Joule Thief 101

[Magluvin]

Mags, do you have a function generator? Does it produce square waves? Can you center the square wave about 0V so that there is a positive half and a negative half of the wave form? If not, surely you are aware that they exist and that they can produce these and other types of wave forms where the voltage might vary with time as it progresses through its cycle, i.e. 50% at +5V, and 50% at -5V for eg.?

Have you heard of an Arbitrary Wave Form Generator? Check it out. It can be programmed to generate almost any wave form imaginable, including the one MH posed in his question. It can be set up so that it is a single shot, exactly as in MH's question.

Now, if we pretend this generator is "ideal", i.e. it has zero output impedance, then this is precisely what MH is referring to in his question.

Any component is "ideal" when and if its impedance is zero. An ideal diode would not only have zero ON resistance, but it would require an infinitely small forward voltage to forward bias it. Any inductor is ideal when its series resistance is zero Ohms (we assume it has no capacitance when it is ideal).

Yes i am familiar with a function gen. I just have simple ones at the moment but they do it to their limits. Square, sine, pulse, triangle, pulse width, offset, phase shift, modulation, am/fm, etc. Yeah I know them

To say the ideal source has zero impedance, is that impedance a variable resistance in the real world? So we could also say that the zero impedance is like zero resistance, because it remains at zero. No?

If yes, then we cannot have a measurable voltage output as brad says. maybe it seems nitpicky, but if we have to think deep on this, then we are. Ok, its pretend. So I guess the whole ideal thing is not just dealing with supeconducting components, and many more factors are just eliminated for purpose of discussion. Like cemf, as you posed it, you dont seem to know what that is when considering the inductor. At least according to one of your posts to me. So is the cemf just eliminated for discussion in the pretend ideal world? Just wondering.

Like ideal inductors have zero capacitance, and Ideal caps have no inductance, which are further than impossible as compared to just eliminating resistance.

Where this all started I think is when someone brought up the cap to cap scheme. Then the ideal cap to cap thing. We wouldnt be here right now if we had just stuck to real world devices where things are understood as is. Ideal world just doesnt simplify things for me. It doesnt help me understand inductors better than just testing them with a very low resistance, then a medum and then a very high resistance, and then it is what it really is. But all the ideal, pretend as you put it, is just pretend to a point that one could go on questioning pretend things when the real stuff in on our benches.  But thats just me. I suppose.


Mags

[Magluvin]

Here is one more.  Miles certainly does get around!

Im actually a Fox fan.  if they didnt show what they do, we could easily be back in the movie '1984' already.

Mags

[Pirate88179]

Im actually a Fox fan.  if they dint show what they do, we could easily be back in the movie '1984' already.

Mags

I agree totally.

Bill

[Magluvin]

I agree totally.

Bill

Propaganda is a powerful thing. We just dont have enough counter propaganda to overcome the source propaganda. Not an ideal world, soo.

I talk to people about foods, organics, gmo, etc.  Many just say bahh. Your a nut.  Just read an article of a dairy farm in N Fl that sells natural milk. They were approached by the FDA and they told them that they cannot print the words 'natural skim milk' on their containers because they did not add 'artificial' vitamin D to it. So they either had to change the label to "artificial skim milk' or stop sales.      What???  So the farm dumps all the skim milk until it is possibly resolved, as they will not label their product as artificial. These are grass fed cows and no antibiotics or steroids.

There is definitely something very wrong going on in the food industry. At least there are still some that care about their products.

Mags

[Magluvin]

Propaganda is a powerful thing. We just dont have enough counter propaganda to overcome the source propaganda. Not an ideal world, soo.

I talk to people about foods, organics, gmo, etc.  Many just say bahh. Your a nut.  Just read an article of a dairy farm in N Fl that sells natural milk. They were approached by the FDA and they told them that they cannot print the words 'natural skim milk' on their containers because they did not add 'artificial' vitamin D to it. So they either had to change the label to "artificial skim milk' or stop sales.      What???  So the farm dumps all the skim milk until it is possibly resolved, as they will not label their product as artificial. These are grass fed cows and no antibiotics or steroids.

There is definitely something very wrong going on in the food industry. At least there are still some that care about their products.

Mags

Ive been doing the raw milk thing for 2 yrs. In the first 2 months, lower back pain, knee pain and arthritis symptoms in the hands, all went away at the same time.

A new guy at work says he is diagnosed lactose intolerant. Cant have it.  But then he said he drinks raw milk every day.    So, is it milk that is the problem for lactose intolerant people, or is it the modified shmacked up stuff sold in stores? Think.    I cannot drink any store bought milk as I will get constipated bad. But the raw is no problem for me.     Again, milk as in real natural milk is not the problem, its what they do to it that hurts us.

$10 a gal, 1 gal a week.  $1.42 a day for my health is worth it.

Mags