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LTspice simulation distortion function

Discussion in 'Circuit Simulation & PCB Design' started by gilmanli, Sep 28, 2010.

  1. koolguy

    koolguy Active Member

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    Please, you tell which ic should be used??
     
  2. koolguy

    koolguy Active Member

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    This is some part of it to be designed.!!
     

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  3. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Ask people who are in India.

    I am in Canada where everything is available.
    But you are in India where most ICs are not available.

    I don't know what your 15 LEDs are supposed to do.
     
  4. dave

    Dave New Member

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  5. koolguy

    koolguy Active Member

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    please, help i want to complete the circuit!!
    I already told you this is for scrolling message on led's displays.

    eg: YouTube - MICRO CONTROLLER PIC16F84A MATRIX LED DISPLAY this video use micro controller but i want to make it without using it.
     

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  6. koolguy

    koolguy Active Member

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    please reply..!!
     
  7. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    Ritesh,
    They way that you have shown the LED diodes connected are as individual 7 segment DIGIT displays.
    They can only display '0 thru 9' and 'A thru F' and a few symbols.

    The display cannot scroll left as shown in your link, that link led display uses a DOT matrix and the scrolling characters are moved one column left, which gives a scrolling effect.
    Your display will be just number changes. eg: '12' , '23', '34' which is not going to look like scrolling.
     
  8. koolguy

    koolguy Active Member

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    why?? i have stimulate it.
     
  9. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    If you are satisfied that the simulation of your circuit really works and gives you the results you are expecting, WHY dont you build it in order to confirm your design.????

    Its make your mind up time.:)
     
  10. koolguy

    koolguy Active Member

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    Yaa, i am doing it.
     
  11. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    Thats great, lets know how it goes.
     
  12. koolguy

    koolguy Active Member

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    hi, i want only one 7447 ic to be connected to displays, but when there is no input to 8421 pins it should give output i.e. blank.
     
  13. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    Use a 4 input OR gate to detect 1,2,4,8 LOW and set the BI pin LOW
     

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  14. koolguy

    koolguy Active Member

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    how, why to use or gate IC.
     
    Last edited: Jan 23, 2011
  15. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    hi,
    How else can you detect that the 7447,,,, 8,4,2,1 inputs are LOW, so that you can switch the 7447 BI pin low in order to BLANK the leds, which you asked how to do.???
     
  16. koolguy

    koolguy Active Member

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    If i connect directly diode to 8421 pins and at the BI pin with low by few ohms resistance.
     
  17. koolguy

    koolguy Active Member

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    I have downloaded now multisim 10.1, and i want to see the output in displays.how??
     
  18. SODA

    SODA Member

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    Hi Ritesh,
    I'm new to this forum but I've never seeing some one hijack a thread like you just did and up to 14 pages.... Wow how about showing some respect to the forum and open a new thread
    You just go on and on like a locomotive you know
     
  19. audioguru

    audioguru Well-Known Member Most Helpful Member

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    Ritesh does the same hijacking on many other electronics forums.
     
  20. koolguy

    koolguy Active Member

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    I want to connect buffer ic from the output of AND gates for reducing loading effect on ics, please tell which ic should be used??
     
  21. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    PLEASE start a NEW THREAD.!:rolleyes:
     

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