Help with Digital works (Circuit Design)

Thread Starter


Joined May 23, 2019
been told to design a circuit with:
- 2 digits BCD adder/subtractor using XNOR as controlled inverters for 1's complement (using full adder macro)
- 1 switch for mode (0 for add, 1 for subtract)
- 0-9 numeric keypad with priority encoder for the A and B inputs
- 7-segment display indicating polarity (small letter "c" if positive, "-" if negative)
- 3 7-segment display (common cathode) with BCD driver (7447 IC) for the final answer

hope you guys can help me. thanks in advance


Joined Mar 30, 2015
Welcome to AAC!

Post the the entire text for the problem, you're work, and what problem you're experiencing.