Introduction

Why Digital Logic?

Every digital system — from a microcontroller to a server CPU — is built from the same fundamental building blocks: logic gates. Understanding digital logic is the foundation of electronics, computer architecture, and hardware design.

This course teaches you to implement and simulate digital circuits in JavaScript. Rather than abstract theory, you will write real functions that replicate the behavior of actual hardware gates and circuits.

You will implement:

  • Logic Gates — AND, OR, NOT, NAND, NOR, XOR, XNOR and their truth tables
  • Universal Gates — How to build any logic function from NAND gates alone
  • Boolean Algebra — De Morgan's laws, sum-of-products canonical form, truth table generation
  • Combinational Circuits — Half adder, full adder, ripple carry adder, 4-to-1 multiplexer, 2-to-4 decoder
  • Sequential Circuits — SR latch, and 4-bit binary counter

This is exactly the knowledge behind tools like tscircuit — where digital components are assembled into real PCB designs using TypeScript and React.

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