In this article we will discover how to emulate simple logic gates, and then build them up to form more complex circuits.  By the end of this 2-part article we will have created: - Half-bit adder - Full adder - n-bit ripple carry adder formed from full adders - 4:1 line decoder - 4:1 multiplexer - 1 bit ALU that supports addition, subtraction, AND and OR operations - n-bit ALU formed from 1 bit ALUs I have a great love of electronics, and everything covered in this article I have at some point built from[...]