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

## Lesson Video 54

• Watch the Lesson video
Make notes on your notes sheet.
Make notes on your notes sheet.
• Complete the learning activities
Make any notes on your notes sheet.
• Check the Learning outcomes

## 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.

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

Below is an example of a complex logic circuit

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