Logic Gate

A logic gate is an idealized model of computation or physical electronic device implementing a Boolean function, a logical operation performed on one or more binary inputs that produces a single binary output

And Gate

This is actually how the underlying not gate is implemented.

Or Gate

Not gate

Multiple Input Logic Gates

NAND Gate and NAND Gate and NOR Gates

These two are universal gates.

XOR and NXOR Gates

$f=x^{\prime }y+x{y}^{\prime }$

Logic Gates from Hardware

This is the part that I actually need to understand. Learn from Ben Eater.

And Gate using transistor

Not Gate using transistor