Joule Thief

[flathunter]

great work going on here.

I have a question for any one that has an answer. when tuning a JT i check the amp output from the emitter and adjust the base resistor for lowest output. ok no problem doing that. but should i use a new batt with 1.5 or 1.2 volts or use a batt that is almost dead (.65 volt) to get the lowest output. or will it make a difference.

I am trying to get a 5 turn MK2 no secondary's working and tunned. also i am using a 2n2222. because i can't get a 2n3904 to turn on any led. so i must be doing something wrong with that one

Have you tried checking the transistor emmitter, collector connections?  If they are the wrong way round, maybe thats why your 2n3904 aint working.  Just a problem I ran into at first - someone else mentioned they'd had the same problem, so i turned my transistor round, and it immediately worked on a typical JT.  I also have the 2n3904, toroid from inside a monitor, 7 bifilar turns (no secondary), , and i can put at least 40 LEDs on it, and they last about 24 hours.  I use an AAA old battery from my mp3.  I have a shelf with loads of old ones that i just hadnt thrown in the bin, and then I saw this thread and thought, waste not want not!!!!

Now I'm totally hooked    Thanks everyone for keeping it real!  Will be getting my disposable camera to try some new ideas soon.  If anything compoletely amazing happens, you'll all be the first to know!

[nievesoliveras]

...

jesus   no ou eh !!   lol

oh yes little tricks ...  there so many ...  need feed back .... so i was wondering ...

ok we put in 1.5v and we can get out  diffrent voltages ...  so let us do this ..    thake the out put and send to a cap ..  put a sw on the cap to fire a second jt .. on the same ring ..  or it could just be a primary coil ... and you could have more than 1 hence ... 2 secondaries 1 jt  1 additinal primaris ...    and a output coil ...

i was thinking litz style wire ...

ist

the problem is i have 1 million ideas and can not keep up

yet i make another i used the little inductor in the cfl boards ...  it has a few thousand winds really fine wire on a feroite bar.....  so i wound a bifillar jt over it 5 turns 22 gage...

Maybe it is something easy to do, but I do not understand it.

Jesus

[innovation_station]

anyone ever take apart an old vcr someone told me there was a supercap some times in them round 2f

any how i took 1 apart no supercap  but i found just an awsome motor coil in there 

imagine 12 coils on 1 ring pushing outward ........   sheesh

pull the old marco trick   

trow a collector over it   

lol

it is as apears to be 3 phase

ist

i did find a small super cap in a vcr!!!!!   lol  it reads nec 5.5v 0.047f

so it is true they are there but  they are small i have not found 2 f  but it is a start ...  im sure it will find a use ..

[MrMag]

Holy Crap guys! I go in for knee replacement surgery and when I get back I have a TON of pages to catch up on.
Wat to go. It sure doesn't look like this thread is going to die soon

[Pirate88179]

@ All:

Just got back from work and I thought I would post some pics.  I made this contraption last night.  It is simply a piece of clear plastic tubing wound into a coil shape, ala CFL, and filled with water.  It is powered by a JT toroid circuit driving 2 leds inserted into the ends of the tubing.  Since I post all of my victories here, I thought I would post something that did not work out as well as I had hopped.

I can switch to the 265,000 mcd leds and maybe trim down the length of the tubing.  I think this will help a lot.  Anyway, I am always thinking but I never claimed that all of my ideas are good, ha ha.

Bill