1:10 PM
Ha, I watch your students doing the lab, and then more realized why I have an inferior complexity when talking to the real EE pros. I need to first introduced my background, when I studied the EE diploma in a sort of community college to be trained as a technician repairing radios in a Philips radio manufacturing factory, or American semiconductor testing plants. In short we learned more practical things, and not emphasizedon theories.
So, as I often said, after the EE diploma, I still don't know the meaning of opAmp virtual ground. I also don't know the deeper meaning of positive and negative feedback. Also we almost only used the locally made cheap equipment for repairing radios and the more expensive equipment was always locked in the cabinets. (1) So my first surprise was seeing your students can actually hands on, touching the high class equipment which I think are for industrial grade R&D labs.
So, as I often said, after the EE diploma, I still don't know the meaning of opAmp virtual ground. You should remember that not too long ago, I mentioned that I was very grateful for the two YouTube guys D Jones and the other name I forgot, explaining the meaning of virtual ground. I never dreamed that I can "investigate" the deep practical virtual ground.
(2) The other things is about dressing code. I must first mention that in those days in my city, a large proportion of people are refugees. So when I looked back, I should be dressed as a refugee in college. I still remember that I only had two cheapy coats and two jumpers which I wore for the whole winter. So I was so surprised to see your students/tutors dressed so smartly and fashionable in the lab.
Of course many years later our community collage upgraded a polytechnic and had business and even fashion design departments. Well, I am not complaining, because in those years only less than 3% of those eligible to enter a university, and perhaps 5% could go to a technical college. So fast forward decades, you should see why now I am so keen to make a (tunnel) diode oscillator, playing with opamps and ADC/DAC etc.
It is sort of a healing process, or repairing of my broken dream of not being able to go to America to study EE in a University. HongKong EE/ME industries did not go well after my graduation and technician years. Luckily I had other chances to study IT and software engineering and can still earn a decent living. Now the time has come to show off my software engineering knowledge and skills.
For the MCP4725 12-bit ADC, I am using high class programming techniques call "Data Driven Programming" style to power the tunnel diode to hopefully force it to enter the Negative Dynamic Resistance region.
Just thinking aloud, sorry for all the typo errors. Almost bed time, see you tomorrow. Cheers.