We tend to believe believable stuff more...
I was reading a study on the HHO gas from a university today. HHO gas is not pure hydrogen and is usable for autos and welding and cutting torches as well.
See, here's the problem. You were reading it
just today and you
still aren't able to give us the name of the university, the writer or researcher, and a synopsis of the details contained in the document.
Masking having a lack of credible data by leveling recriminations is no help at all (and, unfortunately, tends to make you come across as "one of those conspiracy nuts").
It's like, Lipozene (the fat-burner pill advertised on TV). Why doesn't my doctor ever bother to mention Lipozene to me? After all they advertise that university studies (unspecified universities, of course) have found that it not only burns calories but, 70% of the callories burned are pure body fat. Why are people having their stomachs stapled and LAT band surgery when all they need is this powerful pill. It's certainly not being suppressed by the government. In fact, it's so unsuppressed that
you can't get away from their ads if you watch any late-nite TV at all. Sadly, there
IS a reason Lipozene is not prescribed by doctors. It's an herbal concoction that does nothing but sell
hope to the obese.
About the PWM. What you'll get here is sound (most of the time) info that works because it follows the laws of physics and electronics and, using those rules, practical PWM circuits are built and they work. Specific schematics with real component values are available (although the PWM function is usually performed inside a chip these days and is thun unavailable to you except as pinouts on an IC). It will help if you have a specific use for the PWM circuit as that will aid in zeroing in on the available control signals and needed output characteristics of the PWM.