BWJT

[kooler]

nah.. i will still be using it in my circuits.. but i will call it what it really is.. since i was able to find it..
what you see in the picture from the radioshack book is two different version of the circuit..
they said that these two were the very basic version of the hartley circuit..
so i reckon i am a backwards joule thief.. lol   

i got two other circuits i made along time ago.. so i been looking to see if someone else already has a name for them before i release them.. haha.. cause looking like a thief for the second or third time will look like a habit..      lol

i bought some very low drop out voltage regulators (0.4 volt ) so i will probably try jonny davro circuit next..

but if you have any questions on this circuit i will answer to my fullest knowledge.. which isn't much but might help..


robbie

[Feynman]

Great work guys! 

I would have never been able to get I2C bus communication with my microcontroller oscillators , or my PWM robotics circuits working if I hadn't played with Joule Thiefs. 

So don't listen to anyone tell you you're wasting your time with these -- by the way, thanks for posting that schematic.... those are from the Radio Shack project guides, right?

[the_big_m_in_ok]

So don't listen to anyone tell you you're wasting your time with these -- by the way, thanks for posting that schematic.... those are from the Radio Shack project guides, right? 

He's right.  They've been around for a long time.  I lost mine when I moved and they may be out of print?  They don't print them like that any more, AFAIK.

--Lee

[kooler]

well now i just read in a different book that any circuit that runs from 30 khz and up - - -
is a hartley osc.. if it has a dual coil and one transistor.. (aircoil)
so i don't know any more..

but yes that is a radio shack guide.. that i downloaded from somewere..
it sux that radioshack don't still run there biz the same way they did back in the 80's-90's but i reckon times change .. for the worse or good..
i am still trying to find the perfect oscillator for my device.. before i release it to public..
hoping soon..
and for whom ever is trying to get in to me i not using a firewall its a self wrote p2p program..
try python and you might figure it out.. (u know who u r .. hint  u.k )

if i can help .. let me know..

robbie

[Feynman]

Preliminary measurements may indicate Joule Thief has COP>1.  (COP = 1.08 to 1.4 somewhere).   Results pending community assessment and further confirmation.

http://www.overunityresearch.com/index.php?topic=717.msg11577#msg11577