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Learn how AND, OR, NOT gates make decisions—the foundation of all digital circuits
Part of Digital Logic & Computer Fundamentals
Educational content slides
A logic gate is a decision rule with no intelligence.
AND gate: Output is ON only if BOTH inputs are ON.
OR gate: Output is ON if EITHER input is ON.
NOT gate: Output is the OPPOSITE of input.
These aren't "smart." They're mechanical rules. But combine billions of them and you get a smartphone.
Test your understanding with this quiz.
A security system uses XOR gates for encryption instead of AND or OR. Why is XOR special for security?
Complete this exercise and get AI-powered feedback.
Every "smart" device is just following gate logic rules. Practice seeing your own decisions as logical combinations.
The first step to building automation is recognizing patterns.