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Assessment booklet Complete the long exam type question in your
assessment booklet - Read the question carefully and highlight key phrases
What is the question asking Be careful with spelling and grammar
8 mins
Swop booklets with your pair and assess:Clarity of answerGrammarSpellingcontent
P6 – Electricity for Gadgets
Lesson 6 – Logic gates
Learning aim: Demonstrate an understanding of logic gates and circuits in electrical systems
Learning Objectives Success Criteria
Recognise the link between transistors and logic gates.
Describe truth tables for logic gates.
Draw transistor diagrams for AND gates.
Recall what is joined together to make logic gates and what the input means in terms of voltage.(Grade E-D)
Describe the truth tables for a NOT gate.(Grade E-D)
Recall how other logic gates can be made and draw truth tables for an OR gate.(Grade C)
Recognise/Complete the circuit diagram for an AND gate and describe its truth table.(Grade D-A)
Describe truth tables for NAND and NOR gates.(Grade C-A)
MHW3Research Michael FaradayBe able to describe in 3 sentencesWhy he is a famous scientist
On white boards draw the symbols for the below textbook p240-241 Help:
Logic gate Circuit symbol
NOT
OR
AND
Logic gate Circuit symbol
NOR
NAND
Use the textbook 241to fill in the table below in your book:
Read pg240Answer question 6 and 7
Then What is the input signal in a logic
gate in terms of voltage?
Answer: Q6 0 V • Q7 0 V
NOT
Input Output
0
1
1
0
NOT gate inverts the input signal. The output is NOT the input
OR
Input A Input B Output
0 0
0 1
1 0
1 1
0
1
1
1
Output is 1 if input A OR input B is 1.
AND
Input A Input B Output
0 0
0 1
1 0
1 1
0
0
0
1
Output is 1 only if input A AND input B are 1.
NAND
Input A Input B Output
0 0
0 1
1 0
1 1
1
1
1
0
Output is the opposite of an AND gate. The output in NOT an AND
HT
NOR
Input A Input B Output
0 0
0 1
1 0
1 1
1
0
0
0
Output is the opposite of an OR gate. The output is NOT and OR
HT
Draw a truth table to find the output of this combination
ExperimentP6c02part A or B
To doRead through p241 in the text
book and answer questions 8-9 on whiteboards
Complete worksheet P6c02Q1Then challenge/ HTQ2
Answer: Q8 AND gate • Q9 OR gate
Answers to WS p6c02Q1a(i) off; off; off; on • Q1a(ii)
AND • Qb(i) off off off; off on on; on off on; on on on • Q1b(ii) OR • Q2a(i) 1 •Q2a(ii) 0 • Q2a(iii) NOT • Q2b(i) C = 0, 0, 0, 1; D = 1, 1, 1, 0 • Q2b(ii) AND.
Now try Q10
System input X
System input Y
AND gate input x
AND gate input y
Output Z
0 0 1 1 1
0 1 1 0 0
1 0 0 1 0
1 1 0 0 0
HT
Some problems to solve
• The pump on a central heating system is switched on at room temperature if the system is switched on (with the slide switch). When the temperature rises the pump needs to be switched off.
• Design a circuit that will sound a buzzer if the temperature of a hot radiator falls during the day ONLY. Include a test switch to check the operation of the buzzer.
• Design a circuit for a gardener that will warn them of cold conditions at night. The alarm should be able to be switched off.
Plenary questions
Name this circuit symbol.
A. NAND
B. NOR
C. NOT
D. OR
Name this circuit symbol.
A. NAND
B. NOR
C. NOT
D. OR
A. AND
B. NAND
C. NOT
D. OR
Name this circuit symbol.
A. OR
B. NAND
C. NOT
D. NOR
Name this circuit symbol.
A. AND
B. NAND
C. NOT
D. OR
Name this circuit symbol.
Learning Objectives Success Criteria
Recognise the link between transistors and logic gates.
Describe truth tables for logic gates.
Draw transistor diagrams for AND gates.
Recall what is joined together to make logic gates and what the input means in terms of voltage.(Grade E-D)
Describe the truth tables for a NOT gate.(Grade E-D)
Recall how other logic gates can be made and draw truth tables for an OR gate.(Grade C)
Recognise/Complete the circuit diagram for an AND gate and describe its truth table.(Grade D-A)
Describe truth tables for NAND and NOR gates.(Grade C-A)
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