Joule Thief

[TinselKoala]

The scope says
20KHz
125Volts between the 2 legs of one of the leds. (I forget if I had the x10 on. grr, I need to check that again.)

This is melting my switches!!

No, I think I put the switch in the wrong place.
Never put the switch in the wrong place.

The remarkable part is that the lights went on even when the switch was ...

very hot. (just as the box says. Hot cinnamons  yikes!)

jeanna

Hoo-wwee! You all are doing some good work. You're getting into the range where RF burns can be a hazard, though. If you want to see my fingers smoking and some LED's lighting up with outrageous voltages check out my "Resonance effects for everyone" vids. Using gotoluc and groundloop's circuits and aircore coils I was able to light up a neon bulb, in series with some LED's...with a single wire. And I gave myself some nasty little RF burns too!! "Smokin" as they say.
I absolutely love the JT. I've built a few and they are amazing. Keep up the good work!
--TK

[peterpunk]

@all

Hi all:

After that the kodak circuit not matched anyone here, I decided to buy a ferrite toroid core.
Now I got a 58mm outer 40mm inner and 17mm thick ferrite toroid.

I researched an read a lot of messages of this thread and other forums, but I don't know where to start.

The questions are...

Bifilar or Trifilar?

Gauges?

I used a screw to wind the wire (#28) to pass through the hole, but if its bifilar how should be done?

Thanks!

[electricme]

@all,
Ohh boy, RF, smokin parts, ohhh lookout, getting into energy here that I'm not so sure of.
I think we need to sit down and do a bit of research on RF energy and see if precortions need to be put in place.

@TinselKola,
Welcome to our little Joule Thief forum.
I see from your post you have done a little donut winding ha ha.
Thanks for the above post, it has served a timely purpose regarding RF.

I know in the design of RF PCBs the layout for parts and copper tracks is critical for the operating frequencies, and they have small earthed boxed covering tuned sections in TV tuners, hmmm
But this is about all I understand about this.

@stprue,
Nice double torids wound as a Joule Thief, would you get better results from this if you made the bifilar windings out of tripple wound wire?
Worth a try in this case, just to see what occurs.

I had several double toroids here which I posted pics of quite a few pages ago, did you see them?
Well done with the double T.

@Jeanna,
Thankyou for your kind welcome back, TA muchly.

Double toroids, mabe you could try the same as stprue has done, but see if those badies, the blue toroids you have there can be made to work? (only if you want to of course).

@ Thaelin
I got your PM ok, no worries, but when I went to reply, I couldnt.
A Red cross screen popped up, I clicked the OK to get rid of it, then a white screen opened, I clicked the blue arrow to get out of it, then screen appeared to reply to your PM.

Then I saw the address name was missing, so I exeted it.

@ Bill,
Im going to tale a serious look see for Firefox and see what happens when I install it.
Im using IE7 right now, hope I don't loose anything.


jim

[Pirate88179]

Jim:

You won't lose anything because you will be starting over with a new browser.  You can still keep ie7 and all your favoite places (bookmarks) but they will be on ie7.  You will just be using Firefox as your browser.  Once you try it and love it, which I know you will, you then name it as your default browser, and use it from then on.

ie can still be opened and used any time you want.  But, trust me, once you bookmark your favorite places again in Firefox, you will never go back to ie again.

There are many things you can do to Firefox to make downloads and page loading much faster, even though it is already at least 3 times as fast as ie from the start.

Just remember, you won't be removing ie at all, it will just sit there and not be used.

Bill

[electricme]

@Bill,
Thanks for all this excellent help, its appreceiated very much.
Im just about to do this but I want to say a hello to

PeterPunk,
Hello there is it "pete"? we are all a weird mob here, but you are welcome to brouse, wind torids, post your results and dont hesitate to ask for help (I can see you have done this) lol.

If you take a look at http://www.overunity.com/index.php?topic=6123.5470
you will see 2 big black DOTs, these are the beginnings of the Bifilar windings.

Stick with just 2 wires for the moment, until you understand it completly as it is very easy to get the wire ends mixed up.

Keep in mind we are only going to use the TORID part of the circuit.
The rest of the circuit can wait for a bit, until you get the torid down pat.

The DOTS represent the beginning of the wires.
The ends of the coils have nothing. (no DOTS)

At the top left of the circuit mark the TOP left wire as A
At the bottom Right of the circuit mark the wire as B
At the top right of the circuit mark the wire as C
At the bottom left of the circuit mark the wire D

Connect A and C wires together.
The wire D end goes to the Base of the transistor
The wire C end goes to the Collector of the transistor.

OK pete, hope this helped.

I gotta find a FOX        and stick it on the FIRE 


jim