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