DIY Curve Tracer for Mosfet Matching

[patrik96]

A DIY Component Curve Tracing system with DUT-matching function and plotting.

Not only can it make the I-V curve, but also auto-algorithm-based characteristic matching.
By this, people can easily manage transistors in the basis of batch,
and the system shows you the best-matched pairs and tells you the amount of mismatch, superb!

This is similar to another tracer I introduced earlier, so I love it a lot, another super helper for amateur DIYers!
I am happy with my iTracers on hand, but also glad to seem another project like this!

I will attach the source latter (of course), as I am surprised it seems no one here talked about this?
Anyone knows the origin of this project and author?

Is someone build that project? (http://diy.ucborgmann.de/index.php/de/audio-messtechnik/kennlinienschreiber) If yes please so kind and help,
I was built but unfortuneately it not work, I cheked and the two DAC(MCP4725) has no output, the SDA SCL is fine but seems it is not access the DAC. The two DAC is working a same A0(?) it mean it work paralell, is it good?
Thanks

 

[tubekiddo]

Yes, I have and it works like a charm…

The MCP4725 is not supported in the fw as is on Uwe’s homepage. It is disabled in the source code and replaced by the modern 1655 DAC. I can compile you a version with 4725 but I won’t be sure it’ll work. Better to get a pair of 1655 much better resolution!

I will send you my project stuff…
I’ve rewritten the gui in Python as well.

 

[patrik96]

Dear Tubekiddo,
I have no word how I appricate your help!
I will order the 1655, and create PCB,
Thanks a lot

 

[tubekiddo]

Much appreciated…
For the 4725 Uwe uses an extra calibration routine in the fw which would need to be enabled together with calling different DAC routines, this would introduce some work before building new fw.