8 - Logic Gates - Improved

Logic Gates
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Slide 1: Diapositive
ComputingUpper Secondary (Key Stage 4)GCSE

Cette leçon contient 21 diapositives, avec quiz interactifs et diapositives de texte.

Éléments de cette leçon

Logic Gates
Pens, pencils and paper needed

Slide 1 - Diapositive

Can you remember the three main logic gates?

Slide 2 - Question ouverte

Key Objective: To gain undetstanding of boolean logic and Logic Gates.
All: Know the Main three logic gates, their symbols and truth tables.

Most: Understand some simple logic gate problems.

Some: Understand more complex problem solving with logic gates.

Slide 3 - Diapositive

Anatomy of a logic gate

Slide 4 - Diapositive

Truth Table: AND
Copy down the symbol and table
Input A
Input B
Output
0
0
0
1
1
0
1
1

Slide 5 - Diapositive

AND gate with two inputs.
Input A = 1, Input B = 0
What is the output?
A
1
B
0

Slide 6 - Quiz

AND gate with 3 inputs.
Input A = 1, Input B = 1, Input C = 0
What is the output?
A
1
B
0

Slide 7 - Quiz

Truth Table: OR
Copy down the symbol and table
Input A
Input B
Output
0
0
0
1
1
0
1
1

Slide 8 - Diapositive

OR gate with 2 inputs.
Input A = 0, Input B = 0
What is the output?
A
1
B
0

Slide 9 - Quiz

OR gate with 3 inputs.
Input A = 0, Input B = 0, Input C = 1
What is the output?
A
1
B
0

Slide 10 - Quiz

OR gate with 2 inputs.
Input A = 1, Input B = 1
What is the output?
A
1
B
0

Slide 11 - Quiz

Truth Table: NOT

Copy down the symbol and table
Input A
Output
0
1

Slide 12 - Diapositive

Logic Gate Expressions
a AND (NOT b)
a
b
Output
0
0
1
0
0
1
1
1

Slide 13 - Diapositive

Open Logic.ly here
Draw
(a OR b) AND (NOT c)
with logic gates:

Slide 14 - Diapositive

(a OR b) AND (NOT c)


Now, draw the truth table.

Slide 15 - Diapositive

(a OR b) AND (NOT c)
A
B
C
Output
0
0
0
0
0
1
0
1
0
1
0
0
0
1
1
1
0
1
1
1
0
1
1
1

Slide 16 - Diapositive

Research task
Research with google:
NAND gates
NOR gates
XOR gates

Create with logic.ly a drawing using all three of these, and write the truth table for it.



Slide 17 - Diapositive

Which Logic gate is this?
A
AND
B
OR
C
NOT

Slide 18 - Quiz

Which Logic gate is this?
A
AND
B
OR
C
NOT

Slide 19 - Quiz

Which Logic gate is this?
A
AND
B
OR
C
NOT

Slide 20 - Quiz


A
1
B
0

Slide 21 - Quiz