Thank you once again for your excellent vidoes. I'm a 58-year-old "math major" who programs computers for a living, but dabbles in electronics. Your videos are exactly on the right level for me, and I like your style.
We never did Smith charts at school but now thanks to you they are starting to make more sense. My only comment is that at 2:18 you say: "Its easier for low frequencies to go through the capacitor", I think you meant to say "Its easier for high frequencies to go through the capacitor". Thanks again for the Video.
Also, I have to say that the 2π converts the frequency, f from the unit of Hertz (cycle/s) to the "unitless" unit of radians/sec. The 2π being of the unitless unit of radians/cycle.
well radians are a unit, and seconds are a unit. so radians/second are certainly units. The 2pi part does come in handy with all those sines and cosines repeating themselves every 360 degrees.
Really like your videos. I'm an old fart myself and play around with inductors, capacitors and VNAs. I usually am trying to incorporate microcontrollers into my designs to automate adjustments so.... more videos with micros ??? Anyhow... keep up the work - we all seem to like it :)
For all you mechanical engineers out there (like me!) who like to dabble in electronics: The Smith Chart is the "Mohr's Circle" of electronics. What do you think?
You were great until the very last equation when you used capital "I" to represent impedance; that might confuse someone (I could hear the gears turning in your head as you said that and was surprised when you used it!).
Yes I should have used Z but I really believe the problem with teaching is that people get hung up on just memorizing things instead of the fundamentals. And if you see a random Z there is no way to tell what it stands for. and why j when there is already an i. Just wait for my big lecture on gamma and what the smith chart really is. I will loose 99% of my audience
@@IMSAIGuy Hmm, not so sure about discarding E since it has historically (at least in EE) stood for electromotive force (emf). E and V are often (perhaps mistakenly) used interchangeably when talking about voltage if the discussion relates to ordinary electronic circuits. In ham radio you probably won't get dinged for exchanging E=IR and V=IR. Think that E should be used when the discussion is about fields, ie motors, generators, antennas, transformers etc. for example when thinking about back-emf.
@@PapasDino Right, E is electromotive force measured in Volts, I is current measured in Amperes, R (or Z) resistance or impedance measured in ohms, and of course as noted X is reactance also measured in ohms.
Thank you once again for your excellent vidoes. I'm a 58-year-old "math major" who programs computers for a living, but dabbles in electronics. Your videos are exactly on the right level for me, and I like your style.
We never did Smith charts at school but now thanks to you they are starting to make more sense.
My only comment is that at 2:18 you say: "Its easier for low frequencies to go through the capacitor", I think you meant to say "Its easier for high frequencies to go through the capacitor".
Thanks again for the Video.
I thought so too....
Nice and simple way to introduce a complex topic, good effort. That's the cornerstone of a great teacher, even if you never teached.
crystal clear and awesome presentation, I love those maths behind impedance, reactance and smith charts 😀
Thank you for a very imformative video. I always wondered what the Smith Chart was, and your explanation was very clear and understandable.
Sir, this is most easy to understand and usefull video about Smith chart on YT. Please continue. Your videos are great!
Thank you
Thanks a lot! Looking forward to see next one about the Smith chart :)
You've made it so easy to understand..Thank you.
Never got it told like this, please keep going that way.
Very instructable.
Nice introduction! Thank you!
gorgeous VNA you build with that 8711... great!
Excellent explanation! Please make a video on Smith Charts, Thank you very much.
Nice video of understanding a smith chart and a nanovna
I was just trying to find info on this and you posted the video.
I agree, write a book, you are a such great lecturer. It wolud be a second book of you, just after "The memories of the high-tech corpos' engineer" :)
Possible stupid question. Can a VNA be used to check capacitors and inductors? I have some capacitors to check...
you can check the capacitance value at a frequency.
Also, I have to say that the 2π converts the frequency, f from the unit of Hertz (cycle/s) to the "unitless" unit of radians/sec. The 2π being of the unitless unit of radians/cycle.
well radians are a unit, and seconds are a unit. so radians/second are certainly units. The 2pi part does come in handy with all those sines and cosines repeating themselves every 360 degrees.
since 1 Hz = 2pi radians/second. the units conversion is just cycles/sec to radians/second. sometimes called angular frequency (omega)
Really like your videos. I'm an old fart myself and play around with inductors, capacitors and VNAs. I usually am trying to incorporate microcontrollers into my designs to automate adjustments so.... more videos with micros ??? Anyhow... keep up the work - we all seem to like it :)
I have 900 videos, go look at the old ones. lotas of micros
Where were you when i was in school? Great video!
Just wondering hp 8711 how many sweep points it can do? 401?
1600
More smith chart stuff please.
Sir what a kind of machine is that?
That is a Vector Network Analyzer
@@IMSAIGuy oh ok thank you
For all you mechanical engineers out there (like me!) who like to dabble in electronics: The Smith Chart is the "Mohr's Circle" of electronics. What do you think?
lots of circles floating about, optics folks can one up you with Poincaré spheres
U and lasersaber sound the exact same.
You were great until the very last equation when you used capital "I" to represent impedance; that might confuse someone (I could hear the gears turning in your head as you said that and was surprised when you used it!).
Yes I should have used Z but I really believe the problem with teaching is that people get hung up on just memorizing things instead of the fundamentals. And if you see a random Z there is no way to tell what it stands for. and why j when there is already an i. Just wait for my big lecture on gamma and what the smith chart really is. I will loose 99% of my audience
@@IMSAIGuy So the current (C) is equal to E/I ? . . . ;-)
I think you are confusing E and V. E is for energy, or power of 10 exponent, can't remember, vitamin E maybe 😎
@@IMSAIGuy Hmm, not so sure about discarding E since it has historically (at least in EE) stood for electromotive force (emf). E and V are often (perhaps mistakenly) used interchangeably when talking about voltage if the discussion relates to ordinary electronic circuits. In ham radio you probably won't get dinged for exchanging E=IR and V=IR. Think that E should be used when the discussion is about fields, ie motors, generators, antennas, transformers etc. for example when thinking about back-emf.
@@PapasDino Right, E is electromotive force measured in Volts, I is current measured in Amperes, R (or Z) resistance or impedance measured in ohms, and of course as noted X is reactance also measured in ohms.