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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
11 Capacitor for Ceramic 472 1 C4
12 Capacitor for Ceramic 474 1 C10
13 Capacitor for Ceramic 104 10 C9, C11, C12,C13,C14,C15, C16,C18, C19
14 Capacitor for Electric 100uF/25V 1 C1
15 Capacitor for Electric 100uF/100V 1 C3
16 Capacitor for Electric 100uF/100V 1 C5
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