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locky_z 30th April 2006 08:10 AM

Computer semiconductor characteristic curve Project
2 Attachment(s)
I'm doing My Project is "Computer semiconductor characteristic curve" (My english is bad.So Just Show the test result.)

My project link(China) is

This instrument can test MOSFET / JFET / transistor / diode / SCR / resistance....
Can Show
Ic->Hfe curve
Vbe(Vgs)->Ic(Id) curve
Vce(Vds)->Ic(Id) curve

The VCE measure range from 0 to 36V
The IC measure range from 2mA to 3A

this 11's 2SK216 Vgs->Id curve

Netlist 30th April 2006 11:09 AM

Looks very nice. I only we could find someone to translate.
I presume the device is somehow connected to the PC via USB?


locky_z 3rd May 2006 07:38 AM

2 Attachment(s)
I use LPT port to connect PC
The component just use below
TDA2030 x3
LTC1090/LTC1290 x 1
M62359 x1
CD4050 x1
74HC595 x1
TL431 x 1
78L05 x1
7812 x1
and some other general component

the pict is two matching 2SA733 Ic->Hfe curve

jacco vermeulen 3rd May 2006 09:13 AM


will you make the board layout and the programming file available so that we can build a curve tracer too ?
What does the collector/drain supply look like ?

locky_z 4th May 2006 05:17 AM

I use 3 Channel DAC to driver 3 x TDA2030 as B/C/E Channel Power Supply.

When Channel_C is output 38V,Channel_E is 2V,so VCE is +36V.
When Channel_C is output 2V,Channel_E is 38V,so VCE is -36V.
So we can test P or N type BJT/MOS/J-FET..... And only use single 40V power supply.

The circuit and PCB file as upper link.
But it is Chinese. and i don't know to translate to English.

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