Joule Thief

[jeanna]

I only suggested it because I found that after I had posted the other numbers, which I got from you.

As always, I appreciate your work.

jeanna

[jeanna]

Hi everybody,

I unwound the tor-61 which I was using for today's tests. This is  1 1/2 inch OD  if that.
I wound it 4T,7T,74T and saw that I had over 600 volts at 20khz or so. This is great, because the frequency makes it quiet!!
It easily lit a neon and I stuck on the 10w cfl
Half of it lit.
Next, I lit the 7w tube. It was easy to light.

So, encouraged, I pulled out the 20w tube.
This is interesting, because it lit about 1/3 the tube, but it lit it all at the one end. I could let go, no problem, but it would not expand to fill the whole tube.
This is where some heat could probably help, but this is cold electricity and it must do it without heat.

I include 2 pix.
1- is the 7watt tube. Notice how close to the ends it fills the tube with light. (>600v)
2- is the 1/3 lit 20watt tube.

@Bill, way to go!
Isn't this sooo much fun?

jeanna

[kooler]

howdy..all
has anyone had a chance to build the side by side toroids to lower input current
i tried it on those 1'' goldmine core with good results i just need more turns to get more volts out
it interesting to see how you have to wire the secondarys after putting more cores in
i wired five 1'' toroids together.. and it like the secondary wire backward to each other to get the volts out of it...

[xee2]

@ Pirate88179

Congratulations on getting more power out of your coil and thanks for sharing your test results. You are correct in assuming that the higher frequencies will not hurt you (they only pass over the surface) and that getting zapped would mean the frequency was coming down. However, normally removing turns increases the frequency so I am a little puzzled by your test results. I hope you will try my test for output power and report how many milliwatts are coming out of your pickup coil. I think that will be a good way of comparing the performance of the many designs we come up with (more scientific than trying to say how bright a bulb is). A word of caution, your coil is putting out well over 1000 volts. Use at least 2 capacitors in series to increase the voltage they can handle. AND, be careful, even small capacitors charged to over 1000 volts can be dangerous. Always discharge the capacitors with an insulated screwdriver as soon as possible so that they do not accidentally zap you.

EDIT: On second thought, this test is dangerous. Perhaps it is not such a good thing to do.

[xee2]

@ kooler

howdy..all
has anyone had a chance to build the side by side toroids to lower input current
i tried it on those 1'' goldmine core with good results i just need more turns to get more volts out
it interesting to see how you have to wire the secondarys after putting more cores in
i wired five 1'' toroids together.. and it like the secondary wire backward to each other to get the volts out of it...

I am working up to it. I will make one toroid with 250 turn pickup tommorrow and then try two after I do some tests on the single one.