very high and powerful voltazh voltage from a small voltage

[Jimboot]

Thanks for bumping this thread Laurent and your replication vid. Sergei's latest vid with a is also very interesting.

[d3x0r]

It's really a joule thief Not having the coils interleaved doesn't really matter.  The two pickup coils end up having a priority I noticed; partially because it's a unipolar oscillator I think, if they're not connected, one will get power before the other, and probably (only hypothetical...) One would get a larger spike in voltage and overall will be a more gradual decay on the induced voltage, than if they were interleaved biflilar.  not trying to rain on the parade

[Jimboot]

It's really a joule thief Not having the coils interleaved doesn't really matter.  The two pickup coils end up having a priority I noticed; partially because it's a unipolar oscillator I think, if they're not connected, one will get power before the other, and probably (only hypothetical...) One would get a larger spike in voltage and overall will be a more gradual decay on the induced voltage, than if they were interleaved biflilar.  not trying to rain on the parade

Haven't seen anyone melt steel yet with a joule thief

[Jimboot]

here's my effort http://www.youtube.com/watch?v=QbUwst77Jgw

[woopy]

here's my effort http://www.youtube.com/watch?v=QbUwst77Jgw

Hi Jim

super, it seems to work with not so much turns and one single transistor at 9 volts

did you count the turns of the secondary on your toroid ? and what is your variable resistor value ?

well done and now lets try to melt steel yeepeee

Laurent