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DIY Curve Tracer for PC
DIY Curve Tracer for PC
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Old 10th July 2012, 12:41 PM   #251
locky_z is offline locky_z  China
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Join Date: Jun 2004
Location: XH
Their no polarity inverter circuit,
The PNP measure diagram is below
DIY Curve Tracer for PC-1-gif
If test PNP, System will set Eout to 36V,
And step down the Bout inorder to generate Ib.
System measure the Vrb,Vrc and calculate the Ic and Ib and Hfe.

The Vrb Vrc measure circuit is below
DIY Curve Tracer for PC-2-gif
It use a OP07 as follower, The op07 bias current and offset current will have some voltage drop on RB. But Op07 bias current and offset current less 5nA,and Op07 offset voltage is less 1mV,so OP07 only a little affect to DTU base current.
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Old 11th July 2012, 09:30 AM   #252
locky_z is offline locky_z  China
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Join Date: Jun 2004
Location: XH
Softwere update ,It can support script control.
Click the image to open in full size.

The script is

V0=2.5
mode i
setrc 0
Eout V0
startwatch
color=random(999999)
for i=2 to 10
setib i
notice "IB=",i
for j=0 to 72
cout j/2+V0
waitrelay
getadc 2
ic=1000*vrc/currentRc
ib=1000*vrb/currentrb
curvepoint str(i),vce,ic,ib,ve
next
endcurve str(i),color
cout v0
next
d=stopwatch()
notice "time:",d
end

The software link
http://www.diyaudio.com/forums/attac...871_script.zip
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Old 13th July 2012, 12:48 AM   #253
locky_z is offline locky_z  China
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Join Date: Jun 2004
Location: XH
software update 2012.7.13
Bug fix:
1.if use negative parameter in setIb ,It have error.
2.add initialization currentRB,currentRC variables when press ‘run' button.
http://www.diyaudio.com/forums/attac...871_script.zip
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Old 13th July 2012, 01:03 AM   #254
carpin is offline carpin  Netherlands
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Thanks locky_z for the update
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Old 13th July 2012, 07:47 AM   #255
Bksabath is offline Bksabath  United Kingdom
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Hi locky_Z

Maybe this has been posted before
IS there a manual for the calibration of the curve tracer?

And maybe, more important, a way to return the curve tracer to original calibration if things go wrong?
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Old 24th July 2012, 02:01 PM   #256
Stefanoo is offline Stefanoo  Italy
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Location: italia - ora USA -WI
Sorry to interject here.
I am wondering if a KIT for the USB Curve Tracer is avaialable for purchasing.

Thanks,
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Old 24th July 2012, 02:14 PM   #257
Lazybutt is offline Lazybutt  France
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Stefano,

See the link to eBay in Locky_Z signature

locky_z's Intelligent curve tracer | eBay
Intelligent curve tracer main board | eBay

Fred
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Old 24th July 2012, 02:36 PM   #258
Stefanoo is offline Stefanoo  Italy
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Location: italia - ora USA -WI
thank you so much.
I will buy one...probably the finished product.
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Old 27th July 2012, 08:00 AM   #259
locky_z is offline locky_z  China
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Location: XH
I wrote a component of the Tracer installation/ calibration/ diagnostic manual in chinese,
Who can help translate into English.
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File Type: zip CT3 Install manual.zip (463.6 KB, 72 views)
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Old 27th July 2012, 12:20 PM   #260
Bksabath is offline Bksabath  United Kingdom
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Quote:
Originally Posted by locky_z View Post
I wrote a component of the Tracer installation/ calibration/ diagnostic manual in chinese,
Who can help translate into English.
I more than happy to help with tidy up of this but not good enough to start from scratch.

Your English is not to bad and if you get started we can get there...
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