Joule Thief

[gadgetmall]

@all

News about the mk1 High voltage , dual 80 inch pickup coil , 850 v rectified dc its about 70 turns , 2n2222 with 1k base resistor diode bridge made of 1n4007. Any idea what i will be doing with this one ? And this is from a one inch toroid .

Mark

WOW Mark . nice Man . I still want one . I will treasure it and hide it for the Times to come .. . need something let me know .
Gadget

Gadget

[Mk1]

@gadget

I will send you one , pretty soon  i am waiting for my check , so i have enough to mail it to you , so i will need to wait 2 weeks.

I like the cap flop idea , it should work great .

Mark

I also found this little thing , look at the power input.

[jeanna]

News about the mk1 High voltage , dual 80 inch pickup coil , 850 v rectified dc its about 70 turns , 2n2222 with 1k base resistor diode bridge made of 1n4007. Any idea what i will be doing with this one ? And this is from a one inch toroid .

Mark

Very nice, Mark,
And a one inch toroid too. You must have used thinner wire to get it all in there??  850volts. Watch out! no leds for you!

----

I had some success with my MK.8 today.
This is made going up then down then across then up then down. This only has 10 x 4 so 40 turns with 6T,6T primary not split. ( that's why it is not MK1)

It was in the second tier circuit, where there is no transistor at all,

I lit 24 white leds IN SERIES!!!

The other cool thing today was that I was able to light 3 yellow leds in the first tier in series , and use an extra secondary to drive the second tier with blazing bright leds.
I am sure the frequency is important in what is happening in the second tier. I pulled one wire out of a led leaving only one secondary wire on the + leg and the led stayed lit. (I don't need to say that shouldn't happen.)

But I must say I am drawing two conclusions from all this second tier thing.
1-It is frequency as I just said,
2-The total volts produced by one battery running 2 jtc's in stepwise fashion is often less than just one jtc with secondary if that is wound well.

I would say this second result is what I have been studying for the last week. I wanted to see if one battery powering the jtc in stepwise fashion would give more useful power or not.

I will see more of what it can or cannot actually do in the next few days. meters can only promise. I want the full delivery before I am sure it is there (or not there.)

thank you all,

jeanna.

[Mk1]

@jeanna

I forgot to mention 80 inch 30 gauge , so 6.666666666666666666666 feet. Tested on a aaa battery.

Mark

Edit Jeanna  nice work there 24 led in series !

[TheNOP]

I did a lot of that before I got the scope. I only found a straight line. More resistance, less light in the jt or in the secondary run leds.. Less resistance, more light.

you have, but now you are not in the dark anymore, you have a scope that show you the frequency.
you are not in the dark like me anymore.
but yet, i still manage to get "good" results by other means, that are not exactly as strait forward as a tool that can tell me the frequency.

I know gadget did this with the fuji with success. I haven't seen a sweet spot by changing the resistance. (I may have the other day.)

with just the resistance, you only rely on the feedback through the base coil for the frequency.
by using a tuned "resonator"(RC circuit), you can make the frequency higher.

What am I looking for?

depends on your goal.
first, the best frequency for your toroid.
best frequency = higher voltage/currents and less loss.

What am I looking for in the frequency when it is right?

nothing in the frequency itself.

when the frequency is right for you toroid then,
you will have less loss and will have almost reached the maximum currents your jt can provide to you.

...I don't get a number except in dB that might describe a frequency. I think dB's are amplitude, so I don't know about that.
I will look around this thing again.

I can set the amount of time between markers and the scope tells me what the setting is in terms of seconds and Hz. This is what you can see on the screen. I had set the time to 2.4kHz.

I am most likely missing what to do to get the scope to calculate the frequency. So far, the only thing the scope is calculating is the volts and some other things like rms and dB if I want them.

in this picture
http://www.overunity.com/index.php?topic=6123.msg172374#msg172374

the 50 us/div  mean  50 microsecond per division and is call the time rate.
that division on your screen is the inbetween the 2 vertical bars.

count the number of cycles between the 2 bars
if you have trouble to count them set that 50 us/div  to something faster. like: 1 us/div.

if you do the math, 2.40kHz will be the result.
that 2.40kHz in the pic is the frequency, the number of cycle per second.

the 4.15us value is the time between 2 peeks(spikes)

the 160 v value is the peek to peek value, value from the lowest peek to the highest peek (average).
the 105.3 v value is the calculated rms value, it is not very accurate if the signal is not 60 Hz.

Note
the frequency can change with the time rate.
the cycles i see on that pic are not always the same and that is why it can change.

that kind of signal making the frequency(Hz) value not as accurate as you set the time rate lower,
and more accurate(more average) at higher time rate.

as you can see, you are not changing that value with per say.
that Hz value accuracy can change with the "kind"," purety"(i can't find the right word), of the signal and the time rate setting.
but still, it is way better then nothing.


the 20 v/div mean 20 volts per division, those divisions are on the left side of the screen from top to buttom.
set that to 1v/div for the 12 volts test i suggested to you.

News about the mk1 High voltage , dual 80 inch pickup coil , 850 v rectified dc its about 70 turns , 2n2222 with 1k base resistor diode bridge made of 1n4007. Any idea what i will be doing with this one ? And this is from a one inch toroid .

cfls ?