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  1. [SOLVED]Closed: Re: Adding '1' to a std_logic_vector in VHDL

    Make temp unsigned, then you can perform arithmetic on it.
    When you output it to Q, cast it as std_logic_vector
  2. Closed: Re: Hub motor with separately excited rotor and stator configuration

    I don't know if it's any help but I used to have a 600W wind turbine and it had almost no noticeable cogging torque, guess its down to the number of poles (and possibly the super large gap!), see...
  3. Closed: Re: Posting limit to prevent hogging by boring posters

    Ohh brilliant it works perfectly!! I am so sorry I had not noticed this feature before, you must be one of the only forums with it ..... thank you.

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    Hooray on the trolls...
  4. Closed: Re: Posting limit to prevent hogging by boring posters

    Actually I wouldn't mind so much if the post title had a health warning to avoid opening them, I shouldn't complain except there a bit repetitive :)
  5. Closed: Posting limit to prevent hogging by boring posters

    Could you institute a posting limit of some kind to prevent the boring constant LED & DC-DC gibberish driving everything else off the board ?
    The individual I am thinking of cross posts all this...
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    Closed: Re: DC Booster for Solar Pump

    I see several problems you need to address
    1/ What is the starting inrush of the motor & pump and where do you expect it to be supplied from ?
    2/ You seem to assume your panels will be at 100%...
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    [SOLVED]Closed: Re: Transformer saturation & ACM control

    According to ExcellentIT7100 0.144T @ 2882W. And yes I wondered if I could do without the caps moving from a half to a full bridge but I think the answer is clearly not.

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    ...
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    [SOLVED]Closed: Re: Transformer saturation & ACM control

    I agree asdf44 but of course in the real world imbalances creep in, I guess it's a question of if those imbalances are suficient to eat up the reserve flux density. ACM has low bandwidth relative to...
  9. Closed: Re: How the washing machine Automatic Load Sense works?

    I do apologise I missed the "induction motor", all the ones I have seen in the last few decades have been series wound universal motors with phase control.
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    [SOLVED]Closed: Re: Transformer saturation & ACM control

    Yes unfortunatly you confirm my feelings, the reason I am using ACM is to prevent instability due to a downstream LCL filter.
    Have to get the thinking cap on.....how about capacitors in series with...
  11. Closed: Re: How the washing machine Automatic Load Sense works?

    I will give you an idea, most washing machines know motor rpm in order to control spin speed right, so with a given power input acceleration = load!
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    [SOLVED]Closed: Transformer saturation & ACM control

    This has nothing to do with LEDS :)

    Many power converters are liable to saturate the transformer under unbalanced conditions, I am looking at a full bridge with a bridge rectifier output so there...
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    Closed: Re: Full Bridge Unfolding Cicuit

    I have seen this circuit but went my own way with a completely different drive design however I can tell you a few reasons why unfolder mosfets fail! Firstly overvoltage, I don't know if you have...
  14. Closed: Re: Quartus 19.1 on Ubuntu 18.04 problems with internet and usbblaster

    Ghaa to old to edit, anyway the Linux incantation to make USB-BLASTER work doesnt, here it is for anybody interested ----

    create the file /etc/udev/rules.d/51-usbblaster.rules with the following...
  15. Closed: Re: Quartus 19.1 on Ubuntu 18.04 problems with internet and usbblaster

    Well what I can say now is Quartus 12.0/sp2 definitely runs under XP/sp3 on a 32 bit machine as I have had it running this afternoon thanks to a gift of said software from a kind person (AFIK the...
  16. Closed: Re: Quartus 19.1 on Ubuntu 18.04 problems with internet and usbblaster

    Ahh thank you for being specific, maybe crossed wires I was talking about THIRTYTWO BIT machines running XP/SP3.

    Maybe that is the problem, if you load 13.1 into a 64bit XP machine it works, but...
  17. Closed: Re: Quartus 19.1 on Ubuntu 18.04 problems with internet and usbblaster

    In what way are you suggesting XP is corrupt when everything else on it works, for example msoffice etc ? The downloads were done on two different machines with the same results!

    Are you telling...
  18. Closed: Re: Quartus 19.1 on Ubuntu 18.04 problems with internet and usbblaster

    Thank you for your reply..........Unfortunately I discovered on the Intel download site many links were broken for earlier revisions as shown in the following table

    13.1 prog XP32 X App failed to...
  19. Closed: Re: What is the best way to interface MCU (STM32F4 series) with FPGA board (Artix-7)

    Parallel interfaces are often simpler to implement, enable random access but at higher clock speeds (say >50Mhz) skew can become a problem.
    Serial interfaces do not suffer skew problems to such a...
  20. Closed: Quartus 19.1 on Ubuntu 18.04 problems with internet and usbblaster

    Hi All, am appealing to anybody who has a similar environment to give me a few tips here :)

    The internet problem is weird, the system default is ffox 70 that runs fine standalone but none of the...
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    [SOLVED]Closed: Re: ACS712-5A AC Current Reading - How to?

    I am not sure what you are asking, I assume you know the nominal zero-current output voltage is VCC/2 (2.5V). The ACS712 is a 5V part as is the PIC, I don't see anything strange with the PIC's DAC so...
  22. Closed: Re: Problem with PIC16F877A, infinite loop output voltage 0.6V

    Assuming your first bit of code is actually complete (unlike the second) I don't see you have enabled PORTD as outputs at any point so I am not surprised you cannot see any output BUT also measuring...
  23. Closed: Re: PIC18F based Motor Controller Design, Is it good?

    Hello, you have several problems there
    1/ The high side gate must be driven to Vgate + drain supply, you say 200V, an L293D cannot do that.
    2/ 4N37 or similar opto-couplers are very slow and will...
  24. [SOLVED]Closed: Re: Lenovo laptop problem during installing LINUX OS

    What Distro exactly are you using and what is the media, what is the model of laptop, how much memory, what sort of storage etc etc!!
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    Closed: Re: IR2110 simulation problem is pspice

    Your FET wiring is crazy and wrong!! I am not surprised with that awful symbol, is that what you get paying $$$$$ for Orcad ?
    If I were you I would use a free simulator with decent symbols like...
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