Experiment 19  Comparison Basic Gates with NOR and NAND Gates
How did you build the basic gates with NOR gates and NAND gates?
Here you compare the circuit diagrams and you are able
to see some similarities.
The NOT Gate
Circuit diagram NOT gate with NOR gate.

Circuit diagram NOT gate with NAND gate.

The OR and AND Gate
Circuit diagram OR gate with NOR gates.

Circuit diagram AND gate with AND gates.

Until now the circuit diagrams do not surprise you?
However, they are a direct result of the Boolean algebra
and are caused by the socalled idempotency
and double negation law.
The AND and OR Gate
Circuit diagram AND gate with NOR gates.

Circuit diagram OR gate with NAND gates.

The XNOR and XOR Gate
Circuit diagram XNOR gate with NOR gates.

Circuit diagram XOR gate with NAND gates.

These last two comparisons, however, are striking.
They also are a direct result of the Boolean algebra.
Here the most important law of Boolean algebra,
De Morgan's laws comes into play.
For developers of logical modules blocks and computer chips,
the De Morgan laws are essential.
To understand why,
you should take a look at the theme "Boolean algebra".