Joule Thief

[Cap-Z-ro]

Near Rita's Tea Room ?

[mikem_2au]

@Mk1
I like what you have been doing with multiple toroid's, your
using one transistor and one collector winding, is this right?

my current experiment-

2 toroid's, each toroid with it's own 15 turn collector winding.
Each collector winding goes to it's own transistor, each
transistor has it's own Potentiometer.

1 base winding spanning across both toroid's, 6 turns on each
toroid.

40 turn 3rd winding on each toroid.
with one side under load i got a slight increase in voltage on
the other side.

I also tried this with two Fuji transformers, after separating
the 1700 turn winding from the base winding, each collector
winding went to it's own transistor, the two base windings
were connected in series to make one, the two 1700 turns
were connected in series with good results, then i tried
connecting the two 1700 turns in parallel to see if there
were any improvements in brightness of a cfl. the idea was
to have them in parallel, then using a momentary switch
to switch the two to series to start the cfl at a lower voltage.
Parallel wasn't a good idea, a 1700 turn on one transformer
FAILED.

mike..

[Mk1]

@Mk1
I like what you have been doing with multiple toroid's, your
using one transistor and one collector winding, is this right?

Yes only one transistor , and basic jt coils 4/4.

[jeanna]

Near Rita's Tea Room ?

?? ?? ??

Since Rita's tearoom is not a joule thief I will post my not joule thief youtube video link.

http://www.youtube.com/watch?v=vJz1FhO9uuI

I made a pond without a pond liner etc. It is an ecological exercise. (biology remember.) It is filling with water as we speak.


Enjoy,

jeanna

[freepow]

Hello everyone, i just joined as a new member on sunday night Australian time, my user-name is freepow,
I am attaching two joule thiefs that i,ve tried, both of these I used 2-AA i think, I could only measure just under 1 VAC with my digital multi-meter, should,nt it measure a good high VAC ??
I want to light a 240v - 4 watt fluoro with 1-AA, I dont want to use a disp-camera-circuit, any help with diagrams would be much appreciated, thanks.