Joule Thief 101

[Magluvin]

Excellent vid on resonance. Covers the wine glass and sets in front of a speaker and does a stroboscope on the glass so you can see the glass oscillate. Very good vid

https://www.youtube.com/watch?v=S9gr4w_U9Qs

Mags

[Magluvin]

In this vid, what you read when it starts is something we should keep in mind.

https://www.youtube.com/watch?v=wvJAgrUBF4w

Mags

sorry  just put in the yt link as I had forgot

[Pirate88179]

I really enjoy Dr. Lewin's videos.  I had not seen this one so, thanks.

Bill

[Magluvin]

I really enjoy Dr. Lewin's videos.  I had not seen this one so, thanks.

Bill

Welcome. Me Either on that one.  Funny, when you search the word resonance on YT, there are all these animation/anime things with some vids like that. So I refined the search and got those 2.

Gotta go home n sleep tonight. Played a little with the jt to recreate something I had seen earlier and been thinking about n take a couple scope shots to show...

When the resistor is at 33ohm, there is some good pull down of the battery with 1 shorted winding, not killin it too fast but anyway... when its at that point, the blue trace is across the battery to monitor it. When the transistor switches on, the batt is flat line with ever so slight downward trend till the transistor releases and the winding discharges into the led, led across coil not transistor.  Look at the battery when the transistor is off. The batt oscillates. Its not across any coils other than through the (off) transistor. Now if the windings were somehow producing that oscillation across the batt while the coil is discharging through the led, we would most likely see that in the led (on) trace. The oscillation is 1.273mhz.  So if it is the battery oscillating, then maybe that freq is what we should aim for with the rest of the circuit, or a lower multiple, etc, because if we can have 'all' components in sync, that would be what Smoky was saying that the whole shmine glass resonates.

Just thinkin.

Mags

[tinman]

Your answer about the resonant frequency is off by a country mile, and your sentence was nonsensical.  It was just like saying that the mechanism of resonance in a wine glass is when you hit it at its resonant frequency and it starts to resonate.  The model of the speed governor for an ICE has no relation at all with how the wine glass resonant frequency is determined.

Instead of plowing ahead like a steaming bull that's snorting fire and insisting that you are right, why not just spend some time learning about resonance?  You may indeed have a "Eureka!" moment, you never know.  Or someone else will answer the two questions.  This is supposed to be a challenge to encourage you to learn and apply your knowledge, not an insane Mad Max battle in the desert.

P.S.:  I spelt it as "biatch" intentionally.

Your continual insistance of everyone being wrong, while you have provided nothing in the way of answers, is now considered as nothing but unfounded babble.

As you offer no counter argument, that is backed up with proof, you are seen to be no better than those that also try to peddle free energy devices for self gain.

You are a phoney MH--thats all you are, and not worthy of anymore of my time.
You provide endless talk, but you never back up your own claims.

Brad.