Joule Thief

[PaulLowrance]

Woops, wrong attached old file. Now it's the updated file.

[PaulLowrance]

@ Paul:

Gee, you want everyone to drop everything and help you and yet you can't take the time to read back more than 5 pages?  What's up with that?

Also, just to let you know, I noticed how you were badgering Slayer007 about his drawings on Dr. Stiffler's topic and demanding that he post them your way.  Well sir, we do not put up with that over here.  These are a great bunch of hard working, helpful folks here who have tried to help you. We will not put up with any one that comes into these topics and makes demands and yet can't take the time to read what is already out there.

Just letting you know for the future.

Bill

I don't know about "demanding" that slayer007 post the circuit details, but his circuit was incomplete. This is open source forum, right?

Paul

[gadgetmall]

Okay Gadget,

Attacked is the latest. Any corrections? I want to get this exact! As you say, everything must be exact.     I'm sure there are more corrections for my circuit drawing.

Thanks,
Paul

for god sakes man . here .

Bill could you please clean up some of the bad schematics . i don't want any part of them . i know we all dont like to be nasty but paul read page 996 and go from there /then if there is something you need to ask or draw make sure its right . My first schematic is right . the only thing wrong is the secondary lower wire was overlapping the bottom of the coil /.

[PaulLowrance]

The reason it is centertapped is because the place where they are joined  is connected to the positive of the battery.
If you connect the other (free) ends to the battery terminals it would be in series.

another way to say it is:
the direction of the turns is opposite on this and that is what is making it oscillate.
You can try all day long but if you make them this way it will oscillate, and if you don't it won't.

thank you,

jeanna

Nice! I just saw that in spice. If the windings is wrong, it will not oscillate. When I reversed the winding as you say, it is now oscillating! 

Thanks for the help,
Paul

[Pirate88179]

Gadgetmall:

All drawings updated as you requested.

Bill