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  1. B

    fixing Led lamp power supply

    /20..?
  2. B

    Understanding this generator - see schematic

    More likely 3.5Kw. Some had 120v and 240v output. Numbers to recognise model numbers, year of manufacture etc. are usually stamped into the motor cowling at the top. Where did the schematic come from...??
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    fixing Led lamp power supply

    https://www.ebay.com.au/itm/20PCS-400V-6-8uF-High-Frequency-LOW-ESR-Radial-Electrolytic-Capacitor-8mmx12mm/353078316095?hash=item52351b8c3f:g:fK4AAOSwqM5eu7TL&frcectupt=true
  4. B

    Replacement LED for Guitar Effects Pedal (Ibanez Tone-Lok CF7)

    All you are doing there is shorting the probes on the pcb track....that proves nothing in relation to the LED.
  5. B

    Replacement Ballast for OTT-Lite VisionSaver

    Illegal mod with all the single insulation.
  6. B

    spark gap no semi conductor transistor

    :):)
  7. B

    Replacement Sankyo VA700B02 motor

    Might have more luck looking for a complete KX-880 unit on Ebay etc. Similar hurdles with a Pioneer system I had and (in Aus) Gumtree had heaps, made more economical sense also.
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    Sony KV-8AD11 ac/dc TV power on issues.

    Yes, no problem, that was sorted out AGES ago.
  9. B

    Bridgewire detonator

    Any comment on explosives would be a no-no in here but since your query regards camera flash it might be ok to mention very basically how they work. A built in oscillator, thorugh a certain circuit, charges the cap to a predetermined high voltage dc. One can actually hear the oscillator running...
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    Replacement LED for Guitar Effects Pedal (Ibanez Tone-Lok CF7)

    An added note here that is not usual for an indicator LED such as this to actually fail. The voltage test mentioned earlier is much less invasive.
  11. B

    Replacement LED for Guitar Effects Pedal (Ibanez Tone-Lok CF7)

    show your multimeter..,...
  12. B

    Testing TVS diode

    Google is usually my first point of call, usually works. https://forum.digikey.com/t/how-to-test-the-breakdown-voltage-of-tvs-diode/999
  13. B

    Diy generator

    Obviously don't need English for a Tech ticket then, whatever that may be. Care to let everyone know what you are talking about?
  14. B

    Sony KV-8AD11 ac/dc TV power on issues.

    It's a brand new board so doubtful it is faulty(possible but doubtful) which is why I suggested looking for any external control mechanism.
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    How do I add up analogue inputs to average them?

    Arduino have 10 bit resolution on the adc and easy to use into the bargain. If you are measuring dc, then then INA219 is a good alternative and on I2c.
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    Power transistor identification

    Best way to identify many unknowns is to get yourself a component tester. Worth around AU$25 on Ebay or similar. Possible to compare with known good component and also verify faulty part.
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    Power transistor identification

    I would expect a damaged device such as this to show some sign. Removal will be the only option BUT you may do more damage to the pcb than you expect in getting them out.
  18. B

    Connecting non-solderable wires

    Low temperature silver solder will work for less bulk than a crimp. This is NOT your everyday 60/40 tin lead. Cadmium bearing is best, the other one has to poke and putty the joint, no flow like the former. Would be a costly exercise though for a couple of joints. I doubt spot welding is...
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    Low-frequency High-amplitude piezo driver using ATTiny 85

    The mosfets you are using may not be suitable. The original use logic level mosfets.
  20. B

    Turntable Spinning Fast in Reverse

    That would appear to be a major oversight by any manufacturer....... Motor type is more likely a Technics turntable motor.
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