value of C19 to make it stay on longer (put another capacitor in parallel with it).
  3. kellys_eye

    LED power on

    If the LEDs have no resistors then they MUST have another controller module associated with them. If they could be run using 'just' resistors then, for cost purposes alone, they would be. Given that they aren't then although they might work using a dropper resistor it will be (a) inefficient...
  4. kellys_eye

    LED power on

    I would suggest that the LED isn't driven directly but from a CC (constant current) source situated elsewhere. It may even be PWM (pulse width modulated) as the inclusion of the capacitor is inevitably to bypass/decouple spurious noise on the power lines. No way is that a 15W LED (no heatsink...
  5. kellys_eye

    Knowledge Threshold from Hobbyist to Professional

    It's pointless and unnecessary. You either learn what you need to know to achieve a particular task or you exceed that knowledge and 'turn it down' a bit and still do it, banking the extra experience for when it is required. What that knowledge is and what qualifications are necessary to...
  6. kellys_eye

    Wall Charger 120VAC to 5VDC

    Seems as if that device might have been a one-off for a particular PSU manufacturer. The 'quasi resonant etc' aspect is common to a lot of such devices however none that my searching found have the built-in high voltage MOSFET to do the switching - they ALL seem to rely on external MOSFET...
  7. kellys_eye

    Power Amp Repair Help - Fuses keeps blowing

    Probably blown the MOSFETs - take them out and test them.
  8. kellys_eye

    Wanted: Need a n 8 feed coiled cable or similar..

    If you want to (or need to) maintain the waterproofing capabilities you are NOT going to do that with tape.
  9. kellys_eye

    Trying to get a replacement

    Have you determined that the lead is faulty?
  10. kellys_eye

    MTC-353-0515

    Does it need to be the same physical dimensions? If not then any PSU with the appropriate output characteristics that will physically fit in its place will do the same job. Post pics of the labels on it (or a link to a datasheet). Datasheet...
  11. kellys_eye

    How to build a millivolt signal conditioning circuit with compensation?

    I'm not so sure you're qualified to offer that suggestion either.
  12. kellys_eye

    Newbie needs help adding a remote to winch

    Another 10+year thread resurrection? Is this the second coming or what?
  13. kellys_eye

    Need help with a project

    Sow us a better view of the whole board. Why is there an isolated red cable floating around?
  14. kellys_eye

    Help adding audio out to a TV

    Dragged up 10 year old thread? Spare me....
  15. kellys_eye

    Beware buying from china

    Buy cheap, buy twice.
  16. kellys_eye

    About AT29C010A help please

    Looks like a key card (early version) to me. The only data on that chip will be the code necessary to unlock whatever that circuit board plugged into.
  17. kellys_eye

    Comedy Thread

    Yes.:D
  18. kellys_eye

    Adding an audio output to an old answering machine

    Potentially, taping a microphone directly to the speaker and feeding it to your laptop/desktop/whatever would be easier.
  19. kellys_eye

    NiCd to Li-ion battery pack conversion successful but has one strange issue

    The BMS you are using has a maximum instantaneous current protection value of 35A which is clearly being exceeded by the power tool at startup hence the protection circuitry is being brought into action. Getting a board (BMS) that allows a higher instant amperage would fix it. A more...
  20. kellys_eye

    pioneer cdj 1000mk2 coil problems

    The inductors are inevitably power signal conditioning components and would only 'explode' if there was significant 'dirt' on the supply lines. You could/should check the smoothing capacitors related to them (C501/C502 for L501 and L502 respectively) for potential short circuits else check the...
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