Joule Thief

[xee2]

@ jeanna 


While you are doing your testing perhaps you could check the effect on frequency of putting a capacitor across the base resistor. Just put a 0.1 mF (or whatever you have) across the base resistor while doing some other test and see if the frequency goes up or down. I would expect the frequency to be decreased by the addition of the capacitor. But I have never tested this.

[Mk1]

@jenna

Well , i don't really agree , yes its a good test , but finding the sweet spot would have most likely mean that the freq would be about the same on every number of turns tested, since the purpose is to find the right amount of turns for better results.
Now we know the lower freq give more but how many turns is the best we don't know from your test.

There are many variables , battery voltage , the core , the jt turns , and the freq , the way i did it show how many turns are better for a given core, ex between my mk1 with 8 jt turns that actually got the same voltage with any base resistor value (so the voltage was the same at different freq )and the one with 4 turns got 25 volts more .

Mark

Dog812, told you diode bridge !

[jeanna]

Well , i don't really agree , yes its a good test , but finding the sweet spot would have most likely mean that the freq would be about the same on every number of turns tested

Ah, remember Mark, I am a scientist.- "Most likely" -doesn't work for me.
I need to find that out.
I don't enjoy driving things into the ground. I find it too boring to do exhaustive tests all the time, but I do need to experiment in an orderly way from time to time to be sure of what I am finding.

... since the purpose is to find the right amount of turns for better results.

Well, you know, I think the purpose is to find the best results for our purposes.
We all have the same general purpose, but we all have a different angle on it.

I think our purpose is to find the right amount of turns that will give us a high voltage along with a high frequency. And we all have ideas on doing that. We are working together adding to our understanding and ability to move forward and we can only do that when we understand what we have and what we are doing.

I personally appreciate everything everyone's work here.

Now we know the lower freq give more but how many turns is the best we don't know from your test.

True, but I wasn't asking that question yet.

What I am showing is that when the volts go up the frequency goes down and
when the volts go down the frequency goes up.
Yesterdays test showed that the base resistor value can change the frequency and therefore change the volts.
Today's test shows that the number of turns also changes the volts which in turn change the frequency.

Now,

There is something to work with here.

We need high volts and we also need high frequency.

No one in this last 100 years paid much attention to Tesla's discovery that frequency in some way is a substitute for amps. This is MY discovery that he made this discovery.
I am very interested in following up on this.

I got this lead directly from Tesla.
I have been looking for this lead since I first read George Trinkaus' book about 18 years ago.
I found what I needed with the greatest of ease 2 days ago. Basically I opened the pdf and went right to it. I must follow up on a thing as clearly guided by intuition as this was.

nuf said and.

thank you,

jeanna

[jeanna]

I just cant get any readings on my multimeter off the secondary wires... it just reads 0.0

Sometimes, I use the AC Volts on the dmm just to get an indication. This number is meaningless, but it does go up and down when it should.

Having the leds lighting will take the voltage reading down a lot more than they should, so remember to remove them when checking out the ac voltage.

So, for a quick check, this will help.

The thing I think you are trying to do is get more than 24 hours out of one battery charge. Is that right?

This is why it is important to get the base resistor value way up.

I think you told us, but please again, how many lights are you wanting in a H Hoop?
It really shouldn't matter because you will probably put them in parallel.

I am thinking if you can get the base resistance (=frequency) up to maybe 15K ohm and yet have enough voltage to run the set in parallel, the battery should run a looong time.
I thought the trouble with too high frequency might be blowing the lights.
But maybe it isn't.
Maybe it is just the voltage that blows them.

Since I am only now actually separating the 2 - frequency and volts, I never looked at this before. maybe It will be obvious soon.
Perhaps I ran the 30 leds from a lowish voltage jt secondary because I had a high frequency.

I lit 30 leds off two very different toroids not realizing this important distinction.

there is a picture of the 30 leds on from the MK1 which has over 30 volts. (maybe over 60 - I forget.)
The berry doesn't have high voltage (7 volts) , but it has pretty high frequency and it lit 29 leds in parallel for low amps use from the battery.

Wow, this is so interesting. And it is coming together.

thank you,

jeanna

[TheNOP]

what i was saying is it wouldnt work with any resistor above 68 ohm.. the next resistor value i have higher than 68 was a 100 ohm lieing around and it would not work in the base position. And every other resistor i tried above 68 Ohm's did not work.. 100, 180, 190, 1k, 2.2k....
Only my 47 and 68 ohm resistors worked...

Also.. i am lighting the 3 LED 's off the secondary.. .. they light up very bright.. but only for about 24 hours.. if that matters

what is your pickup's number of turns  ?
leds are in series or parallel ?

No one in this last 100 years paid much attention to Tesla's discovery that frequency in some way is a substitute for amps. This is MY discovery that he made this discovery.
I am very interested in following up on this.

where did you got that impression that not one payed attention to Tesla ?
you have study him, good, but have you study modern physic and/or electronic ?

frequency is not a substitute for amps.
frequency is use for transfering more amps in Tesla's coils since there are no core in them.
but there is also obstacles with higher frequencies and you have nailed one in your previous experiments.