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Recent content by juvan

  1. J

    Surface charge density of a charged disk

    Hello, I am stuck with a problem, trying to numerically simulate, with a Method of Moments (potential of a single layer (whatever that is exactly)), the situation where I have 2 charged conductive disks, with a conductive ball in the middle. If i tried explaining the whole problem with words, it...
  2. J

    Driving a speaker (or headphones) with ARM

    Driving a speaker (or headphones) with uC Hello I hope this is the correct place to post this question. If not, I apologize. I would like to connect a sound playing device (speaker, headphones), which ever is easier, to my ARM's ( LPC2138 ) DAC converter. My question is, what should the...
  3. J

    MATLAB: Symbolic function problems

    Q: Write a function "xr = sreal(x)" which returns a symbolic expression representing the real (of "ireal(x)" for imaginary) part of x(t). (e.g. x(t) = exp(i*t) + exp(2*i*t)), any clues?? The real and imag functions don't return anything useful. Having crazy problems with this :S Any/All help...
  4. J

    MATLAB PROBLEMS pls answer this as soon as possible i can pay you

    Sorry man, I was out, but this is the code for the first part 1.a) syms t x = exp(i*2*pi*t/16) + exp(i*2*pi*t/8); real_x = cos(2*pi*t/16) + cos(2*pi*t/8); % This was done by hand (don't know if there is a function for euler's formula) imag_x = sin(2*pi*t/16) + sin(2*pi*t/8); % This also...
  5. J

    MATLAB PROBLEMS pls answer this as soon as possible i can pay you

    The first one is very easy I think, just use the euler's formula: e^(j*x) = cos(x) + j*sin(x) and then separate the imaginary part from the real part and plot them seperatly, that is as far as the a) goes. So for the first part e^(j*2*pi*t/16) = cos(2*pi*t/16) + j*sin(2*pi*t/16), and similarly...
  6. J

    C6713 DSK can't connect to target error (with a youtube clip)

    Grettings, as the main title says my error of the day is "can't connect to target". I thought it'd be a good idea for me to just show you the problem, so this time I've recorded my desktop and shown you the situation, since, I think this way you will be able to understand me and the problem...
  7. J

    Software for LPC213x phillips board?

    Thanks for the fast reply, I will give it a try. But still most of them are made for windows as far as i can see.
  8. J

    Software for LPC213x phillips board?

    Hello there, for my collage course we have a lpc213x devel. board with an ARM uC, and in school we're running windows, but I have linux and the program (winIDEA IDE) which we use in school isn't suited for linux. So to try it out at home I've ran it under wine but the winIDEA 2010 edition...

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