Great start to the blog on stability in loops, but as you opening tags always say "
a blog for any one interested in electronics design". But mostly it is reviews and rants. Don't get me wrong I do like those but I feel there is more rants and reviews than design blogs.
Unfortunately when you get to some good meat it is very general. I would have like to see some basic calculations on the response and show a better explanation on why it is unstable. What is going on with the phase of the output and input? Maybe explain to some hobbyist that may not had much school on what is a pole and zero and how there can be multiple poles and zeros that affect the stability.
Just my 2 cents.
Here we go again, the standard 2 cent response because I get responses like this to almost every one of my videos!
I can't please even some of the people all of the time, everyone wants different things from the blog.
If I did the deeper theoretical blog you wanted, I'd get emails or comments complaining it was too technical, too long, or I didn't include this or that, etc etc. It is
impossible to please everyone.
Also, I have finite time and enthusiasm. In this case I wasn't even going to do a blog that Sat morning (I'm not supposed to do the blog on weekend, so says the wife), but I just thought it would be cool to share how I got the simulation to match the oscillation I was getting, using totally different parts. That usually doesn't happen, so I thought it interesting and I cobbled that video together quickly to please those who want more material! Of course, I'm sure it was useful to
some people, and that's good enough for me. I encouraged viewers to go learn more about loop response and polls/zeros if they found it interesting.
So please, everyone, no more complaining about what I
should have included in a blog, I know all too well what stuff I'm not including, and it really eats me up every time I do almost any blog at all. It's always a trade-off in terms of time, effort, and what I think of at the time of shooting. And I've learned with great difficulty to swallow my pride and just get "something" out there for the masses.
And I agree with Armandas and Janne, control theory is not easy to teach, especially at the simplistic level a lot of my viewers expect. If anyone thinks they can then I challenge them to go and do their own tutorial video and see just how much effort is involved, you might be in for quite a shock!
As for reviews and rants, well, most seem to
like the reviews, and I keep getting endless emails and comments for
more reviews!
The rants, well, people like those too and ask for more. And the benefit is they are easy and quick to shoot in the limited time I have available.
I realise the tutorials are very popular too, but they do take longer and more thought/care to produce.
As for the tag line "any one interested in electronics design". Well, there is more to electronics design than just circuit theory. Many people thank me for the reviews because they actually teach them about good product design.
What else can the tag line be? The blog is mix of electronics design, tutorials, some theory, rants, reviews, and various aspects of design and engineering. If it became 100% only electronics circuit theory I'd probably lose 90% of my audience!
Sorry I can't please everyone, that's just the way it is.
I wish everyone had an understanding of how much effort goes into producing a basic rant blog, let alone a detailed tutorial/theory blog or an in-depth review, all the while trying to maintain and build a diverse audience!
Dave.