LABORATORY HANDBOOK FOR DIGITAL ELECTRONICS (DEE 2034) POLYTECHNIC STUDENTS

LABORATORY HANDBOOK FOR
DIGITAL ELECTRONICS (DEE 2034)

POLYTECHNIC STUDENTS

ELECTRICAL ENGINEERING DEPARTMENT

i

LABORATORY HANDBOOK FOR
DIGITAL ELECTRONICS (DEE 2034)

POLYTECHNIC STUDENTS

Mohd Raziman Bin Razmi
Robiah Binti Zakaria

POLITEKNIK SULTAN IDRIS SHAH
Sg. Lang, 45100 Sg. Air Tawar
Selangor

ii

HAK CIPTA TERPELIHARA
ALL RIGHT RESERVED

Hak cipta terpelihara. Tiada bahagian daripada buku ini boleh diterbitkan semula, disimpan untuk pengeluaran atau ditukarkan ke
dalam sebarang bentuk atau dengan sebarang alat juga pun,sama ada dengan cara elektronik,gambar serta rakaman dan
sebagainya tanpa kebenaran bertulis penulis atau Politeknik Sultan Idris Shah(PSIS), Sabak Bernam terlebih dahulu.
All right reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical including photocopy, recording, or any information storage and retrieval system, without permission in writing from
authors or Polytechnic Sultan Idris Shah, Sabak Bernam.

iii

TABLE OF CONTENTS

Contents Pages
1. Lab 1 Boolean Operations 1
2. Lab 2 Boolean Operations 9
3. Lab 3 Data Processing Circuit 17
4. Lab 4 Flip Flops 26
5. Lab 5 Counters 36
6. Lab 6 Shift Register 45
7. Rubric: Practical Observation 53
8. Rubric: Lab Report 55

iv

EXPERIMENT NO. :___________________________________________DUE DATE : ________________
EXPERIMENT TITLE : _________________________________________ GROUP : ________________
LECTURER’S NAME : _____________________________________________________

_____________________________________________________

NO REG. NO. STUDENT NAME SECTION
1
2

PRACTICAL OBSERVATION LAB REPORT

CRITERIA Marks CRITERIA Marks
(70%) (30%)
Submit
Attitude /Punctuality (5%)
(5%)
Neat
Teamwork (5%)
(5%)
Theory Preparation/
Tools Preparation/ Question
cleanliness (5%)
(5%) Discussions
Skills (5%)
(15%) Conclusion
Circuit Installation (5%)
(20%)
Results / Attachment/ Reference
Data collection (5%)
(20%)

TOTAL TOTAL
(to be filled after each session)
(to be filled by during each session)

TOTAL
MARKS

Prepared by: Checked by: Verified by:
Name: Name: Name:

1

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 1

Title : BOOLEAN OPERATIONS
Aim : Apply Boolean algebra in logic circuits analysis and design.
Equipment : Integrated Circuit (7402, 7404, 7408, 7432), Resistor (300Ω), LED.
Procedure :
1. Prepare all equipment as state above.
2. Verify the logic gates.
3. Refer to Figure 1, make a circuit connection from the circuit as shown in Figure 1(a) to Figure 1(d) and

record your result in table 1.
* If input gate is 1, connect to the positive polarity battery (+ve)
while input gate is 0 connect to the negative polarity (-ve).

AB

+ Ve R1

AND LED

IC 7408

Figure 1
2

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 1

A F1 A F2
B B

Figure 1(a) Figure 1(b)

A F3
B

Figure 1(c)

A F4
B

Figure 1(d)
4. According to the logic equation below, draw the combinational logic circuit (without simplification) in

Figure 2 for expression Y and Figure 3 for expression Z using AND, OR and NOT gate.
i) Y =( A + A B ) C
ii) Z =( A + B ) C

5. Refer to Figure 2 and Figure 3, make a circuit connection to prove that Y = Z and record your result in
Table 2.

6. Please attach a relevant circuit design photo for Figure 2 and Figure 3.

3

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 1

Question:
1. Why the result of Y and Z is the same?

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( 5 marks)

Result :

Input Table 1 F4
AB Output (LED)
00
01 F1 F2 F3
10
11 ( 8 marks )

4

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 1

Table 2

Input Output (LED)

AB C Y Z

000

001

010

011

100

101

110

111 ( 8 marks )

( 2 marks )

Figure 2
5

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 1

( 2 marks )

Figure 3

Discussion :
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( 5 marks)

6

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 1

Conclusion :
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
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( 5 marks)

Attachment/ Reference :

__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

7

8

EXPERIMENT NO. :___________________________________________DUE DATE : ________________
EXPERIMENT TITLE : _________________________________________ GROUP : ________________
LECTURER’S NAME : _____________________________________________________

_____________________________________________________

NO REG. NO. STUDENT NAME SECTION
1
2

PRACTICAL OBSERVATION LAB REPORT

CRITERIA Marks CRITERIA Marks
(70%) (30%)
Submit
Attitude /Punctuality (5%)
(5%)
Neat
Teamwork (5%)
(5%)
Theory Preparation/
Tools Preparation/ Question
cleanliness (5%)
(5%) Discussions
Skills (5%)
(15%) Conclusion
Circuit Installation (5%)
(20%)
Results / Attachment/ Reference
Data collection (5%)
(20%)

TOTAL TOTAL
(to be filled after each session)
(to be filled by during each session)

TOTAL
MARKS

Prepared by: Checked by: Verified by:
Name: Name: Name:

9

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 2

Title : BOOLEAN OPERATIONS
Aim : Design logic expressions from the truth table.
Equipment : Integrated Circuit (7404, 7408, 7432), Resistor (300Ω), LED.
Procedure :

PART A (SOP)

1. Prepare all equipment as state above.
2. Verify the logic gates.
3. Draw an equivalent truth table in Table 1 of the Boolean expression below.

Y=ABC+ABC+ABC+ABC+ABC
4. Refer to Table 1, simplify the equations by using K-maps in Figure 1.
5. Refer to Figure 1, draw the logic circuit in Figure 2.
6. Make a circuit connection to prove that Y (theory) = Y (practical) and record your result in
7. Table 1.
8. Please attach the circuit connection photo for Y (Practical).

10

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 2

PART B (POS)

1. Simplify Boolean expression below, then draw an equivalent logic circuit in Figure 3.
X=(A+B).(A+B).(A+B)

2. Make a circuit connection and fill in the result in Table 2.

Question: (5 marks)
1. Draw the logic circuit for X without simplify. ( 8 marks)

Result :

Table 1

Input Output

A B C YY
(theory) (Practical)

000

001

010

011

100

101

110

111

11

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 2

Table 2

Input Output

ABX

00
01
10

11 ( 2 marks)

( 4 marks )

Figure 1
12

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 2

Figure 2 ( 3 marks )

( 3 marks )

Figure 3
13

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 2

Discussion :
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( 5 marks)

14

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 2

Conclusion :
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)
Attachment/ Reference :

__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

15

16

EXPERIMENT NO. :___________________________________________DUE DATE : ________________
EXPERIMENT TITLE : _________________________________________ GROUP : ________________
LECTURER’S NAME : _____________________________________________________

_____________________________________________________

NO REG. NO. STUDENT NAME SECTION
1
2

PRACTICAL OBSERVATION LAB REPORT

CRITERIA Marks CRITERIA Marks
(70%) (30%)
Submit
Attitude /Punctuality (5%)
(5%)
Neat
Teamwork (5%)
(5%)
Theory Preparation/
Tools Preparation/ Question
cleanliness (5%)
(5%) Discussions
Skills (5%)
(15%) Conclusion
Circuit Installation (5%)
(20%)
Results / Attachment/ Reference
Data collection (5%)
(20%)

TOTAL TOTAL
(to be filled after each session)
(to be filled by during each session)

TOTAL
MARKS

Prepared by: Checked by: Verified by:
Name: Name: Name:

17

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 3

Title : DATA PROCESSING CIRCUIT

Aim : Apply the basic design principles to the more complex encoder and decoder design.

Equipment : Integrated Circuit 7447, Resistor 300Ω X 7, 7 Segment X 1 (Command anode).

Objective : From the experiment, the student will be able to:-

1. Understand the theory and practice of a decoder and numeric display
circuit.

2. Understand IC7447 and seven segment display used as a decoder and
numeric display circuit.

3. To build and test the circuit.

Theory :

Decoder, Numeric Display

Theory of A seven-segment L.E.D. display

A seven-segment display may have 7, 8, or 9 leads on the chip. Usually leads 8 and 9 are decimal points. The figure
below is a typical component and pin layout for a seven segment display.

18

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 3

The light emitting diodes in a seven-segment display is arranged in the figure below.

Diode Placement in a Seven Segment Display, No Decimal
As shown below, there are two types of 7 segment displays, common cathode and common anode. Both of them
produce the same result, it is just how to operate it.

19

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 3

a) Common Anode
The wiring for a common anode is shown below:

Common Anode Internal Wiring
b) Common Cathode

The wiring for the common cathode is shown below:

Common Cathode Internal Wiring
20

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 3

Procedure :
1. Connect a circuit as shown in figure 1

2. You can use jumper wire as a switch.
3. Before you switch ON the circuit, let’s your supervisor check it’s first.
4. Then switch ON the power supply.
5. Observe the output of seven segment display, fill in the results ‘1’ for ON and ‘0’ for OFF in table 1.
6. Please attach three relevant circuit photo from the result in Table 1.

Question:
1. Connect pin 3 of IC7447 to ground. Repeat the input as table 1. What happened to the output display?

Do observation of your findings.
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

21

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 3

Result :

Table 1

INPUT OUTPUTS

DCBA a b c d e f g symbol
(20 marks)
0000

0001
0010

0011

0100

0101

0110

0111

1000

1001

1010
1011

1100

1101

1110

1111

22

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 3

Discussion :
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
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( 5 marks)
Conclusion :
__________________________________________________________________________________
__________________________________________________________________________________
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( 5 marks)

23

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 3

Attachment/ Reference :
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

24

25

EXPERIMENT NO. :___________________________________________DUE DATE : ________________
EXPERIMENT TITLE : _________________________________________ GROUP : ________________
LECTURER’S NAME : _____________________________________________________

_____________________________________________________

NO REG. NO. STUDENT NAME SECTION
1
2

PRACTICAL OBSERVATION LAB REPORT

CRITERIA Marks CRITERIA Marks
(70%) (30%)
Submit
Attitude /Punctuality (5%)
(5%)
Neat
Teamwork (5%)
(5%)
Theory Preparation/
Tools Preparation/ Question
cleanliness (5%)
(5%) Discussions
Skills (5%)
(15%) Conclusion
Circuit Installation (5%)
(20%)
Results / Attachment/ Reference
Data collection (5%)
(20%)

TOTAL TOTAL
(to be filled after each session)
(to be filled by during each session)

TOTAL
MARKS

Prepared by: Checked by: Verified by:
Name: Name: Name:

26

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 4

Title : FLIP FLOPS
Aim : Apply JK flip-flops to construct T flip-flop and D flip-flop.

Equipment : 5V DC power supply/ 9V battery, Integrated Circuit (74112 x 1 & 7404 x 1),
Resistor (300Ω x 2), LED x 2, Breadboard and jumper wire.

Objective : From the experiment, the student will be able to:-

4. The theory and practice of a flip-flop circuit
5. The modes of operation of a J-K flip-flop.
6. The combination J-K flip-flop to conversion T and D

Theory :

J-K FLIP FLOP

Another type of Flip flop is JK flip flop. It differs from the RS flip-flops when J=K=1 condition is not

indeterminate but it is defined to give a very useful changeover (toggle) action. Toggle means that Q and Q
will switch to their opposite states.

The JK Flip flop has clocked input Cp and two control inputs J and K.

Figure (i): JK Flip Flop Logic Symbol Figure (ii): JK Flip Flop Truth Table

27

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 4

JK Flip Flop with Asynchronous Input
 The J and K inputs are called synchronous inputs since they only influence the state of the flip flop when

the clocked pulse is present.
 This flip flop can also have other inputs called Preset (or SET) and clear that can be used for setting the

flip flop to 1 or resetting it to 0 by applying the appropriate signal to the Preset and Clear inputs.

Figure (iii): Logic Symbol and Truth Table

T FLIP FLOP
 The T flip flop has only the Toggle and Hold Operation.
 If Toggle mode operation. The output will toggle from 1 to 0 or vice versa.

Figure (iv): T Flip Flop Logic Symbol Figure (v): T Flip Flop Truth Table
28

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 4

D FLIP FLOP
 Also Known as Data Flip flop
 Can be constructed from RS Flip Flop or JK Flip flop by addition of an inverter.
 The inverter is connected so that the R input is always the inverse of S (or J input is always
complimentary of K).
 The D flip flop will act as a storage element for a single binary digit (Bit).

Figure (vi): D Flip Flop Logic Symbol Figure (vii): D Flip Flop Truth Table

29

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 4

Procedure:
PART A:- J-K flip-flop

1. Connect a circuit as shown in figure 1.

+ 5v

4

3 set 5
JQ

1
IC 1

2 clr 6
K Q

15

SW1 R2 R1

- 5v + 5v LED 2 IC 1 : 74112
LED 1 R1,R2 : 300 Ω
Figure 1
Vcc = pin 16
Gnd = pin 8

2. Before you switch ON the circuit, let’s your supervisor check it’s first.

3. Then switch ON the power supply.

4. Adjust J and K according to Table 1. Touch once switch SW1 to trigger the clock ( Cp ).

5. Observe the LED’s and record the result in Table 1. LED ON = 1, LED OFF = 0.

6. Connect “set” at pin 4 to ground ( logic 0 ) and adjust J and K according to Table 2.

7. Please attach a photo for Figure 1, Figure 2 and Figure 3.

Question:

1. What happen to the output if set=1 and clear=0. (5 marks)

30

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 4

PART B: T flip-flop using J-K flip flop

1. Connect a circuit as shown in Figure 2.
2. Repeat procedure Part A and record your result in Table 3.

+ 5v

3 4 5
J set Q

1 6
IC 1 Q

2 clr
K

15

SW1 R2 R1 IC 1 : 74112
- 5v + 5v LED 1 R1,R2 : 300 Ω
LED 2 Vcc = pin 16
Gnd = pin 8

Figure 2

PART C: D flip-flop using J-K flip flop

1. Connect a circuit as shown in Figure 3.
2. Repeat procedure Part A and record your result in Table 4.

+ 5v

3 4 5
J set Q

IC 2 1 6
SW1 IC 1 Q
- 5v + 5v
2 clr
K

15

R2 R1
LED 1
LED 2 IC 1 : 74112
IC 2: 7404
R1,R2 : 300 Ω

Figure 3

31

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 4

Result : Table 1

INPUT OUTPUT

Asynchronous Synchronous

Preset/set Clr J K Ck Q Q MODE

1100

1101

1100

1110

1100

1101

1100

1110

1100

1111

1111

1111

1111

Asynchronous INPUT Table 2 OUTPUT (8 marks)
Preset/set Clr Synchronous Ck Q Q MODE
(4marks)
01 JK (4 marks)
01 00 (4 marks)
01 01
01 10
11

Table 3

INPUT OUTPUT

T J K Ck Q Q MODE

0

1

Table 4

INPUT OUTPUT

D J K Ck Q Q MODE

0

1

32

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 4

Discussion :
__________________________________________________________________________________
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__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)
Conclusion :
__________________________________________________________________________________
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__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

33

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 4

Attachment/ Reference :
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

34

35

EXPERIMENT NO. :___________________________________________DUE DATE : ________________
EXPERIMENT TITLE : _________________________________________ GROUP : ________________
LECTURER’S NAME : _____________________________________________________

_____________________________________________________

NO REG. NO. STUDENT NAME SECTION
1
2

PRACTICAL OBSERVATION LAB REPORT

CRITERIA Marks CRITERIA Marks
(70%) (30%)
Submit
Attitude /Punctuality (5%)
(5%)
Neat
Teamwork (5%)
(5%)
Theory Preparation/
Tools Preparation/ Question
cleanliness (5%)
(5%) Discussions
Skills (5%)
(15%) Conclusion
Circuit Installation (5%)
(20%)
Results / Attachment/ Reference
Data collection (5%)
(20%)

TOTAL TOTAL
(to be filled after each session)
(to be filled by during each session)

TOTAL
MARKS

Prepared by: Checked by: Verified by:
Name: Name: Name:

36

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 5

TITLE : COUNTERS

AIM : Apply the principles of asynchronous counter design.

Apply the principles of synchronous counter design

Design Asynchronous Counter and Synchronous Counter.

EQUIPMENT : a. 5V DC Power Supply / 9V Battery

b. IC 74112 x 2, 7400 x 1, 7408 x 1 and 555 timer x 1

c. Resistor 300 ohm x 5, 2.7k x 1 and 82k x 1

d. LED x 5

e. Capacitor 47uF, 0.1uf

PROCEDURE :

PART A: Asynchronous counter Up

+ 5v Vcc = pin 16
Gnd = pin 8
2.7k
82k 84 4 10
SW1 3
7 3 set Q 5 11 set Q 9
6 IC J J
2 555
300 1 IC 300 13 IC 300
47uF 5 LED
74112 74112
1
2K 12 K
0.1uF clr clr

15 14

LED 1 LED 2

Figure 1
1. Connect a circuit as shown in figure 1
2. Before you switch ON the circuit, let’s your supervisor check it’s first.
3. Then switch ON the power supply.

37

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 5

Touch once switch SW1 to trigger the clock ( Cp ) at pin 1 555 timer.
4.
5. Observe the LED’s and record the result in table 1. LED ON = 1, LED OFF = 0.
PART B: Asynchronous counters Mode 6

+ 5v 82k 4 4 10 4
3
2.7k 8 3 set Q 5 11 set Q 9 3 set Q 5
7 J J J
SW1
6 IC 5 1 IC 13 IC 1 IC

555 74112 300 74112 300 74112 300

2 2K 12 K 2K
300 clr clr clr
1 14 15
15
47uF 0.1uF
LED LED 1 LED 2 LED 3

IC 14112
Vcc = pin 16
Gnd = pin 8

Figure 2
1. Connect a circuit as shown in Figure 2
2. Before you switch ON the circuit, let’s your supervisor check it’s first.
3. Then switch ON the power supply.
4. Touches once switch SW1 to trigger the clock (Cp).
5. Observe the LED’s and record the result in table 2.( LED ON = 1, LED OFF = 0).
6. Please attach a circuit photo for Figure 2.

38

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS
PRACTICAL WORK 5

PART C: Synchronous counters

1. Connect a circuit as shown in Figure 3
2. Before you switch ON the circuit, let’s your supervisor check it’s first.
3. Then switch ON the power supply.
4. Touches once switch SW1 to trigger the clock (Cp).
5. Observe the LED’s and record the result in Table 3.( LED ON = 1, LED OFF = 0)
6. Please attach a circuit photo for Figure 3.

+ 5v 82k 4 4 10 9 4 5
3 3 J set Q 5 11 J set Q 3 J set Q
2.7k 8
7 13 IC 1 IC
SW1
6 IC 5 1 IC 74112 74112

555 74112 300 12 K 300 2 K clr Q 300
clr 15 LED 3
2 2K
300 clr 14
1
15
47uF 0.1uF
LED LED 1 LED 2 + 5v
+ 5v + 5v

Figure 3
39

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 5

QUESTION: (5 marks)
1. Draw the state diagram from Table 1, Table 2 and Table 3. (4 marks)

RESULT LED 2 Table 1 Decimal value
OUTPUT
INPUT LED 1
Clock Pulse
1
2
3
4
5
6
7
8

40

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 5

Table 2

INPUT OUTPUT
Clock Pulse
1 LED 3 LED 2 LED 1 Decimal value
2
3
4
5
6
7
8
9
10
11
12

(8 marks)

41

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 5

Table 3

INPUT OUTPUT
Clock Pulse
1 LED 3 LED 2 LED 1 Decimal value
2
3
4
5
6
7
8
9
10

(8 marks)

Discussion : ( 5 marks)
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

42

DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 5

Conclusion :
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

Attachment/ Reference :

__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________
__________________________________________________________________________________

( 5 marks)

43

44

EXPERIMENT NO. :___________________________________________DUE DATE : ________________
EXPERIMENT TITLE : _________________________________________ GROUP : ________________
LECTURER’S NAME : _____________________________________________________

_____________________________________________________

NO REG. NO. STUDENT NAME SECTION
1
2

PRACTICAL OBSERVATION LAB REPORT

CRITERIA Marks CRITERIA Marks
(70%) (30%)
Submit
Attitude /Punctuality (5%)
(5%)
Neat
Teamwork (5%)
(5%)
Theory Preparation/
Tools Preparation/ Question
cleanliness (5%)
(5%) Discussions
Skills (5%)
(15%) Conclusion
Circuit Installation (5%)
(20%)
Results / Attachment/ Reference
Data collection (5%)
(20%)

TOTAL TOTAL
(to be filled after each session)
(to be filled by during each session)

TOTAL
MARKS

Prepared by: Checked by: Verified by:
Name: Name: Name:

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DEPARTMENT OF ELECTRICAL ENGINEERING
DEE 2034 – DIGITAL ELECTRONICS

PRACTICAL WORK 6

TITLE : SHIFT REGISTER

AIM : Apply the shift registers as arithmetic circuits and counters.

EQUIPMENT : a. 5V DC Power Supply / 9V Battery

b. IC 74LS74 x 2, 555 timer x 1

c. Resistor 300 ohm x 5, 2.7k x 1 and 82k x 1

d. LED x 5

e. Capacitor 47uF, 0.1uf

Datasheet IC 74LS74 /SN74HC74

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