Joule Thief

[innovation_station]

@ gadget..   you leave  the electronic on the cfl this could also be my problem ...  i have removed all electronics from the cfl's

i got more so i will leave em on there and try it agin ...

also on your mod it apears diffrent than i have done ..


ill get on it  in a few min ...

ist!

[slayer007]

@ All

Make sure you use FERRITE cores not the colored toroids that are powedered iron.
With the powered iron cores I can't get any voltage out of my secondary coil.
And the BEMF is about half what it should be.

I made a big one on a three inch colored toroid it had two JT's on the same toroid with a 100 turn secondary wind.
The JT works but the BEMF is about half what it should be and the secondary winding I get 0 volts.

I have one just like this but with only one JT on the toroid and a 100 turn secondary and I can light a neon on the secondary.
With the powered iron I get 0 volts off the secondary.
I guess with the iron you can't get it to go to a high enought frequency.

[Koen1]

Hmm this is an interesting observation, that apparently ferrite cores
behave differently than iron cores somehow...
Would that mean that the old iron cored PC transformer I have here
could turn out more efficient when I rewind it around a ferrite core??
Interesting stuff...

Anyways, since we seem to be slowly moving toward CFL/CFT lighitng
with a JouleThief-like power feed,
does anyone think it possible to move in the direction of electrodeless lamps?
After all, to light a CFL we need high frequency, and to light an electrodeless
lamp we'd need RF, and with the freqs we're using already we're not far off
(for info on electrodeless/RF lighting: http://en.wikipedia.org/wiki/Electrodeless_lamp
and for those allergic to Wiki: http://ecmweb.com/mag/electric_rf_lighting_tunes/ )

Oh, and of course RF lighting is very Tesla.

I was just thinking how neat it would be if we could actually manage to light up
lamps without direct electrode connection and using only one single wire
per lamp too...
Or perhaps that's more a thing in the playing field of Stiffler than of the JouleThief?

Well, just got a handfull of new ferrite thingies in the mail so I'm off to wind a few
trafos. Seeya later

Regards,
Koen

[gadgetmall]

@ all
I drove into town today and bought a little device to try and get the best output out of my torrds.
What I got was a "Resistance Wheel", or Resistance Substitution Wheel". It cost me $19.95 Australian dollars, would be about $10 American.


This device has inside it all the resistors from 5 ohm to 1Meg ohm, I clip the red and black clips where the 1K resistor goes at the base of the transistor and after applying power, I turn the wheel until I get the best possible setting, against the best output of the torid.

Look at the scale, the pointers arrow will point to the resistor which is the one putting out the best voltage.

I believe there is a Capacitor wheel as well, I will get one of those as soon as I can.

jim

WOW . that is Nice .. I want one and a cap wheel you got to be kidding .. Wish i had the MONEY and lived in CANADA darn..Very Cool Device to have beats the heck out of soldering piece after piece.
AL

[Koen1]

WOW . that is Nice .. I want one and a cap wheel you got to be kidding .. Wish i had the MONEY and lived in CANADA darn..Very Cool Device to have beats the heck out of soldering piece after piece.
AL

... just an idea; you could make such a wheel yourself, just make a little wheel
with a slide contact and seperate contact sections connected to each individual
resistor with all of the resistors connected to the outer rim, then connect the wires
to the central connector and the rim, and slide away... that way you'd only have
to solder the thing together once...