Joule Thief 101

[tinman]

Tinman, I agree the approaching magnet will give rise, but only to the peak of the positive, at TDC that positive peak then reverses instantly to negative peak ,and as the magnet leaves the negative peak rises back to the zero line.??
Why would the decline of the + peak and the propagation of the negative peak take twice as long when only at TDC?
The only way I can see your sine wave is if the core of the coil is twice as wide as the magnet. This would give time for decline of the positive and the rise of the negative.
Not trying to start an argument  just trying to understand.
artv

Shylo

Here is the first video. The second will be a motorized version,with a timing trace on the scope,along with a strobe on the rotor.
But for now,this is the best i could get it--hope it helps.

https://www.youtube.com/watch?v=P7F3JWdsllc

Brad

[MileHigh]

Whoops! The scope trace travels from left to right on the display and the rotor is rotating clockwise so Brad got the colours backwards.  However, he copied my marked-up diagram and corrected himself after two tries and got it nearly 100% correct.  Nary a peep about his mistakes though.

Me: "The arrow was circled to remind you that the disk is rotating"

You clearly state Timing diagram,where the orange circle indicates the timing of the magnet.

That's a ridiculous thing to say, you are shamelessly lying.

You done the big face plant this time,and now you are trying your back peddle tactic's, but it's all there for everyone to see. lol

Your face is melting like wax while Brainfry's mind experiences thermal runaway.  I can see the smoke rising from your head as we speak.  You can't even admit that your fist two diagrams were wrong, even though you then turned around on a dime and did an exact copy of the diagram that I marked up.  You are morally bankrupt and a joke.

i drew it for you,and you scribbled some rubbish on it.

Your brain is glowing now like hot coals.

MileHigh

[MileHigh]

In Other Words:  Rap the glass and it twangs at its natural
resonant frequency.  If that tone isn't satisfactory, partially
fill the glass with wine and rap it again.

Repeat as necessary.

Drink the wine following each trial.

Whoops, in my haste in my original reply I thought that I was responding to Brad.

Shame on you for your trash talk Mr. Sailor.  My answers to the two questions are a serious little mini technical treatise.  Nobody got it, nobody could make a succinct answer that was correct and truly answered the questions properly and identified the two energy storage components and two variables associated with a resonating wine glass..  And you can interpret what the implications of that are for yourself.

[shylo]

Hope I get you before, Get rid of the stopper block and let it rotate. Stopping the magnet like that changes everything.
I think that you have to bounce it back and forth.
Thanks for the video , To me it shows only a quarter of the wave?
artv

[MileHigh]

No
that was just the first Part [It Must be??}

Miles will Now "strut around like A primordial Peacock" and if he can keep from Dragging his Knuckles on the sidewalk ...  he will  show how this "BIG REVEAL " will drastically alter Brads MO for working with resonance .

or the 100 other methods shared here "PRIOR" to this "BIG REVEAL"....

Miles please tell Us that wasn't the "Money Shot".......



Truly the Point of your "Big Reveal" was to teach something worthy of all this Drama ??
a goal beyond semantics ??

a Bold New Path .....the Honing of the Tool .....?

Bigger... better....stronger ??

Please ??

Chet, the question was serious and the answer was serious.  Nobody got it, so you think about that.  Yes, the drama is crazy and seeing people break down and compromise their integrity to the extreme is not something that I find fun, but it is what it is.  It's actually somewhat shocking.  Some people have claustrophobia and if they are put in tight spaces then they go completely nuts, and other people go nuts for different reasons.  Don't buy used cars from some of the people around here.