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Type: Posts; User: Kiriakos-GR

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    Closed: Re: Elementary battery question

    Possibly 500 Taiwanese dollars.... I bet that this battery serving some short of thermal imager.
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    Closed: Re: PC based Oscilloscopes

    This model is capable to demonstrate on screen only 2.000 points Wfm/s , this is like viewing entire information of 2 kHz waveform, at 4 kHz signal you will have 50% loss or reviewed information. ...
  3. Closed: Re: Understanding vibration resistance specification impact on HW design

    Generally speaking all compliance specifications they are goods that you have to buy from IEC or other organizations.
    At my humble example with the loudspeaker cross-over at dancing room, also...
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    Closed: Re: PC based Oscilloscopes

    So, you are from India.
    The scope price this is at 199E or dollars, this is better than PC based Oscilloscope, but not sufficient than any other application than sound analysis.

    In the...
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    Closed: Re: PC based Oscilloscopes

    You may overcome this by getting a GW Instek GDS2000A at 100MHz bandwidth.
    This is entry-level scope for professional use.

    There is no Entry-level scope for hobby use, the technology in use that...
  6. Closed: Re: Understanding vibration resistance specification impact on HW design

    This is an interesting topic regarding theory, but as hundreds more that I have see in this forum, no one asking the right questions.

    If you need to follow specific compliance, the next question...
  7. Closed: Re: Common mode noise reduction by connecting ferrite SMPS core to ground?

    Something is missing from this long conversation, and this is the appropriate test and measurement instrument which will measure -> Common mode noise.
  8. Closed: Re: Temperature measurement on power mosfets during the power consumption in motor co

    Best test this is at environmental temperature 36C for 48 hours. It will pass the test if your Heat-sink it does qualify too.
  9. Closed: Re: How to measure current with a digital oscilloscope?

    Tektronix has for you a specialized probe this worth over 1200$
    You may go around this problem by finding a used probe and this is the end of the road.
    Feel free exploring by your self Tektronix...
  10. Closed: Re: How to measure current with a digital oscilloscope?

    You are unable to use any resistor because (Bench-Top) oscilloscope this is NOT isolated from earth ground.
    If you need help ? then be honest and inform us of what measuring equipment you have...
  11. Closed: Re: How to measure current with a digital oscilloscope?

    Lets start over from scratch, what Oscilloscope model do you have available there ?
    Toy scopes does not support current probes.

    On the other hand, while I own excellent instrumentation...
  12. Closed: Re: Simplest way of converting 240Vrms mains into 450VDC?

    Two last tips to add as Industrial Maintenance Electrician, what ever root you plan to follow.
    The fan will have increased consumption in humid days, and inrush current will be also increased at...
  13. Closed: Re: Simplest way of converting 240Vrms mains into 450VDC?

    I have one from the ones controlled by foot switch, I will use my GDS2102A to check it waveform.
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    [SOLVED]Closed: Re: Value of resistance and impedance

    Does he has even kinder-garder Degree as Engineer ?

    I do not watch such videos, this is bad influence to my brain cells.
    If you need to find more about electrical insulation ? Then start...
  15. Closed: Re: Simplest way of converting 240Vrms mains into 450VDC?

    SPWM sinewave this what a electronic lights dimmer produce, and motors does not like that at all, and they produce strange noises.
    I did try once to use a electronic lights dimmer to slow down a...
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    [SOLVED]Closed: Re: Value of resistance and impedance

    This is what happens when instead studying electricity due books, you watch underage kids on YouTube making footage of topics that they are clueless about them.

    impedance has importance at...
  17. [SOLVED]Closed: Re: How to use NTC temperature sensor in production

    We can talk for days about generic facts, RTD is not famous for speed this is why foods refrigeration industry does not use them.
  18. Closed: Re: 3W power resistor at 100degC, 8 hours per night, 365days per year

    I do not consider Metal oxide film and ceramic body as sensitive materials when operating at 100C.
    And I am of the ones which they did read product datasheet before delivering my opinion.

    - - -...
  19. [SOLVED]Closed: Re: How to use NTC temperature sensor in production

    Lets start over with facts this time, MCU 16 Bit this is 1$ worth item, and finest NTC this worth 1.5$
    If someone thinks about using such parts and getting results of instrumentation worth 3000$?...
  20. [SOLVED]Closed: Re: How to use NTC temperature sensor in production

    I do consider this as childish question, K type thermocouple it is a product with protective sleeve and plug, and any factory making them has expensive instrumentation and manufacturing process and...
  21. Closed: Re: Isolated vs Non Isolated DC-DC Converters

    If you application this is related to pre-amp module for microphone or turntable head, with out proper power supply you will have tremendous electrical noise issues.
  22. [SOLVED]Closed: Re: How to use NTC temperature sensor in production

    He will never answer that, for now he is taking advantage of this forum for getting ideas supposedly cutting costs in some sort of production line, that it could be his own bedroom room.
    ...
  23. [SOLVED]Closed: Re: How to use NTC temperature sensor in production

    -40 to + 40 Deg C this is a very long way ... and linearity this would be a major problem.
    I did several experiments with NTC temperature sensors, they are slow, even if my samples was Vishay /...
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    Closed: Re: UPS Battery timing calculation

    Named UPS system specifications this is at temperature of 20 Celsius, actual battery performance this is not stable and it does degrades by its day.
    I own two APC UPS both at 1000VA, both...
  25. Closed: Re: Harmonic distortion of LED driver's mains input current waveform

    Five years ago I did a video https://www.youtube.com/watch?v=veTVUhNiRC0 ( Pulsing Power Supply & AC Mains pollution )

    From the other hand at first post I am in denial to accept this graph as...
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