12:42 AM
Do you mean your answer on Schmitt trigger? I skimmed your answer but found it too long for a morning read. Perhaps I can check it out later. I did not learn Schmitt trigger in my EE diploma, so I am interested to remedy it. So you see earlier I assembled a Schmitt trigger triangle wave gen and I will use it later for the tunnel diode experiment.
@Circuitfantasist Well, I did also once use Turbo Prolog in my IBM PC days. Actually the python program I am writing now uses some of the programming ideas, such as "declarative programming style (not procedural or OO), using predicate logic etc, .. In the deleted CD chat, I remember towards the end, I told you that I will use Occam's Razor style to answer my own question of the tunnel diode's missing NDR plot. You see I am still working on it. :)
BTW, I do thinkg Turbo Pascal good for small programming projects.

3 hours later…
3:21 AM
About the R1 R2 notation. If you goolge opAmp images, you whould find how many images are using Rf, Rg, and Rin, and how many using R1, R2. As I often say, you are chasing your audiences away, if they don't know your notation, and no diagrams along side to help to figure out, ...

3 hours later…
6:00 AM
"Rf" is misleading since it is not only the resistor constituting the feedback network; both resistors make it (they form a voltage divider driven from the side of the output). Maybe "Rout" is more correct...
I prefer to use "R1" for the input resistor (between the source and "-" input) and "R2" for the output resistor (between the op-amp output and "-" input). Of course, I always use drawings in my explanations but here it is not convenient.

2 hours later…
8:14 AM
I am discussing now another relatedgreat idea with my students - the so-called "sense amplifier"...

6 hours later…
2:07 PM
The matplotlib is very newbie friendly. I just spent 10 minutes skimming the beginners guide, read the demo program, and only made a couple to trials and errors and successfully drew the following Tunnel Diode 2SB4B I-V Curve, using the crude manual measurements I listed in my question.
Now I am coming back to v2.0 of the tunnel diode I-V curve plotting proposal. tunneldiode.blogspot.com/2020/12/…. As I said earlier, this v2.0 hardware will use (1) 12-bit current sensor, (2) 12-bit ADC. Both toys arrived this afternoon, just in time to start playing. :)

3 hours later…
4:48 PM
I think only Edison has worked so hard... well, me too:) Here's my new blog post and CD.