Name | Modified | Members | |
|---|---|---|---|
 | 5/12/2018 9:23 am | 2 members | |
5/12/2018 10:29 am | 2 members | ||
 | 7/11/2018 11:32 am | 2 members | |
 | 17/10/2018 7:31 am | 2 members | |
 | 8/12/2018 1:31 pm by Mark Skoroszewski | 2 members | |
 | 30/11/2018 10:16 am | 2 members | |
 | 30/12/2018 12:08 pm | 2 members | |
 | 17/10/2018 7:28 am | 2 members | |
 | 14/10/2018 2:05 pm | 2 members | |
 | 14/7/2018 6:12 pm | 2 members | |
18/7/2018 7:24 pm | 2 members | ||
 | 17/10/2018 7:28 am | 2 members | |
2/2/2016 7:11 pm | 2 members | ||
 | 5/1/2019 11:43 am | 2 members | |
5/1/2019 11:53 am | 2 members | ||
4/1/2019 5:30 am | 2 members |
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A
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B
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C
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D
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G
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H
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J
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K
K
L
L
M
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N
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O
O
V1
12V
GND
U2
LM7809CT
LINE VREG
COMMON
VOLTAGE
1
2
3
C1
330nF
C2
100nF
GND
U3C
LM324N
10
9
11
4
8
U3D
LM324N
12
13
11
4
14
U3A
LM324N
3
2
11
4
1
U3B
LM324N
5
6
11
4
7
R3
10Ω
0.5%
R5
2KΩ
Key=F
W202
29.3 %
R6
10Ω
Key=G
W100
65 %
VCC
VCC
R7
20kΩ
0.5%
R8
20kΩ
0.5%
R9
20kΩ
0.5%
R10
10kΩ
0.5%
R11
10kΩ
0.5%
R12
10kΩ
R13
10kΩ
0.5%
R14
10kΩ
1%
R16
56Ω
1%
R17
56Ω
1%
R19
5KΩ
Key=A
W202
35.2 %
VCC
U4B
LM324N
5
6
11
4
7
VCC
XMM1
R20
10kΩ
1%
U4A
LM324N
3
2
11
4
1
VCC
R21
10kΩ
1%
U4D
LM324N
12
13
11
4
14
VCC
R22
10kΩ
1%
XMM2
VCC
VCC
R24
10kΩ
1%
R26
10kΩ
1%
R23
20KΩ
Key=C
W203
45 %
R27
2KΩ
Key=D
W202
50 %
U4C
LM324N
10
9
11
4
8
VCC
R4
10kΩ
1%
XMM3
R25
10kΩ
1%
XSC1
B
A
Ext Trig
+
+
_
_
+
_
R18
10Ω
Key=B
W100
43.3 %
VCC
V2
-12V
GND
GND
U1
LM7909CT
LINE VREG
COMMON
VOLTAGE
2
1
3
C3
330nF
C5
100nF
VEE
GND
VEE
VEE
VEE
VEE
VEE
VEE
VEE
VEE
VEE
GND
GND
XMM4
GND
R1
10Ω
1%
This Op Amp
is just a buffer
used to measure the
VB Voltage
This Op Amp
is just a buffer
used to measure the
VE Voltage
This Op Amp
is just a buffer
used to measure the
Current through the
1 Ohm Resistor
This Op Amp
is just a buffer
used to measure the
Voltage Prior to the VB Resistor
So that the current going through
it can be calculated
Inverting Amplifier
Gain = - R24 / R25
Inverting Amplifier
Gain =
- R26 / (R27 + R23)
Q1
2N5551
GND
GND
U14
LM7805CT
LINE VREG
COMMON
VOLTAGE
1
2
3
C4
330nF
C6
100nF
VCC_5v
VCC
GND
VEE
VCC
VEE
VCC
U12C
LM324N
10
9
11
4
8
U12B
LM324N
5
6
11
4
7
U12A
LM324N
3
2
11
4
1
Op Amp's U3C, U3D and U3A
Work together to calculate the
difference in voltage between the
Input of U3C and input of U3D.
The difference in Voltage is Outputed
at U3A.
This Op Amp
is just a buffer
to the output of U3A
TP1
TP1
Transistor
Under
Test
Take out the
Transistor and
H1, H2 to
measure the
Resistance
TP2
TP6
TP5
H1
1
H2
2
H3
3
Remove H3 & H4 to set
The restance so that the reference
voltage is correct
H4
4
H5
5
H6
6
TP4
TP3
Base Current
Check. This value needs
to be divided by R15
to get correct current value
Eg. 85mV / 10K = 8.5uA
Measure TP2 to TP4
LED1
R2
560Ω
1%
GND
The input voltage
at this Op Amp U3C
needs to be lower
the input at U3D
The input voltage
at this Op Amp U3D
needs to be higher
the input at U3C
These two pots
set the relationship
of gain between
the 100mV input and
the 1mA Emitter
current.
Remove H5 and H6
to check the Resistance
This Op Amp
Takes the input voltage from
the voltage divider and gain
adjustment from U12B and then
it adjusts the output of this op amp
until the voltage accross R15 is equaly
to that
GND
U5
LM7905CT
LINE VREG
COMMON
VOLTAGE
2
1
3
C7
330nF
C8
100nF
VEE_5v
NPN & PNP
VEE
Version
S1
Key = Space
S2
Key = Space
VCC_5v
VEE_5v
VEE_5v
VCC_5v
R15
20KΩ
Key=E
W203
60.7 %
TP7
TP8
To check the emmiter
resistance
remove the Transistor, H1 & H2
Then measure ohms
From TP3 to GND
Calculation Example:
0.6v at TP3
Ie = 1mA
Therefore Re Needs to be 600 ohms
measure TP3 to GND.
# Note
Record the value of
R3 on Assembly
With the reference
Transistor in place
Check their is 600mV
Dropped across the
emitter resistors
measure TP6 to GND
Then set your DMM
to Relitive and begin
Test other transistors
To mesure
the Vbe of the
transistor
probe
TP4 to TP6
Emiter Current Check
To do this.
Measure the Voltage from
TP6 to TP5.if it reads 10mv
this is equivalent to a emitter
current of 1mA
(For more accurate readings
subsitute the 10mV above
for the recorded value of R3.)
PR1
V
V: --
V(p-...
PR4
A
I: --
I(p-...
PR5
A
I: --
I(p-...
PR6
A
I: --
I(p-...
PR3
V
V: --
V(p-...
PR9
V
V: --
V(p-...
PR10
Ref1
V
V: --
V(p-...
Ref1
V
PR2
V
V: --
V(p-...
PR7
A
I: --
I(p-...
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