Logic design starts with , a mathematical system where variables have only two possible values: True (1) or False (0) . High Voltage (5V or 3.3V): Usually represents a binary 1. Low Voltage (0V): Usually represents a binary 0.

By using these two states, we can represent numbers, text, and complex instructions. 2. The Logic Gates: The Building Blocks

Adders (used for math), Multiplexers (used to select between different data signals), and Decoders.

Most sequential circuits are "synchronous," meaning they only change state when a master clock signal pulses. This keeps the billions of transistors in a CPU working in perfect harmony.

Known as "universal gates" because any other logic gate can be built using only these types. 3. Combinational Logic: The Decision Makers

Simply flips the input (0 becomes 1, 1 becomes 0).

Designers use Truth Tables to map out every possible input combination and its resulting output, then simplify the logic using Karnaugh Maps (K-Maps) to ensure the circuit uses the fewest gates possible. 4. Sequential Logic: The Memory

Unlike combinational logic, sequential logic depends on both current inputs and . This is how computers "remember" things.