AC from Joule Thief Secondary/pick-up

[jeanna]

Thank you Bill.

~~~~
Today, before I tear everything apart and make a bedini charger, I tried something I wanted to try, but haven't.
I tried to make a battery charger from the secondary area of this complex joule thief.
This should be possible and very easily so.
I pulled out my trusty wheatstone bridge made after electricme's excellent instructions.
I added a couple of extra diodes too as I did before I got the scope.

I wasn't sure which way to put the battery leads, and after reading a few posts about it here and at the energetic forum, I tried it first one way then the other.

I did not write these things down and I may have them reversed...
If I put it  black to black, the lights in the forward part of the secondary went dim.
If I put it red to black, as I think bedini suggests, then it seemed that the battery was pushing out. Maybe the battery is too charged...?
Either way the battery did not charge at all and in one direction diminished.

I am wondering if I am supposed to use a capacitor?
It seems bedini circuits have both, but there are so many variations, I am not sure at all.

Then I noticed that the battery was draining fast.
In the end Ilocated a .47ohm resistor and see that at almost full power it draws .095A or 95mA.

I have been not trusting the amps draw readings because it is clear that when using the 33 ohm resistor at the battery, the lights are very dim and calculating with ohm's law shows a lower amount than when using the 10ohm resistor.

In any case I believe this 95mA for the circuit, and feel much better about posting the amount... so forget the 23mA I quoted above.
It might have been close to correct in the beginning, but not after I added so many lights.

So, at full brightness 30 leds draws about 100mA from the battery using this complex circuit.
They are all in series and it comes out to 3.34mA per light... still pretty good!


jeanna

[jeanna]

Hi everybody,
I have been at it again!

Today marks the beginning of going over the same territory but with a more powerfully wound toroid.

I took some last measurements with the xtree and replaced it with the new MK1Jeanna hybrid...
This needs a name. so I will add a name, but first....

The lights without the battery resistors are incredibly bright.
They are bright everywhere, too. In fact where I was struggling to add a 4th light to the very last light on the last circuit, today I HAD to add it for the protection of the rest.
---just to keep you all confused  , it is as pictured in the last drawing, because I had ended up removing that 4th light but never took it out of the drawing...I just put the change into the text.



Going into the experiment, I knew there was more than one difference in this new toroid from the xtree.

The primaries are different too.
It is modeled after the widow.
This has 5T,8T, ~84T (on purpose about the same pickup secondary as the xtree, but the best tuned this toroid gets seems to be 5T,8T and the xtree is 10T,10T primary wires., so it only makes sense to use this.)

The unevenness makes a difference.
At first I struggled. The lights were really dim, yet the voltage was higher than the xtree.
I was unsure why ... Then, I remembered to turn the secondary wires around, and wow, biggg difference.

This still has only one secondary pickup. I will add another one later, maybe tomorrow.
I am relieved. This now looks very promising.
I think I will wind the second pickup in a solenoid fashion, straight.
At another time I will see about a MK2jeanna hybrid because Mark always says to wind them together, so I will try that on the next one.

Anyway, the thing I WAS concerned about before I started today is that I was afraid I would have to change all the inductors and caps for better tuning.
I do not thing this will be necessary.
The brightness is amazing and the waves look right.
Well, so far.
Perhaps if I were to make this with a different toroid not just the wires, I would need to repeat all that fiddling.

OK
That is it for now!

thank you,
jeanna

edit:
oops, no I forgot the amps

The full brightness going through a .47ohm resistor is 102mA for the 25 leds verrry bright.
Through the 10 ohm resistor, 42.6mA, but significantly less bright, so it is just a number for contrast.

[Pirate88179]

Jeanna:

Great work!  Was that only a 47 ohm base resistor you posted about?  That is very low ohms compared to the JT's I have wound and tuned.  As I said before, I don't like resistors anyway so, the lower the ohms the less energy we are wasting I believe.

My big toroids are on their way and so is my newbie wire.  I got my TIP3055's today, 10 of them.  I am sure I will be PM'ing you when I start to replicate my Jeanna Light.  I really can't wait.  It must make winding a lot easier with that large ID.

Bill

[jeanna]

Jeanna:

Great work!  Was that only a 47 ohm base resistor you posted about?  That is very low ohms compared to the JT's I have wound and tuned.  ..........

My big toroids are on their way and so is my newbie wire. ...........  I am sure I will be PM'ing you when I start to replicate my Jeanna Light.  I really can't wait.  It must make winding a lot easier with that large ID.

Ah good.
I am glad you are getting newbie wire. The little spool it comes on actually goes through the hole.
The 1/4 lb spool is too wide. It would make a good ruhmkopf coil secondary!

I probably made the resistor thing worse by mentioning it.
It is not for use while the jtc is working.
It is just cuz I don't have an amp meter.
I know it is confusing.
Here is the deal with the 0.48 ohm resistor.
I put it in the battery line ton read the amps draw.

51mV divided by .5 = 102mA and it might be true, because the light in the system is similar. If I use the 33 ohm resistor at the battery and read the volts in series, I get 30 or 20 mA, but this is representing a much dimmer light.
I realized this a month ago and decided to stop worrying about my amps draw, but when I use the half ohm, it changes the light too little for me to see, and I think it actually reflects an accurate amount.

I am really delighted you will be making one or 4 of these, and I am certainly ready to help if needed.

Oh, btw,
The base resistor is about 150-200ohm.

thank you,

jeanna

[innovation_station]

.48 ...  is this correct ... that is extreamlly low ...  might as well call it its natural .. lol


do you find this to portect the transistor at all .. or is this for fine tuneing ..  i personally know it honestly dont matter ... just pulse the pulse .. then sync that to 7hz.. drop a mag on it and watch it FLY ...

ist!