XOR circuit using AND and OR gates

XOR circuit using NAND gates

Code conversion from BCD to Gray code

RS flip-flops using only NOR or only NAND gates

Clocked RS flip-flops

RS flip-flop using NAND gates

Dynamic D flip-flop

full adder

: AND gate made from NAND gates

OR gate made from NAND gates

half adder

a half adder is implemented exclusively using AND/NAND or OR/NOR gates

Half subtractor

Full subtractor

Static D flip-flop

full adder

Code conversion from 0-9 format to BCD

Code conversion from BCD format to 0-9 decimal