Joule Thief

[Mk1]

@jeanna

Good !

I was just thinking about it , sorry.

[crowclaw]

Now, what I find curious is that you understand immediately why I should see NO voltage after installing the diode and cap. What I do not understand is how you say that but then  seem to say that xee2's circuit will do the job.

=======

jeanna

Hi jeanna,
I only refer to XEE2's circuit as it demonstrates how a capacitor can be charged up from the JT to further my explanation of charging and discharging a capacitor and the time constants involved in this process. As I have mentioned the  energy dumped into a load will give varring results depending on the nature of the load and it's resistance to the discharged current flow, hence XEE2's Xmas tree bulb lights up as expected. This bulb is of course a very low voltage filament and not a CFL. If your supply is 110v count how many Xmas tree bulbs that made up the set and divide into 110v the answer will be the voltage rating of the filament. try the same experiment with a standard 110v filament lamp. The internal circuits of CFL's are specifically designed for AC 110v 60Hz and use either free running or diac synced high state and low state oscillators, bridged to provide the necessary pre_heat and drive for the CFL. If you Google CFL circuits/schematics you will gain a better understanding of these circuits.

[jeanna]

Thank you crowclaw,

I was not able to get the little christmas bulb to work either, so, I think I must be doing something wrong.

Unless xee2 is using kooler's circuit he is NOT getting a pulsing voltage of 1kv.
And, since I am, I think I should be able to light the little christmas tree bulb too.

(If xee2 was using kooler's circuit when he made the video, then the playing field is not even, and that is the reason, and not something I am doing wrong.)

Anyway, there is a trigger switch in the camera circuits that allows the capacitance to pop and light the xenon bulb. I think if I can get this kind of configuration, possibly I can get the unmodified cfl to light, and maybe once lit, it will stay that way... more hoping! 
btw, I am no expert, but I have studied and stewed about the time constant, and I am with you on this.

thank you,

jeanna

[innovation_station]

playing with the cam board ...   the thing will suck a 12 vdc lawn tractor   dry FAST! 


MY MY WHAT A PIG ...

lol

probally work good for the B caps

i hooked 6 up darn near burnt out my transformer ... it is step down  12vdc to 1.2vdc 11oo ma

and .. those things want more .... 600v output  with 6  hooked up

never tryed a bulb did the cfl no cap ... does same thing but good and bright still flashes ...

ist!

i just did the same thing with 1 cam unit .. i have blowen 2 power supplyies ... 

must be some big fly backs on input side .....  this is odd..   

but burnt to 12vdc step downs ...   

hummmm

[xee2]

for jeanna

EDIT: switch is two wires touched together