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bcd adder/subtractor that will output decimal sum/difference in 2 segment display

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glen16

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can anyone help me to create a circuit for bcd adder/subtractor that will output decimal sum/difference in 2 segment display
 

this is a homework. i need to use 7483 parallel adder some of the exnor gates. for the 7-segment driver we are required to use 7447 ic. do you have a circuit diagram for this?
 

Search for "bcd adder subtractor" in G00GLE images! E.g. **broken link removed**.
 

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