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Show Us Your Curve Tracer

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Calvin:
Hi,

Having waited for years, I ordered my locky_z on ebay as soon as he offered the latest batch last year.
Unfortunately does it not work as I hoped for  :-//
It mostly draws just weird fuzzy lines on the display.
So I just put it aside since I had no time to dig into the issue deeper.
I heard though that another user had similar problems and got a replacement.
Unfortunately is locky_z  hard to contact and doesn´t respond very well (starting from not giving a rating on ebay to not responding on mails).
My old Tech 576 is a much more trustworthy guy in comparison.  ::)

regards
Calvin




Johnny10:
What about the B&K Model 501A ?

My first Curve Tracer.
Now where did I put it?

Remember also that all of the Tektronix and B&K models came with terrific manuals,

rsjsouza:
I am glad you liked the content, Electro Fan.

The kit is really good as the schematics and the microcontroller code are freely available. Also, one additional aspect is the ability to create your own scripts for testing, as well as save the data in tabular text form for post processing. I haven't done that yet, but it is quite promising.

I am having a blast with it.

rsjsouza:

--- Quote from: Calvin on March 06, 2021, 07:23:01 pm ---Having waited for years, I ordered my locky_z on ebay as soon as he offered the latest batch last year.
Unfortunately does it not work as I hoped for  :-//
It mostly draws just weird fuzzy lines on the display.

--- End quote ---
Calvin, I don't know what extent of testing you did but, depending on the set conditions, the DUT will only show really squiggly lines as it is not properly biased. I did that at the beginning and was really miffed at the results.

For example, the software by default sets the base resistor to 1M, which is quite high for most of the general purpose bipolar transistors. Also, if the collector resistor is too high, the Ic will be too low and therefore potentially cause the transistor to be simply in cutoff.

At any rate, I am sad to hear that you had a bad experience. His user's guide has a very thorough debug section, though. Yes, not an ideal solution but still some hope. Good luck!

Messtechniker:
My semi-finished  :) semiconductor curve tracer. Completed and verified D/A converter and USB link. Output stages need to be built one day.
More on this here:
https://www.dl4jal.de/kls/kls.html

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