Joule Thief

[jonnydavro]

@Xee2 and stprue.Many thanks.
@Jadaro.Thanks for the reply.The first thing i did when i found this effect was think like you and swapped in a diode and the effect does not happen,only with a transistor so there is something crazy going on but what?Jonny

[stprue]

Hi Stprue thanks for response I used the 2n3904 too not as kooler maybe I should use a thinner or thicker gauge coil.
I was seeing your board photo and you put three caps with the transistor what are those?
Thanks

Those caps were 221 but a 500v  mica works better.  Just try stuff!

P.S. the toroide was a 3.38" that I was using...right now I'm testing with a 1' goldmine  same wire guage

[kooler]

hey guys
i just use the mps2222a because it will run with 0.2 volts.. don't know the min current..
the inductor is not needed.. you only need it if you have problems adjusting the pot..
i have had a tip31c run at 0.16 ma..
i try doing some windings more turns on the cap side..

robbie

[jadaro2600]

Hi stprue today I did this circuit but it was consuming about 0.25ma not 0.07ma. How did you acquire those results that you've said in consumption? Ok I had about nine leds and they lit very dim. Is it maybe I should use 470k pot cause I used a 220k?
Anyway thanks to kooler for the circuit.

@Jadaro.Thanks for the reply.The first thing i did when i found this effect was think like you and swapped in a diode and the effect does not happen,only with a transistor so there is something crazy going on but what?Jonny

It may be advisable to measure the ohmic resistance of the path and report / record the results.

Transistors have junction capacitance; cheap ones will inter operate their Collector and Emitter, one being operationally indistinguishable from the other.

I found a chilliqueen setup in which if I simply let a capacitor hook up off the base ( of the PNP ) connected to nothing, the circuit would function.  Diagram here: http://www.overunity.com/index.php?topic=8564.msg219117#msg219117 already; this is similar to the capacitive coupling of the metal pans and such, just on a smaller scale.

[innovation_station]

8 JT  cap charger board ... 

: )


ist!

http://www.youtube.com/watch?v=MpkByZZVfvE