🔍 Why This Matters

You now know what AND, OR, and NOT mean. You know how to connect switches and make choices.

Now you’ll learn the biggest truth of all:
👉 This is the brain of the computer.

All those decisions, actions, and results you see on your screen? They start here.

 

💡 What Is a Logic Circuit?

When we combine gates to solve a problem—like checking a password or adding numbers—we call it a logic circuit.

A circuit is just a bunch of gates connected in a smart way.

And these circuits are made from transistors—tiny switches that act like gates.

 

🧠 What Is the CPU?

The CPU (central processing unit) is the part of your computer that:

  • Follows logic

  • Makes decisions

  • Runs programs

It’s made of millions of gates working together—flipping switches every second.

Every click, tap, or key you press? The CPU handles it with logic gates.

 

🧮 What Can These Gates Do?

With enough gates, you can:

  • Add numbers

  • Store memory

  • Compare things

  • Run code

  • Solve problems

It’s not magic. It’s just switches following rules.

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