1.3.1 Logic Gates and Circuits

Logic Diagram Free Online Simulators

Liam MCQuay Videos and Logisim

These 4 videos from Liam McQuay should help you get started with Logic Gates and Truth Tables

You can download the free opensource Logisim logic gate simulator here https://sourceforge.net/projects/circuit/. Works for Windows, Mac and Linux

Logic Circuits: Past Paper Questions

Typically in the exam, you will be given a logic problem and are asked to create a logic circuit and a truth table.

http://bit.ly/IGlogicPP

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If you want to find out more about logic gates look at the videos below

Building logic gates using transistors

Boolean Logic & Logic Gates Worksheet