Joule Thief

[xee2]

Germanium transistor lights LED with only 0.25 volts. Should work with most earth batteries. LED gets brighter as voltage and current goes up.

[Yucca]

Nice circuit xee2, wow 0.25v, very sensitive transistor!

@all
here's an experiment one of you might like to try if you have a spare toroid and time permits.

Take a toroid and cut through it in one spot using a dremel with a cutoff wheel on it.

This will increase core reluctance and should give better performance on a JT because a JT is a simple flyback trafo. There should be considerably less core losses and more power out the windings for the same supply power.

Also it will also allow you to wind say 100+ turns of 32AWG as a third HV output coil easily because you can then just quickly wrap it off the spool inserting each new wrap through the gap without having to thread the whole length for each wrap.

[innovation_station]

Nice circuit xee2, wow 0.25v, very sensitive transistor!

@all
here's an experiment one of you might like to try if you have a spare toroid and time permits.

Take a toroid and cut through it in one spot using a dremel with a cutoff wheel on it.

This will increase core reluctance and should give better performance on a JT because a JT is a simple flyback trafo. There should be considerably less core losses and more power out the windings for the same supply power.

Also it will also allow you to wind say 100+ turns of 32AWG as a third HV output coil easily because you can then just quickly wrap it off the spool inserting each new wrap through the gap without having to thread the whole length for each wrap.

NICE ...  BROS ...


now im a halft to try it ...  i got a cut off wheel some where round here ....

it does sound much similar to the gap in the flyback core .... 

ist

im still trying to find something simple and cheep to hold my horz... electrode ... i wish i never scraped those wire clamps .... they would have been perfect!!!   but it was copper run and i was broke ...  O WELL...

something will come along ...

i have never tryed to cut a feroite core yet ...  i thought it would be a real treat to cut ... but i dont i know never tryed ..  i will today...

ill use a goldmine 5 4 a buck ones ... 1"

ok i just did it ...   10 000 times easyer than i ever thought ... 

i used a drill as my dremel is blowen up ... i worked it a bit hard in the past .... 

[stprue]

Are you looking for this?
I think this is the transformer Freezer used a while back. I always wondered why he made his light then left. Oh well, different styles.

Are you looking to find it? or are you wondering if I would try using it?

jeanna

I have one of these and it works great.

[stprue]

I think you have a lot more ingredients in your circuits than I do.

So, maybe if you start with a parts list we can see if I really do have the same ingredients as you.

I have noticed your numbers, but I can't figure out your circuits. Your photos are great, but they need labels if you are going to get me to follow you. That is asking a lot so I don't usually ask someone to do labels, but I am usually lost.

About the dmm dipping and changing values, we found this to be fairly normal behavior with these kind of experimental circuits. I'd say don't worry.

Get some sleep, and please make me a parts list, and we will see if I can replicate this. If that is what you mean by helping you??

jeanna

Sure thing! and thanks for the help.