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Type: Posts; User: KlausST

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  1. Replies
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    Closed: Re: UC3845 ETD29 transformer PWM signal

    Hi,


    You know: No signal goes one way, it always needs a return path. And if the return path is long and high impedance the whole signal will be slow and ringing.
    --> Donīt see only the signal...
  2. Replies
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    Closed: Re: UC3845 ETD29 transformer PWM signal

    Hi,

    PCB layout:

    See the picture. I showed the current flow loop for the gate current.
    A good layout: should have as low as possible enclosed loop area. (low EMI, EMC) And it should have all...
  3. Closed: Re: Tool for transforming python code to FPGA for Machine Learning

    Hi,

    Maybe there is...but it's against the idea software vs hardware,

    It's an often made mistake to look/write HDL like software.
    Software is processed sequentially, one instruction after the...
  4. Closed: Re: Where to get schematics about SCRs full-wave triggering circuits ?

    Hi,

    GROUND is just a name. A name for the node which the designer (you) decided to be the voltage reference.
    Theoretically any node in any circuit may be called GROUND. It does no necessarily...
  5. Replies
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    Closed: Re: UC3845 ETD29 transformer PWM signal

    Hi,

    You know you gave just half of the requested informations...
    You will have your reasons....
    Thus I can't verify the some items.

    Anyway. Sadly you wasted almost one layer. The red layer is...
  6. Replies
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    Closed: Re: UC3845 ETD29 transformer PWM signal

    Hi,

    Please show:
    * the PCB layout
    * the brand and exact type of R59 (datasheet)
    * where at the PCB exactly you connected scope_GND and scope_signal

    Klaus
  7. Closed: Re: Help needed; Check of PCB and some other questions

    Hi,


    your traces on your PCB will introduce some resistance (mainly depend on width, length and thickness) and impedance (almost independent of thickness and width)..
    Thus - even if the power...
  8. Closed: Re: Help needed; Check of PCB and some other questions

    Hi,

    I agree FvM. A GND plane shold give some benefit.
    Maybe add some capacitors for supply voltage stabilisation.
    And maybe add GROUNDed tracks between the signal lines to suppress capacitive...
  9. Closed: Re: Looking for an non-invasive sensor for a fitness machine

    Hi,

    There is a motor?
    There are wires?
    You can measure the current?

    All these informations I miss in post#1.


    Klaus
  10. Replies
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    Closed: Re: Steady state power system design

    Hi,

    I'd consult the datasheet.
    And if it does not give the expected information I'd start a simulation.

    You may also build the circuit and use a scope.


    Which R and which C are you talking...
  11. Replies
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    Closed: Re: ST7036i and mikroc STUCK

    Hi,


    Many users expect this. And from my experience especially those who give vague informations.
    Glad to see that this isn't the case here.


    I can not detect a clear question...
  12. Closed: Re: Force sensitive resistor controlling output voltage

    Hi,

    I'd go with the Opamp solution.
    It is simple. Just a couple of parts. And it works perfectly. It's not the problem of the Opamp that it "malfunctioned".

    The drawback of the non Opamp...
  13. Replies
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    Closed: Re: 1:16 demux of sinusoidal signals

    Hi,

    Quite straight forward:
    Since sinusoidal signals are analog signals:
    Go to any electronics distributor's internet site of your choice and do a search for "analog MUX".

    Hints: you will...
  14. Replies
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    Closed: Re: ST7036i and mikroc STUCK

    Hi,

    What do you expect from us.

    You don't show your code, so we don't have the chance to verify it. Or do you expect someone writing the whole code for you?
    No information about the used IDE,...
  15. Replies
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    [SOLVED]Closed: Re: Delay time calculation

    Hi,


    In my eyes there is no clock divider .... indeed I expect a clock multiplier. (PLL)
    Clock cycles =(time delay) *(clock frequency/4).
    If you replace with the values of your post:
    Clock...
  16. Closed: Re: Where to get schematics about SCRs full-wave triggering circuits ?

    Hi,

    Eventually you dud whatvwe told you from the beginning (keep it most simple, remove R5)... and now it works.

    It works like expected. Well done.

    ********
    All is very basic.... and could...
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    [PIC]Closed: Re: interfacing 74HC4051 with pic18f4550

    Hi,

    general rule:
    Donīt leave any input floating!.

    Klaus
  18. Closed: Re: Where to get schematics about SCRs full-wave triggering circuits ?

    Hi,

    and set your Scope input to "DC".

    Klaus
  19. Closed: Re: Where to get schematics about SCRs full-wave triggering circuits ?

    Hi,

    Why do you use R5? (It makes things more complicated than necessary)

    What does tell you the SCR is not fully ON?

    Klaus
  20. Closed: Re: the inductive impedance connected to drain can cause negative resistance at gate

    Hi,

    you just post a snippet of the text. We donīt know the context. So we need to guess.

    I guess it should be "impedance" instead of "resistance". And this may be caused by the C_GD. Also do a...
  21. Replies
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    [SOLVED]Closed: Re: Interface Temperature Sensor

    Hi,


    Even EXCEL can do.

    Klaus
  22. Closed: Re: SMA-Microstrip transition removal for large-signal measurement of PA

    Hi,

    And I wonder where the problem is to post the requested back side.

    I'm no HF guru, but what I've learned so far is, that - especially with HF - the GND plane is as important as the signal...
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    Closed: Re: Yamaha DD-50 need help please

    Hi,

    You don't give much information.
    The obvious first thing to do is reading the manual.

    There is a manuat section "Adjusting the Pad's Sensitivity".

    Klaus
  24. Replies
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    Closed: Re: Engineering in times of Covid-19

    Hi,

    First: I'm no biological expert, so all I can do is use the values given by experts and do some calculations.

    Experts say the biological half time of corona virus on usual plastics and...
  25. [SOLVED]Closed: Re: Effect of LC filter in simulation of BTL H-Bridge inverter?

    Hi,


    Actually I can't find the requested screen.
    Thus I can't verify the deadtime.

    Generally S1 and S2 need to come from the same comparator with exact and low dead time.
    (The same applies...
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