Computing
Computer Science LearnITWithMrC ⛯ Year 7 Year 8 Year 9 GCSE
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Lesson Video

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Lesson Tasks

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  • Read the lesson notes
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  • Complete the learning activities
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What do I need to Learn?

I need to learn how to explain what logic gates are.
I need to learn how to Construct truth tables for OR gates
I need to learn how to Construct truth tables for AND gates
I need to learn how to Construct truth tables for NOT gates
I need to learn how to construct truth tables for simple logic circuits.
I need to learn how to interpret the results of simple truth tables
I need to learn how to create, modify and interpret simple logic circuit diagrams

Key Terms

Logic gates AND gate OR gate NOT gate logic circuit diagram Truth table

Logic Gates

Computers are made using electrical circuits, which have only two states on or off. This is represented using binary as 0 or 1 or True or False. Logic gates take binary inputs and out put 0 or 1 or True and False.


There are three standard logic gates which are used in both computers and electronics. Each of these logic gates has a truth table which shows what the outputs will be for different inputs.


Logic Gate

You can combine Logic gates to produce a Logic circuit diagram.

Below is an example of a complex logic circuit
Logic Circuit
Click for Another example

Click in the resource bar on the 'Logic Simulator' to answer the question below

Questions

Complete the following using the Logic Simulator:

Complete the following using the Logic Simulator:

Complete the following truth tables


Click here for some more puzzles