Joule Thief

[kooler]

I was just thinking the A of My circuit combined with Koolers . I can supply up to 2.5 volts at 3000 amps disposal and dispersal into his Jt .
Kooler you in ?

here is My filament lite 
Albert

sounds like a go..
but i need to buy me some more boost caps dude.. i only had two..
i blew one and my other will not take a charge now for some reason..
you know i do have a small 70 farad 2.1v cap left i might be able to do something with that..?
let me know if i can help..
i got my 1000v 10amp scr's today.. and sidac's, diacs, and smaller bridges(in size)
the reason for the 1000v scr is i had some impressive results about 960 volts thru a cap

[innovation_station]

out of room .... 


onto table # 3


i hope everyone can keep up ... 

then there is 1 table left for later ....


i have room for 3 more tables in this room alone ... 

and i gots my round one yet ... 

i can play all my toys at once ... lol

w

[unzapped]

@all I have a question for you guys... I have made several thiefs since my mag lite runner... NONE of have nearly the juice the first one has... As a matter of fact none of my subsequent JTs have even been able to fire the mag for more than a few seconds.

I have narrowed this down to the coil.

My first one that ran my maglite for hours from the primary. It was on a non ferrite core (painted) like 3/4". The primary had 11 winds of stranded core wire with plastic insulation... silver colored wires from computer a power supply. 2n2222 and 1 ohm resistor... and that is it. Juiced that 3 watt mag lite. When the power goes down a little... I have to add a magnet to the top of the toroid and it goes bright until the battery drains out. Other wise the light is dim and my toroid squeals. The magnet fixed both issues... and does not seem to effect the tranny, as jeanna suggested.

All of my subsequent coils have been combination's of real ferrite, cat 5 solid core wires, and magnet wire secondaries from the shack. Non of them have the raw power of my original. I even made a cute 1inch Rodin coil... what a pain in the ass but it looks pretty cool. no performance gains though.

I have a theory that the stranded wired primary is what made my initial coil work so well. I have to test more but the flu is upon me. And I need some sleep as I meet with our coil winder dude tomorrow!

In my quest for the perfect coil... I think 11 turns on the primary with stranded core, on a real ferrite  ring is best for the primary... This makes me wonder if the secondary would benefit from stranded wires.

Please help me to understand if you know whats going on.

Thanks
Jason

[Pirate88179]

unzapped:

I think from seeing my replications of Jeanna's circuit that you don't want any more than 3 to 4 turns on your base coil. (what you are calling the primary)  A lot depends on the transistor...we have seen different tunings needed even when using the "same" transistor.  And the permeability of the toroid is very important. 

The only reason I went to mag. wire for the pick-up coil (secondary) is because I could never get enough turns of the stranded wire as it is to large in diameter.  I use 22 ga. stranded for the base coil and the collector coil and 28 ga. mag wire for the pick-up coil.

Good luck with your meeting and I hope you feel better.

Bill

[unzapped]

I couldnt even get my last JT to run with less than 11 turns of cat 5... Oh well... the guy tells me he has a TON of ferrite stuff in stock... It will be like a grocery store! He says he has some high perm stuff and that his stuff is military spec it has to be very high tolerance... they do a ton of gov work. So this will be a great starting point... I really hope I can help find consistent "sweet spots" for our different applications this will go along way towards more successful projects and replications. Thanks for the reply and good wishes I am sure I will feel better tomorrow... it seems its a 24 hour thing.

Jason