half subtractor

full adder

half adder

OR gate

NOT gate

AND gate

NAND gate

NOR gate

NXOR gate

XOR gate

3 bits carry look ahead adder

2*2 binary multiplier

4X1 MULTIPLEXER

NOT gate using NAND

NOT gate using NOR

full subtractor

AND gate using NAND

OR gate using NAND

OR gate using NOR

AND gate using NOR

(4 to 2) line and (8 to 3) Line Encoders

3-BIT BINARY ADDER-SUBTRACTOR