Joule Thief

[jeanna]

The  only problem  I have had is  the  JT  drifing  out of  resonance .   If it  goes out of resonance and the  battery draw  goes up   it starts draining  the  battery .     

Hi Gary,
I really don't know that I was getting ou. I am not looking at that part of things.

The reason I suggested to use the same size jt for the second tier was this.
I think it is possible to get matches with others, but you know you have a chance at keeping the vibes at about the same frequency when you have the same toroid on the second tier.

Take a look at my 2 tier stuff and see if you don't see the same thing, well similar.

I didn't use a diode but I did because I used the light emitting kind.
I found 3 or maybe 4 distinct places where there was significant light and where the draw did not increase or the light diminish when I added more.

The loop of current was amazing.

See if I didn't get what you are seeing.

jeanna

[altrez]

@all

Well some more tests with my new pickup coil. I can light two strings of LED lights not all of them for some odd reason some on each string just will not light. Not sure why?

I am also using the basic JT circuit would it help to change out the transistor or resistor to get more performance? Right now thanks to jeanna I am seeing voltage spikes in the 340v range!

So my question is should I unwind that new pickup coil and rewind a one with 30awg wire at 300+ turns? Or try and work on the back end first? I am sure that I can push over 1000v with a 300 turn coil.

Thank you!

-Altrez

[WilbyInebriated]

nice job!
is it every other led that doesn't light?

[altrez]

nice job!
is it every other led that doesn't light?

Thank you! No its just random ones from each string. I tested them and they all work when plugged into the mains.

-Altrez

[jeanna]

@all

Well some more tests with my new pickup coil. I can light two strings of LED lights not all of them for some odd reason some on each string just will not light. Not sure why?

I am also using the basic JT circuit would it help to change out the transistor or resistor to get more performance? Right now thanks to jeanna I am seeing voltage spikes in the 340v range!

So my question is should I unwind that new pickup coil and rewind a one with 30awg wire at 300+ turns? Or try and work on the back end first? I am sure that I can push over 1000v with a 300 turn coil.

Thank you!

-Altrez

I took my string o leds apart after I got them to light and only half of them lit.
There was a diode in the first and the middle or other end light. I think It probably protects the string from surges which would kill it under normal wiring conditions.

There were 3 wires at each of these fatter bases. The rest had 2 wires and were smaller.

340v
cool.

Are you using a breadboard? If so it is an easy job to try a few different items.

In fact.
Put a pot -I used a 1k pot for this. And with the scope on the 2 secondary leads, slowly turn the pot and watch what happens.

This is where I first noticed that as the frequency goes one way the voltage goes the other.
check it out.

jeanna