Electronics Soalan Measurement MySkills Akhir 2011[1]

2011

PERTANDINGAN MySkills

(ELEKTRONIK INDUSTRI)

SOALAN AMALI

PERINGKAT AKHIR

NAMA: ______________________________________

NO. KP: ______________________________________

JABATAN PEMBANGUNAN KEMAHIRAN KEMENTERIAN SUMBER MANUSIA

Project: Measurement Time Limit: 2 hours

1.0 REQUIREMENTS 1.1 In this project, you are required to carry out the measurements and required

adjustments of a given circuit – a basic Waveform Generator. 1.2 In order to carry out the required tasks, you may need to refer to the following

documentations:

• Circuit Schematic Diagram • PCB Layout Diagram • Component List

1.3 Unless otherwise stated, all waveforms and voltages are measured with reference

to ground (0V). 1.4 All waveforms recorded must include its amplitude and time scales. 2.0 BACKGROUND INFORMATION

The board consists of several basic circuits which connected together produces PWM waveforms. The test pins TP11 and TP12 show the PWM outputs. P3 header output provides the product of the two waveforms.

3.0 CIRCUIT DESCRIPTION 3.1 The overall circuit diagram in shown Figure 1. 3.2 The DC Power supply can be varied up to 60V by adjusting the VR1. 3.3 The waveform generated by the sine wave generator is inverted by the IC U7A and

appears at the output OUT1/1 (TP8). The frequency of the waveform can be adjusted by changing the variable resistor, VR4. The variable resistor, VR5, is used to vary its amplitude and VR6 for adjusting the offset level.

3.4 The frequency and the amplitude of the square wave output at TP2 can be varied

by adjusting VR3 and VR4 respectively. 3.5 The frequency and the amplitude of the triangle waveform can be varied by

adjusting VR7 and VR9 respectively. 4.0 TEST EQUIPMENT REQUIRMENTS

• Dual DC Power Supply 1 set • Digital Oscilloscope 1 set • Desktop link to Oscilloscope 1 set • Assortment of connecting cables 1 set

5.0 INSTRUCTIONS TO THE COMPETITOR Carry out the required adjustments and measurements. All measurements and results SHOULD be measured using the oscilloscope. The results must be saved in the mass storage media provided. All files should be saved inside a desktop folder named PKM_MEASUREMENT. 5.1 Check and connect the +12V DC power supply to the circuit. 5.2 Adjust VR1 so that the DC voltage output at TP1 = +30V. Measure and save the

waveform under a filename Q5_2. 5.3 Adjust VR2 so that the DC voltage output at pin 3 of the P2 header = -12V. Measure

and save the waveform under a filename Q5_3.

P2

Pin 1

Pin 2

5.4 Adjust VR3 and VR4 to ensure a square wave at TP2, having the following properties: Frequency = 100Hz

Ttotal = t1 + t2 t1 = 60% of Ttotal t2 = 40% of Ttotal Measure and save the waveform under a filename Q5_4. 5.5 Adjust the variable resistors VR3, VR4, VR5 and VR6 to get a smooth sine wave of 100Hz

and 5Vp-p. Measure and save the waveform at TP4 under a filename Q5_5. 5.6 Adjust the VR7 and VR8 so that the waveform at TP5 is 1 KHz and having 50% duty

cycle (duration t1 = t2). Measure and save the waveform at TP5 under a filename Q5_6.

5.7 Adjust VR9 to get 1 kHz, 6Vp-p waveform at TP7. Measure and save the waveform

under a filename Q5_7. 5.8 Measure the output waveform at test point TP8. Save the waveform under a filename

Q5_8. 5.9 Measure the output waveforms at test point TP9 (channel 1) and test point TP10

(channel-2). Save the waveform under a filename Q5_9. 5.10 Measure the output waveforms at TP11 (channel 1) and TP12 (channel-2 ). Save the

waveform under a filename Q5_10. 5.11 Observe the output waveform at pin 1 of the header P3, by using pin 2 as the

reference point. Save the waveform under a filename Q5_11. P3

Pin 3

Pin 1

Pin 2 (ref)

SCHEMATIC DIAGRAM: FIGURE 1

Schematic: DC Power Supply

SWC 1

SWE 2

TCAP 3GND4

-VIN5 VCC 6

IPK7

DRVC8U1

MC34063U

SWC 1

SWE 2

TCAP 3GND4

-VIN5 VCC 6

IPK7

DRVC8U2

MC34063U

12

P1

Header 2

123

P2

Header 3

VR25K

VR150K

R61K

R71K

R31K

R41K

L1

220mH

L2120mH

C5100uF/50V

C3100uF/100V

C1

100uF/25V

222C2

C4472

D1UF4007

D2UF4002

GND

GND GND GND

GND

GND

GND

+12V

VCC1

GND

GNDGND

-VCC

GND

GND

+12V

-VCCQ2TIP122

Q1TIP122

R1

0R1/1W

R2

0R1/1W

R50R1/1W

TP1

DC +12V INPUT

GND

VCC TP14

GND

TP13

+12V

C19104

C18104

C17

100uF/25V

C20100uF/25V

IN1

2

OUT 3

GND

U3 LM7805CT

Schematic: Sine Wave Output

VR450K

VR35K

VR5100K

R8

4K7

R10 51K

R11 0R1

R94K7

R1215K

R13240K

R1410K

C10474

C9104

+12V

SIN ADJ1

SIN OUT2

TRI. OUT3

(DUTY4

ADJ)5

V+6

FM BIAS7 FM SWEEP 8SQU. OUT 9TIMING 10V- 11SIN ADJ 12NC 13NC 14U4

XR8038

+12V

+12V

+12V

+12V

-VCC

-VCC

-VCC

-VCC

-VCC

+12V

-VCC

TP4

TP2

TP3

OUT1

GND

R15

10K

R17

10K

R164K7

8

1

4

3

2U5ATL082ACJG

84

75

6U5BTL082ACJG

GND

-VCC

+12V

VR6100K

+12V

-VCC

8

1

4

3

2U7ATL082ACJG

-VCC

+12V

R23

10K

R24

10K

GND

TP8

OUT1/1

C13104

+12V

-VCC

SINE WAVE

SQUARE WAVE

R10

R11

Schematic: Triangle output

2

311

411

U6ATL084CN

5

672

411

U6BTL084CN

810

9

3

411

U6CTL084CN

GND

+12V

-VCC

+12V

-VCC-VCC

+12V

GNDC11104

C12

104

R18100K

VR7

100K

VR9100K

VR8

100K

-VCCTP5TP6

TP7

OUT2+12V

-VCC

1K

R22

10K

R214K7

R20

10K

R19

10K

GND

+12V

SQUARE WAVE

TRIANGLE WAVE

Schematic: PWM Output

2

311

411

U8ALM324AN

5

672

411

U8BLM324AN

+12V

-VCC

-VCC

+12V

C14104

Q49013

Q39013

R28470R

R27470R

R26

10K

R25

10K

OUT1

OUT1/1

OU

T2VCC

VCCGND

GND

+12V

-VCC

TP9

TP10

TP12

TP11

GND

GND

+12V

CMP1

CMP2

CMP1

CMP2

R29330R

R30330R

VCC

VCC

12

P3

Header 2

C15104

C116104

+12V

GND GND

+12V

,.,

'

;

.

.,

,,

,.

+12VU9 TLP250

OUTPUT

U9 TLP250

PCB COMPONENT LAYOUT

PCB LAYOUT

Pertandingan Kemahiran Malaysia (PKM)

PARTS LIST

Item Parts name Parts value(Model) Qt’y Reference number

1 DC-to-DC Converter Control Circuit MC34063U 2 U1,U2

2 Three-Terminal Medium Current Positive Voltage Regulator

MC78M05BT 1 U3

3 Precision Waveform Generator XR8038 1 U4

4 JFET-Input Operational Amplifier TL082ACJG 2 U5,U7

5 JFET-Input Operational Amplifier TL084CN 1 U6

6 Transistor Inverter For Air Conditionor IGBT Gate Drive Power Mos Fet Gate Drive

TLP250 2 U9,U10

7 Quad Low-Power Operational Amplifier LM324AN 1 U8

8 Diode UF4007 1 D1

9 Diode UF4002 1 D2

10 Capacitor for Ceramic 222 1 C2



13 Capacitor for Ceramic 104 10 C9, C11, C12,C13,C14,C15, C16,C18, C19

14 Capacitor for Electric 100uF/25V 1 C1



17 Capacitor for Ceramic 100uF/25V 1 C17.C20

18 Resistor 0R1/1W 1 R1,R2,R5

19 Resistor 1KΩ, 0.25W, 1% 4 R3, R4, R6, R7

20 Resistor 4K7, 0.25W, 1% 4 R8, R9,R16.R21

21 Resistor 51KΩ, 0.25W, 1% 1 R11

22 Resistor 0R1, 0.25W,0.5% 1 R10

Pertandingan Kemahiran Malaysia (PKM)

23 Resistor 15KΩ, 0.25W, 1% 1 R12

24 Resistor 240KΩ, 0.25W, 1% 1 R13

25 Resistor 10KΩ, 0.25W, 1% 10 R14,R15,R17,R19, R20,R22,R23,R24,R25, R26

26 Resistor 100KΩ, 0.25W, 1% 1 R18

27 Resistor 330Ω, 0.25W, 1% 2 R29,R30

28 Resistor 470Ω, 0.25W, 1% 2 R27,R28

29 Potentiometer 50KΩ 1 VR1

30 Potentiometer 5KΩ 1 VR2

31 Potentiometer 5K Ω 1 VR3

32 Potentiometer 50K Ω 1 VR4

33 Potentiometer 100K Ω 5 VR5,VR6, VR7, VR8 ,VR9

34 Test Point Pin LC-2-G 16

TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12, TP13, TP14,

35 Inductor 220mH 1 L1

36 Inductor 120mH 1 L2

37 DIP Socket RIC-DIP-8 6 U1, U2,U5,U7,U9,10

38 DIP Socket RIC-DIP-14 3 U4,U6,U8

39 Connector Header 2 PIN 2 P1, P3

40 Connector Header 3 PIN 1 P2

41 Transistor TIP122 1 Q1,Q2

42 Transistor 9013 2 Q3,Q4

Electronics Soalan Measurement MySkills Akhir 2011[1]

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