Joule Thief 101

[tinman]

 author=MileHigh link=topic=8341.msg480084#msg480084 date=1460249448]

Let's see if any of the resonance fetishists can answer the questions successfully.

How is the resonant frequency of a wine glass determined

The resonant frequency of a wine glass is determined by the shape,size,and structure of the glass.
We can find out what the resonant frequency is by vibrating the glass using sound waves and raising the frequency of those sound waves until the vibrations of the wine glass reach a maximum amplitude.

How does a wine glass resonate, what is the mechanism

It resonates due to the deformation and reformation  of the wine glass from it's rest shape,where the resonant frequency of this deformation and reformation is determined by the shape,size and structure of the wine glass. This causes pressure wave's that can be heard-->sound waves.

I wouldn't be surprised if there is a lot of moaning and groaning and shameless outright lying when it comes to the wine glass questions.  Or there will be more strutting little fake-ass peacocks flashing their phony colours and saying, "Oh, I already knew that."

Childish--as expected.

Brad

[MileHigh]

Wrong and wrong.

[tinman]

For any that are interested-->

If you wish to increase the capacity/remaining energy in your !nearly depleted! 1.5 volt batteries by up to 50% for use in your JT's,then simply squeeze them slightly in a vice-end from end,or place the negative end on a bench,and tap the positive end with a hammer a few times.
Do not tap that hard that it crushes the battery-light taps only needed-maybe 10.

P.S--make sure you insulate your vice jaws of course,so as not to short the battery.

Brad

[Magluvin]

For any that are interested-->

If you wish to increase the capacity/remaining energy in your !nearly depleted! 1.5 volt batteries for use in your JT's,then simply squeeze them slightly in a vice-end from end,or place the negative end on a bench,and tap the positive end with a hammer a few times.
Do not tap that hard that it crushes the battery-light taps only needed-maybe 10.

P.S--make sure you insulate your vice jaws of course,so as not to short the battery.

Brad

Lol Same here. If the remote for the tv stops working take out the batteries and bang them on a table or wood and it sometimes gets ya goin a bit. Not if they were sitting dead for a while. I suppose it is mixing up the electrolyte a bit, something physical.

Used to take c and d cells apart when I was a kid. And lol, sometimes if you try to put a d cell back together, the electrolyte filling around the carbon center rod, the batt would get real hot. Shorted it out some how. Was around the beginnings of learning electricity. But most likely like me, I bet most of us had very first electricity experiences at the ac outlets in our homes. None of the rebuilt batteries ever exploded. But did have smoke sometimes.. I imagine a high end nimh d cell that can put out a continuous 50A and peak 100A may be a problem if left in a shorted position after a full charge.

Mags

[Magluvin]

author=MileHigh link=topic=8341.msg480084#msg480084 date=1460249448]




The resonant frequency of a wine glass is determined by the shape,size,and structure of the glass.
We can find out what the resonant frequency is by vibrating the glass using sound waves and raising the frequency of those sound waves until the vibrations of the wine glass reach a maximum amplitude.

It resonates due to the deformation and reformation  of the wine glass from it's rest shape,where the resonant frequency of this deformation and reformation is determined by the shape,size and structure of the wine glass. This causes pressure wave's that can be heard-->sound waves.

Childish--as expected.

Brad

Yup. Say we ping the wine glass on the side, that impact on the side of the glass creates an initial wave around both sides of the glass that peak on the other side of the glass and the wave travels back to the other side of the glass where it was impacted. If the wave were more dispersed, as in an off freq of the glass resonant freq then the ring, oscillation would not continue. And the liquid called glass is quite flexible at resonant freq as compared to trying to reshape it as in the glass breaking vids with a vice or a clamp. Thats for sure.

Mags