Binary Adder and Subtractor Circuits: Half and Full Adder, Subtractor
Adders and Subtractors | Digital Circuits 3: Combinational Circuits | Adafruit Learning System
4 Bit Adder/Subtractor | Tinkercad
1 Prelab
Adders and Subtractors in Digital Logic - GeeksforGeeks
Binary Arithmetic Circuits
digital logic - What would be the output of A = 0100 and B = 0111 with S = 1 in a 4-bit binary adder-subtractor? - Electrical Engineering Stack Exchange
Ashan's Blog: Designing a BCD adder & subtractor with HDL