Joule Thief

[innovation_station]

hello everyone and older al!!!

just thought i would clear up any confusion over what im building currently ...


there is a total of 6 aa batteries in my unit and 2 are dead ones ... that supply the entire unit ...  4 are rechargeables ... they get recharged 

4 more are 3.6 v cordless fone batteries...  they are also recharged at a FAST RATE OF SPEED .... after running all night ... they are full....

and are not drainging ....they power the 6 mk2 rings...

so i fiddled with it for a bit last night ...   but not enough

I CAN SAY I DID POWER A MK2 FROM A RECHARGED BATTERY FROM THIS SYSTEM ....

AND IT SPITS OUT 110VDC.. X4 PLUS THE JT RETURN...

from the aa i recharged ...  did not apear to work well from the fone batteries ...  it was late tho ...

i play later on and get it running proplery .. 

ist!!

after rechargeing all night long my dead supply batteries still have tonnes of juce in them 

i call them dead cuz they came from the cameras    ...  they are used but still have well over 1v in them

agin i was only rechargeing batteries not powereing the out put rings...  at the same time ... 

[mikem_2au]

I found an article on how to make a JT, it also had a WARNING "be careful, very addictive".
A year or 2 later, i think it's time to admit that i have an addiction.

been following this topic for a while now, think you are all doing great things, thought i'd say hi

At the moment i only have a few iron powder torroids wich don't perform well, but have been
trying everything to get the most out of them, then
After reading a post from @gyulasun on page 324, wich i'll admit i don't fully understand.
( i have trouble understanding somthing i can't see e.g. the JT, i see the light come on,
i can't see  the magnetic field, the transistor switching, the capacitor charging/discharging,
and so on, ) I thought i'd try something different.

I started with 16 turns primary, 4 turns secondry wich gave me 7vdc 12ma and 42ma draw from battery,

I then wound a third winding, one end went to the collector after a diode, and the LED went between
the emitter and the other end of the third winding, after some tuning i ended up with
8 turns primary, 2 turns secondary and 12 turns for the third winding,
results were - 21vdc 27ma and 39 ma draw from the battery.

Happy with this and not having a ferrite torroid to try this on i decided to add another 6 turn winding
to a fugi transformer
the Existing 8 turn winding ended up as the primary, the new six turn the secondry and the
third winding, well i couldn't count them,

this lit up an un-modded cfl, but only just, and with one hand holding some foil with it beeing attached to
the emmiter, but this was enough to make me smile

i'v attached a couple of pictures, the cfl wasn't as bright as it looks in the photo,
also a edited diagram, first time i have done this, i think it's rite.

must get some sleep now.

[innovation_station]

AWSOME !!!!!   POST!!!!!! 

WANNA KIT IT ?!?!?!?!  LOL



I WANT OPENSOURCE KITS!!!!!!   LOL !!

BRING IT ON!!!!



great job !!

anyone else out there hideing ....  i know you are there ..... 


this is quite addictive lol  been at it a while now 

ist!!

[resonanceman]

I  got  some parts  in

I  now  have  the  right  transistors   

I  got  some N3904s and  some N2222s

My black toroids are not here  yet but  I  have a few that I pulled out of a monitor.

I  have  a  Jt   with a M3904  running ........now  I can  start seeing what  I can  do with it




gary

[dog812]

Is it possible to run 
21 RGB LED's that require 3.6V/30ma on a single AA rechargeable.
I make LED Hula hoops for my gf and her friends.. I am trying to make them cheaper for the girls. You can see my process at my site.. http://ledhulahoop.com

I have been reading and reading but no deffinite parts list to make what i need.
Does it matter what size the ferrite is for my application? how about resistors.. do i need different ones?
How long will the led's stay lit for on a 2450 mah battery.. 

any help would be awesome and greatly appreciated.