Joule Thief

[jeanna]

I should be getting pulsed dc in which case the scope can show me the peaks.
And there are no peaks.
Anyway I am reading volts across the cap wires because the secondary wires lead into those.
thank you, xee2.
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@All,
I think I need a filament bulb where the filament is broken.
The sparks that jump from the secondary wire to the bulb wire are about 1/32  inch long if that. The scope sees 1000v, so, it is about right if ADMoore is right.
So, if there were a space that size between wires inside the bulb, maybe it would make a spark brush.

Maybe what we/I need is the kind of bulb tesla was making for his high voltage.
I thing in the end he used the fluro tube, but he played with vacuum or plain air and a lot of other things. We probably do not have what he made except for the fl tube.

OK I need to see what additional series inductors can do to the hairpin, since that is my next question.

Thank you all for your help,

jeanna

[xee2]

@ jeanna

Attached is what you should have except with a larger capacitor and the bulb would go where the voltmeter is after the capacitor is charged (only takes several seconds).

[xee2]

@ jeanna

The DC in the cap is not pulsed. It is the same as in a battery.

What does your scope show when you hook it up to a battery?

[jeanna]

@ jeanna

Attached is what you should have except with a larger capacitor and the bulb would go where the voltmeter is after the capacitor is charged (only takes several seconds).

Thank you for finding that picture.

That is what I have and the cap is 105 instead of 102. It is in the pic. It is a ceramic and rated for 1000v. The diode is 1N4007.
I do not have the 200uF at the battery, but that should not make any difference. This coil is producing 1000v without it.
The sparks show the voltage is coming out the secondary in a very steady stream. If you look with a lens you see this pretty purplish (uv?) color.

,
just no light in the bulb.
thanks,

jeanna

@ jeanna

The DC in the cap is not pulsed. It is the same as in a battery.

What does your scope show when you hook it up to a battery?

OH

So, that is why you wanted a second coil and the ignition coil?
first, you took the secondary then you flattened it with the cap then pulsed it again to give the spikes you used in the end.
Is that the way you worked it?

j

[innovation_station]

what is the diode rated in freq ... 


perhaps it is not a verry high freq diode ....  but you said your output is 2....  khz ...

i used 4007  but as i said others work better ...    i have built i bet u  50 things useing 4007

and 4001 for feedback off base ...   

most are air core coils ran at 5k ... 

any how have fun hope you work it out ...   

i just got 15 9v batteries FOR ALL MY METERS .... 

cleaned table 3 and 4 up ready to ROCK!

and set up a 3 teer spool shelf ...  lol   

and i will begin to get my cam boards ready .. for the 30 cfl boards  i have laying round ..   so i can bang at like 100v cfl freq... 

: ) 

or even go so far as to just rectify from cfl to cap ... insted of bulb ... 

playing paints the picture ...

w

the piano man! 

http://www.youtube.com/watch?v=se9rfWucgeY

paul  is talking to davvie whos still in the navy!   
and probally will be for life .......   
while the buisness men slowly get stoned

REGARDS~

AND SAY MAN WHAT ARE YOU DOING HERE....... 

~~~~~IH~~~~~

wateing on Q ......  la ditty da titty da da