Joule Thief

[Groundloop]

@guruji,

We are working on a circuit that will do two things:

1. Top up the input AA battery each time the voltage in that battery
    has dropped below a preset level.
2. An automated discharge circuit that discharge the battery capacitor
    each time the capacitor reach 2,6 Volt.

I will build and test the above this weekend. I will report any failures or
successes.

Groundloop.

[jeanna]

Jeanna:

Very good!  Now please tell me...how did you fix it?

Bill

Do you see those caps n the battery rail?
I forgot that I had tried them with the 48" tube, and after I shut everything off for the night I noticed them.(So everything went back on for that final success of yesterday!!)
2, 47uF regular caps in series across the battery rail.
I was told something about this a while ago that I believe was wrong. The caps in series works and the same 2 caps in parallel with each other do not.
The effect was immediate. It needs no coaxing whatever.
I think Lidmotor and jadaro are on to something similar and I will try it today.
Lidmotor puts 25r at the base and a 20r rheostat in line with the negative battery wire.
[edit lidmotor puts his in the positive side.]
Jadaro puts his in the positive.
They both have complained about heat and this may be from a flyback, but both are getting extremely long battery life = low amps draw. I think Gadget's repeater (tank) at the base resistor is safer, and I am going to check all these out this week.

@guruji

on the testing board everthing worked fine .
About the winding for the leds not around JT or around secondary should be?

There is the capacitance on the board. I often have some reduction in output, but not that much.
You may have popped the leds.
It is also possible that the secondary wires should be reversed.
Even when they work both ways, one way is stronger than the other.
I hope this helps.
Please ask your question again if it does not. I am not sure I understand it.

One should connect the coil directly to the led bulbs.

I am not sure what you mean, but yes, wrap the toroid with more turns and connect one end to one side of the leds and the other end to the other end.

I think this is a good place for me to add a video.
100,000 words on the secondary.
later for that.


@all,
Last night, I forgot to read the scope when the system was set.
I only checked with the scope initially. When I saw over 500v when the base resistor was at 1k ohm, I smiled, and put away the scope. But the volts are much higher than 500v.
So, here are the readings and the whole story.

Big unknown toroid 3.38" OD
2T,10T,>300T
TIP3055
70 Ohms at base resistor
895V (!)
2.27Khz
975mH coil inductance
2.51uF coil capacitance

jeanna

EDIT:
EGADS!!!
I was using a 20 watt cfl last night!!
No wonder I was having trouble getting it to start, and needed the battery caps!

So, everything else about the report is right except that it was a 20 watt cfl.

[innovation_station]

your good! 

no joke there... 

but i always knew that!

great work!   J   895v ! 

now i do wonder mass tuneing ...  1 10 300..   and your freq is 2.xx   i now wonder about

dubbling your freq and ballanceing the mass ..  there is a harmonic thing going on here ...

369
!st
814

there a tonne of ways this can be used .. 

w

with your config of

1 10 300   you could  use what you have for that core .. and just match mass
   
like  .5 1 1.5  or any combo there of ..  it should not be so freq spesific then .. 
or even equal mass across all 3
or run it backward ..  300 pulse coil pull 3 from 1 coil and 6 from another 

[jeanna]

http://www.youtube.com/watch?v=dTyprZxxza0

Newest video.
This is a new camera and the sound is terrible.
It gives me sybillant "S's" and hears the toroid scream better than I did.
Oh well.

jeanna's Lidmotor's Jeanna's Light

thank you,

jeanna

Ist, I corrected my mistake... another one. It has 2T not 1T
I am not a good typer!

And to comment on what you say.

I think this tuning you speek of will be a lot easier with a smaller toroid,
AND I really think this arrangement will light a cfl with a smaller toroid, too.

[Pirate88179]

Jeanna:

Great video!

My first still camera that I used to shoot my fist videos did that with the sound too.

That light is bright and, if I am not mistaken, that is twice the watts bulb that Lidmotor used.  I wish my parts were here already!

Very bright too.

Bill