Joule Thief

[jeanna]

Jeanna

I have not  been able to get  your 2 tier JT working

Really!?!

What is not happening?
The amps draw is higher with it as 2 tier. I think I posted it. Part of that extra is because the bjtl of the jt on the first level with the transistor is in its place. That always takes a big draw.

I suspect you have a file with the information I gave along with it?

In a general way, there is one circuit that involves the whole (second tier) thing - all 3/4 wires. The 2 secondary wires and the upper tier primary bifilar that goes around that toroid.

There is another circuit that involves just the base coil of the second tier and the pickup (secondary) of the first level

and a third that uses just the collector coil of the upper level and the  pickup (secondary) of the first level.

Of course, they all use all 3 circuits and the pulse from the one transistor etc.

But they give out different amounts of light and turning a led around can shut off all or just one of the others.

the bjtl on the first level with the transistor is effected by only one change in the upper level. I will need to review this to give you more info.

jeanna

[stprue]

simple test of a tesla bifiliar coil take 2 nails and 2 equal lengths of wire use one to just wind a regular coil the other fold in half and do a bifiliar. the bifiliar has more magnetism. also its picking up REALLY well in the JT curcuits! i dont think ill be using regular coils ever again!

also heres a link of something you guys might like.
http://www.youtube.com/watch?v=rt3DMyanfWc

cheers

Nice find!  I want to make one now!

[altrez]

@all

I think I have been building my JT circuits wrong? I have noticed that my transistors have been running extremely hot. I mean to the point I can not touch them. I have had a 1k resistor in place and thought it might not be enough so I added a pot like jeanna suggested for testing.

I noticed no matter how much I turned the pot it made no different in my voltage output. So this lead me to believe that even though it has been working and working well. I have had the circuit miss configured this whole time.

So now I have put a 10k pot on the base of a TIP31 that runs to one end of my primary coil and started testing. My voltage on my diode bridge jumped from 42v to over 160 plus!!!!! that's rectified DC voltage.

I wonder why it was working before? And if I have been reading the schematics wrong this whole time?

Any help or insight would be great.


Thank you!

-Altrez

[Pirate88179]

Here is my container for my replication of Wilby's Light.  I just got it today but, it is full and I will have to work on emptying it.  This is the part of experimentation that most people don't see.  It is all of the hard work that goes on behind the scenes that never gets put into any video.  This will be my sacrifice to our JT topic.  When I get it done, and get it built, I will make a video.  I could not find a Coor's keg so it will not be an exact replication.  I hope it works anyway.

Bill

[jeanna]

Pretty funny, Bill. 

I noticed no matter how much I turned the pot it made no different in my voltage output. So this lead me to believe that even though it has been working and working well. I have had the circuit miss configured this whole time.

So now I have put a 10k pot on the base of a TIP31 that runs to one end of my primary coil and started testing. My voltage on my diode bridge jumped from 42v to over 160 plus!!!!! that's rectified DC voltage.

I wonder why it was working before?

Any help or insight would be great.

Of course that is possible. But without some kind of description, it is really hard.

So, now you have the base resistor in the right place.
It is attached to the base of the transistor and to one side of the coil. That side is what is called the base coil.

Do you have the twisted pair going into the pos battery rail?

The other wire from the bifilar goes to the emitter of the transistor and remember to jumper that to the neg side of the battery rail.

Is that what you have been doing?

jeanna