Joule Thief

[jeanna]

@All
Here is another CRO movie, it's the 3rd one I have done today of my EB output, the waveforms have changed further again slightly.
This time I have altered the image somewhat to show the Triangle waveform which we have seen on Jeannas scope on Bills Stubblefield Earth Battery Forum.
I then return my scope settings back to their original settings.

jim

Excellent Jim,

I like the progression of these videos.

My scope's sampling limit is 5Mhz but it can only show around 2MHz.
I can see a lot of the jumping around.
If I set it so it is reading in the millivolts arena, I can see a wave close enough to stop it and measure it.

In fact, it moves way too fast to see, much faster than your video. I suspect it is the resolution of mine being more limited. I must stop it by putting it on hold to be able to measure the wave and see that it is 2.2MHz.

It looks a lot like the second one where it flips and the up curves become down curves.

For our information, what is the time between 2 waves on that squiggle at the most regular points?

Thank you,

jeanna

[jeanna]

Yeah several pages back I posted that I had added a rheostat to control the pickup coil. It works well.  its how I tune my charger

Take Care,

-Altrez

Altrez,

When you say you put the rheostat across the pickup wires do you mean one leg of the rheostat on each of the pickup wires?

jeanna

[electricme]

@Bill,
Thankyou for the inquiry.

Jim:

What did you change to make that waveform look more like Jeanna's?  Are you seeing the same general range of Hz she was seeing?  After a little more testing with my scope so I get to know it a little better, I will drag it outside and see what mine looks like.  I wonder if all of them will be a little different?  Or, will the frequency of all of ours be similar?  Very good work Jim, thank you.

Bill

To display the waveform like you see with Jeanna's scope shot, I just backed off the VOLTS/DIV and the TIME/DIV switches.

I hooked my probe earth clip to the earth lead (aluminium rod) and the Probe itself to the (Copper Pipe)

In your case, the earth clip to the Magnesium bar, the cro probe to the Carbon rods.

Then just fiddle a bit with the cro settings, don't forget to take a towl to put over your head to cut the sunlight/glair out or you wont see the screen.

You will have to run an extension lead for the Cro's power I think.

I think you will see similar waveforms, but take notice how they change all by themselves, I mean they have wobbily bits, going up and down, tremmers, and spikes all mixed up in the waveforms.

Take my advice, and run a special lead from your electrodes in the ground and meassure it from inside the house, it makes it sooooo much easier.
You can keep records when it is Dark, Daytime, Raining, Snow, all in comfort.

jim

0837.jpg = 1st waveform taken today
0838.jpg = 2nd waveform took 1/2hr later
0839.jpg = 3rd waveform took 2hrs later

0841.jpg = What does a 1 watt cree LED looklight? You need sunglasses and it needs a heat sink or it will kook up

[electricme]

@Jeanna,
Thankyou for the "Exelent", TA.
I will take a look at this in the morning for you,  its 12:44 in the morning here, my brain is addled, it's like thinking through treakle.

Excellent Jim,

I like the progression of these videos.

My scope's sampling limit is 5Mhz but it can only show around 2MHz.
I can see a lot of the jumping around.
If I set it so it is reading in the millivolts arena, I can see a wave close enough to stop it and measure it.

In fact, it moves way too fast to see, much faster than your video. I suspect it is the resolution of mine being more limited. I must stop it by putting it on hold to be able to measure the wave and see that it is 2.2MHz.

It looks a lot like the second one where it flips and the up curves become down curves.

For our information, what is the time between 2 waves on that squiggle at the most regular points?

Thank you,

jeanna

Thankyou Jeanna.

@Bill,
I think I should not take up any more space on the JT with my earth batt, but if it OK with you, I should post this on your N Stubblefield topic.
I posted this stuff here just to give some of the others an idea what is going on under their tootsies.

I'll talk to you about this 8 to 9 hours ohhh i'm wobbly in the head with tired ness.

hooroo all
jim

[altrez]

Altrez,

When you say you put the rheostat across the pickup wires do you mean one leg of the rheostat on each of the pickup wires?

jeanna

Yes that is it. If you watch the Spikes of voltage will go way up when you have it in tune.

-Altrez