Series 8
Boolean Logic
AND, OR, NOT and beyond. This series builds from the simplest logic gates through to reading, writing and evaluating full logic circuit diagrams — the foundation of how every processor works.
Logic Gates
Truth Tables
Boolean Expressions
Logic Circuits
GCSE
Lessons in this series
Three lessons covering AND/OR/NOT, the extended gate set, and full logic circuit analysis — everything you need for Boolean logic questions at GCSE.
1
AND, OR and NOT Gates
The three fundamental gates, their truth tables, and how to write and evaluate simple Boolean expressions. The building blocks of all digital logic.
2
NAND, NOR and XOR Gates
The extended gate set used in real hardware. NAND as a universal gate, XOR in arithmetic circuits, and how to trace outputs through these gates using truth tables.
3
Logic Circuits and Truth Tables
Reading circuit diagrams, building complete truth tables for compound circuits, writing Boolean expressions from diagrams and drawing circuits from expressions.
Interactive tools in this series
Logic Gate Builder
Drag and connect gates, set inputs and trace outputs in real time. Used in Lessons 1 and 2.
Boolean Algebra Practice
Enter Boolean expressions and evaluate them step by step. Used in Lesson 3.
Truth Table Quizzes
Fill in truth tables for AND, OR, NOT, NAND, NOR and XOR gates with instant feedback built into every lesson.