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CH-012 Transistor Curve Tracer Adapter for OSC
This board has to be used with analog or digital oscilloscope which can display the signal in x-y mode, it
is designed to has 2 ranges of Ib to bias 2 types of transistor , Small transistor / Power transistor and
requires dual power supply +15V and -15V, due to main of components are op-amp which need dual
supply to operate
Technical information.
-Require Power supply +15VDC/-15VDC (1A )
-Capable to check IV curve both NPN / PNP Power Transistor / Small Transistor
-8 step Ib 0uA,24uA,48uA,72uA,96uA,120uA,144uA,168uA for small transistor
-8 step Ib 0.0mA,0.32mA,0.64mA,0.96mA,1.28mA,1.6mA,1.92mA,2.24mA,
Vce = +10V for NPN and -10V for PNP
-Switching frequency 642Hz
-2 Jumper to select ranges of Ib and type of transistor { NPN / PNP }
-hole PCB for wiring to external 2 way switches to select ranges of ib and type of transistor
-Require 2 CH Analog or Digital Oscilloscope in x-y mode to connect both CH to this adapter board (
CH1 is X-Axis and CH2 is Y-Axis )
-PCB size 9.0cm x 10.0cm
How to setup
- Switch on OSC
- Connect X to CH1 of OSC and Y to CH2 of OSC
- Connect dual power supply to the board { don’t swop between +15V and -15V }
- Set time base of OSC to 500us to 1ms
- Volt per DIV of CH1 = 2V / DIV
- Volt per DIV of CH2 = 20-100mV / DIV
- Put jumper to be suitable with your transistor NPN/PNP , first start with small transistor
range .
- Put transistor on test DUT socket, please put correct pin E , C , B. Don’t swop
- Power on the IV curve tracer board
- If no graph or you see only a few IV curves, this means that ib are not enough. Change
jumper to select power transistor
Warning : Don’t select between NPN / PNP during transistor is on the test DUT. Transistor maybe
damaged.
Note : Please ignore RCA connector on PCB layout. We stopped to use this RCA connector since 2014.
So, No RCA connector in this kit.
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Diagram how to set-up
Example how to calculate hfe of transistor
1
2
3
4
5
6
+6.2V
100K
D
+15VDC
1N5234
100K
1N5234
1N4148
100K
1N4148
100K
D
100uF/35V
Small Transistor
GND
1N5234
1N4148
100K
1N5234
Power Transistor
1N4148
+6.2V
RY2/1
-6.2V
-15VDC
14
1N4148
8
10
13
NC
NC
NC
2
RST
GND
CLK
VCC
X?
1
Q1
Q2
Q3
Q4
Q5
Q6
Q7
7K5
7K5
DUT
PNP
1N4148
12
11
9
6
5
4
3
1K
1
2
3
4
NPN
1N4148
RY1/2
1K
E
B
C
E
7K5
Small Transistor
1N4148
7K5
7K5
1N4148
7
4024
C
C
Power Transistor
1N4148
RY2/2
-6.2V
1N4148
+15V
1N4148
1N4148
100nF
11
BD139
1nF
14
13
2
220K
TL074
1
TL074
2
390
390
B
Y
10
BD140
NPN
1N4148
470K
RY1/1
11
TL074
1N4148
1N4148
J2
2
1
4
8
1
J1
11
4
9
10
3
PNP
U?D
470K
560K
+15VDC
X
1
4
680K
B
+15VDC
4
U?C
12
U?B
6
7
100K
1N4148
220nF
-15V
4K7
5
RY1
TL074
11
100
RY2
1N4148
A
A
Title
Size
B
Date:
File:
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CH-012 Transistor Curve Tracer Adapter for OSC
Number
http://www.thaikits.com
13-Dec-2013
D:\CH-0121.DDB
Revision
1.00
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