Joule Thief

[nievesoliveras]

Those circuits I posted are future things I want to implement into a JT and have nothing to do with the 43 LED test that I did.

That chip is a 600volt 1amp Bridge Rectifier from Goldmine: http://www.goldmine-elec-products.com/prodinfo.asp?number=G16049

The circuit posted in the pic is just a classic JT with a resistor parallel with a cap on the Base coil.

I whipped up a quick diagram. Hope this helps..

Thank you @hazens1 !

You know, I am trying to get feedback to the source and if I have success your circuit is on the list to replicate. Others to name a few are @jeanna's and @mk1's circuits.

Jesus

[jadaro2600]

Can someone try to replicate what I have done with the capacitor in place of the resistor?   ...it's actually a really simple switch, just make sure the cap is discharged before you insert it, or before turning the circuit on.

You can do this by temporarily shorting the cap with a piece of wire while it's in the circuit or by inserting it while it's out of the circuit.  The capacitance needed is dependent on the induction effects in the toroid.

Here is another diagram.  I feel as If I'm the only one attempting this.

[jeanna]

@Jadaro,
You may have replaced the resistor with a cap, but my circuits are not like yours so what good would this do?

I am not sure which cap you want also. Your drawing shows 2. I could give it a shot, so please tell me which cap in your drawing is replacing the resistor in your drawing...

My resistor is always at the base of the transistor as it is what controls the frequency. I have had a cap there parallel with the resistor which is like what gadget did. It seems to smooth things out a lot. Trouble is it smooths out the spikes and the special effects caused by the spikes sometimes goes away.
That is probably more to do with the capacitance than the fact of the cap being there I used 101pF to 104pF (remember the last digit means number of following zeros.)

@All,

I found a new and exciting way to read my 2 tier circuit. I KNEW there was a figure 8 in there somewhere. I got major volts in the rectified capacitor today, by setting the AC input to the bridge from the orphaned Emitter wire on one side and the secondary wire wrapped around the same toroid and in a positive area.

The same goes for putting the AC input points going into the bridge being the Collector wire and the other secondary wire which is in the neg spot in the circuit.

A scope shot says even a bit more.

Have a look. I found a place where the light is good. at least in the late afternoon.

The first tier toroid here is the MK.8 which is almost exactly a MK1 and the XTree is still on the second tier.

jeanna

[jeanna]

Since I have the scope and camera ready, I put a 104pF across the Collector and Positive rail .

The second tier shot I took before just changed to this.

Notice the drop of 80 volts down to around 20 volts. This is what I mean about the caps . They make nice waveforms, but colser to a sinewave at a big cost. I don't know which is better or rather more useful?

Another quick pic.

jeanna
EDIT
On looking at it again and comparing the 2 scope shots, it seems that the cap has only permitted the rising waves to be incorporated in the pattern. It is all above the x axis, and the number of total waves is closer to the number of upward spikes than the total which has many more downward ones.

[jadaro2600]

About the capacitor, I wasn't aware of the notation.

When I post a diagram, the number is the number as it is measured with my DMM.  0.120uF is just that.

I see, then this would be why I'm getting lower results with my setup.