seven segment display driver circuit problem

Discussion in 'Homework Help' started by copper_pipe, Sep 11, 2017.

  1. copper_pipe

    Thread Starter New Member

    Sep 30, 2014
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    0
    Hi all,

    Been given an assignment today and Im having some trouble with it. The purpose of the assignment is to add two, two bit unsigned binary numbers together A0,A1, B0 and B1 and will display the resulting valu ein decimal number format on a seven segment display.

    I have done out the truth tables correctly I think but Im unsure about the circuit schematic. There are seven binary outputs A to g.

    Appreciate any help

    Thanks
    .
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    5,650
    As this appears to be homework, you need to show your best attempt to solve the problem. We can then see what you are doing right and wrong and help you spot the errors and get back on track.
     
  3. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    Ok.
    I am adding two two bit binary numbers.
    Worsed case scenario is that I will have answer containing 3 bits. The third bit is for carry over.
    Since I have 3 bits, 2^3=8.
    So the largest value my 7 segment will show is 8. Which means that I need one 7 segment display unit.
     
  4. joeyd999

    AAC Fanatic!

    Jun 6, 2011
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    To me, this sounds like a purely combinatorial logic problem. 4 inputs, 7 outputs. He needs 7 kmaps and done.
     
  5. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    It sounded like OP actually need to build the circuit...
    - 4 inputs
    - 3 outputs
    - then binary to decimal decoder ic which also acts as 7 segment driver (or, like you said, combinatorial logic to translate 3 inputs to 7 outputs to drive 7 led is 7 segment display)
     
  6. joeyd999

    AAC Fanatic!

    Jun 6, 2011
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    I see no need for a middle man.
     
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