Joule Thief

[jeanna]

jeanna, good job, very good shining brightly!

thank you

what light bulb  (light diode, or fluorescent) you use in a green lamp?

20 wide light diodes in series.
This is a commercial bulb.
I made no modifications.

you connected 3v?

2 AAA, these are about 2.4v (maybe less. They are at 2.33v today.)

what options Ferit teroid?

Please see the picture
Toroid = ~2.5cm diameter
4T,6T,57T -- I think!
TIP31c transistor
~390-410v on secondary

shade play an important role?

yes.
It is silk which spreads the light best.

Why so little bad light?

I do not understand this question.
Are you referring to the little light?
This is a different color and looks less bright.
When these 2 are sharing the same joule thief circuit (jtc) they are both less bright than when either one is on by itself, but the total light is greater than just one.

Here is a picture of the 20LEDs bulb that I used.
All 20 are called "straw hat" and are like the "wide diode" one you show.
This is also the same circuit that I used in yesterday's picture.

thank you,

jeanna

[sparks]

@Jeanna

    I cant remember who it was that was driving the xenon bulb with a second stage jt.  sptrue wants me to do a hvoltage series connected string of leds driven from a high voltage scource.  I was wondering if you could give me the name of the poster who was doing the works with an scr driving an ignition coil or it could have been a mot.  If he was to replace the xeon with a very long string of leds he might satisfy my curiousity as to how bright a light you can get from a jt.  Otherwise I gotta go out and buy ALOT of leds and ballasting for the 2or3kvs you get from an ignition coil setup.  I think Bill did a string of led/s that lit off of one wire a while back.  I dont know if this was before the jt became so popular but I thought that was kinda cool.

[jeanna]

J  I LOVE IT !   I DUBBLE LOVE IT ...  LOL   

your   wild!  : )

you brave enough to plugg it into the wall ?  ....   yikes ... 

just imagine it ran with 110vac 15 amp ...  oouch!

: )

I think you do not understand.
I made a joule thief and attached the secondary wires to the wall plug thing from the hardware store.
This allows me to use an UNmodified LoA 20 leds bulb.

I had been having the problem that it would never stop cycling even with the lamp switch off,
That is because of the capacitors in the bulb.
So, this way, I can move this little joule thief power uni (JTPU) ( ) to a spot near this lamp and I can plug it into the joule thief secondary.
But, since it is an unmodified bulb, I can also plug it into the wall in the normal way.

I modified the switch and plug, not the bulb this time!! ,

thank you,

jeanna

[xee2]

the name of the poster who was doing the works with an scr driving an ignition coil

That was kooler

[xee2]

@ ist

I assume the bridge and the capacitor get hooked to the spool of wire. Does anything get hooked to the copper wire around the spinning disk?