Binary Lesson 3 (Logic Gates)

Logic Gates
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Slide 1: Slide
ComputingLower Secondary (Key Stage 3)

This lesson contains 18 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 50 min

Items in this lesson

Logic Gates

Slide 1 - Slide

What is this diagram showing?
How is binary involved?

Slide 2 - Open question

Binary and logic gates 
Aspire: To be-able to understand the three different logic gates (NOT, AND, OR).

Conquer :To be-able to solve several gate problems. 


Slide 3 - Slide

DO now answer
This circuit is showing a lightswitch and light bulb, the light switches have 2 states on and off. 

Slide 4 - Slide

What is a Logic Gate?
A logic gate is a device that acts as a building block for digital circuits. 

They perform basic logical functions that are fundamental to digital circuit.

Slide 5 - Slide

The most common logic gates are:

AND Gate

NOT Gate 

OR Gate

Slide 6 - Slide

Slide 7 - Slide

NOT Gate - Diagram  Table
Output is true if:​ Input is false​
Output is false if:​ Input is true

Slide 8 - Slide

AND Gate - Diagram and Truth Table
Output is true if: All inputs are true

Slide 9 - Slide

OR Gate-Diagram and Truth Table
Output is true if:​  At least one Inputs is true

Slide 10 - Slide

What is a logic gate?
A
A circuit
B
A number
C
A computer
D
A light switch

Slide 11 - Quiz

What is the rule for a not gate
A
The value is flipped
B
Both must be on
C
One must be on
D
Both should be off.

Slide 12 - Quiz

What is the rule for a and gate
A
The value is flipped
B
Both must be on
C
One must be on
D
Both should be off.

Slide 13 - Quiz

What is the rule for an or gate
A
The value is flipped
B
Both must be on
C
One must be on
D
Both should be off.

Slide 14 - Quiz

Multiple Gates
Gates can be connected to other gates for more complex circuits​
Below we can see an AND gate along with a NOT gate. 

Slide 15 - Slide

Multiple Gates
Gates can be connected to other gates for more complex circuits​
Below we can see an AND gate along with a NOT gate. 

Slide 16 - Slide

Complete the circuits worksheet

Slide 17 - Slide

Extension tasks
If you complete the worksheet, use 1 of these 4 extension tasks to develop your skills.

Slide 18 - Slide