Joule Thief

[Thaelin]

   Actually, the way Gadget has the output caps and diodes is a voltage doubler circuit. They are used where you want high voltage at the cost of the amps output. Each stage will drop the amps out more. Simple but works well.

thay

[gadgetmall]

Since the sun is about to set on the pacific ocean, and I awoke today with a dream about studying inductors, I figured it was time to start. 

I did look up inductors and found all the same stuff I have read many times before. I had a familiarity and better understanding than ever before, but nothing too new hit me, so watch out...

I wrapped a ball point pen with 12 turns of 26awg mag wire and stuck it in parallel with the base resistor of my current MK1 which is the 3T,4T,92T I used to make all those tables. There probably should be a cap also, but there is not.


And it was hot again.


I don't really know what to do with this but it did really raise the volts. I may look into this, but the heat is a problem. I think the next thing to try is in series with this resistor, yes? yes.

and a cap.

ok 4 now, the sun has set.

jeanna

EDIT simultaneous post
@gadget,
VERY very nice altoids box. very nice.
I didn't realize that dc converted the way you said-- doubled instead of halved. It is even better. I am glad you say you didn't full bridge it. I still need to work to understand this better.
very nice

Yes in series with the base before the resistor cap will stop the overheating .

Nite nite . I have been at this for over 24 hours this weekend and i am shot .. you all take care and Dream About our future Energy Solutions we all are comming up with .. Sweet electric dreams

ALBERT
AKA the Gadget

[jeanna]

Yes in series with the base before the resistor cap will stop the overheating .

Nite nite . ..
...and Dream About our future Energy Solutions we all are coming up with .. Sweet electric dreams

Gadget

yup, well, maybe dream on. I tried it and nada. no heat, but no effect either. The circuit didn't even notice it.

I might give it a try with a cap also in the parallel etc.

more to try tomorrow.

dream on  ...   

Hey, thanks for sharing so much today, gadget. It was great to have you around again. You are an inspiration.

jeanna

[hazens1]

I woke up from my own dream and could not go back to sleep.. It's 3:00 am here in Iowa. My dream directed me to take my smallest toroid, a 1/4 inch that I took out of a 13 watt CFL and wind a classic JT and it would light the world 

So I quickly put a 14t-14t bifillar on it and hooked it up using a 1k ohm and a 2n2222. Man that thing is tiny! Barely bigger than a single 5mm LED! I fired it up with a nearly dead AA and the pictures say it all 

I have 64 LEDs in parallel on a board for testing high output JT circuits. WOW!!! These are 64 of those 100 x 5mm 20,000mcd LEDs I got from Ebay and they are bright 

This has got to be a record for the smallest, simplist, highest output classic JT. It looks like it could light way more than the 64 that I have hooked up too 

I'm getting tired again. I'll take measurements in the morning and some more detailed pics.

Pictures were taken in pitch dark with the flash off.

[stprue]

    Just curious, but has anyone tried to wind the first layer of the pickup coil and then just jump over the two small coils and wind the second layer? This would approximate what tesla did with his pancake which made it perform better. I am still in my work week so have no time to play.
    On winding torrids, I have found that I have to be very careful when looping the wire through the hole not to scrape it on the edges as they are usually sharp. Have scared a lot of wire and had to throw it out. This is especially true of the choke torrids out of old PC power supplies. Most of mine have been encased in a plastic cover which I remove to get the wire right on the surface of the torrid.
    And last but not least, I did notice on another board where the person had a conductor running the length of the tube to help light the gas. This on a 48" tube. May be an easy way to get more light for the input.

thaelin

WOW I was having a dream about this exact set-up this morning. I ended up waking up way to early for a Sunday.  I think crossing over the 2 smaller windings will fit easier and may increase performance.  I guess one of us will have to try it

Oopps you're way ahead of me I'm still catching up on pages from a few days ago!