TIME FOR A REAL OPEN SOURCE PROJECT

[conradelektro]

I just found "Joule Thief 101". This is exactly what I wanted.

http://www.overunity.com/index.php?topic=8341.0

As always, the obvious was already done by more clever people.

Sorry, I should have looked more carefully, before suggesting a project that already exists.

Greetings, Conrad

[The Observer]

Greetings,

Conrad... lot's of useless posts.   yes
               
I tried surfing through Joule Thief the last 2 days.
It would be nice if a synopsis of the current circuit designs & theory were posted every few pages.
Of course, I guess asking a serious poster for a summary wouldn't be a bad idea either.

It's funny, because after a couple years studying magnetism (Magnetic Permeability, Anisotropic Energy, Domains etc)
                I started to realize that a square type pulse would be a very interesting input to a transformer. (besides resonance)

                I do have a signal generator... but a few days ago I wished for a simple square wave circuit.
                                                             I decided to decipher what the whole Joule Thief hubbub was anyways...
                                                             Turns out, it cuts of an inductor (like a square wave) to obtain a huge back pulse                                                                       
                                                                                                                                                  from the collapsing core.
                                                             Wish granted.

Anyways we could start a thread called

Joule Thief... meaningful posts, experiments and diagrams

Or    Any Subject...meaningful posts, experiments and diagrams.

Have a  good one.

The Observer

P.S. My first change to this circuit is to move the diode (the load ) and put it across the inductor,
                                                           that way current from the battery will never go through the load.

[ramset]

Observer,
Much to my shame I have never built one of these,
If you are prepared to offer up
soup to nails
something like "the idiots guide to building a joule thief"

I will build and share !

Chet

[Mk1]

@all

There is the joule thief schematic thread , you should find there the important stuff (with link to post), but the basic circuit is the one posted above some people put a cap in parallel with the resistor , each has there own winding technique and turn count , no cores are alike unless bought at the store .

The the joule thief 101 started by resonance man , some made commentary on how to make and tune them , i did a post or two detailing my tuning procedure .

There is nothing to it , try any part you find !

The big thread is always a good place to ask question , i did read all of it and made around 1000 post in it , the best way to learn is to do it .

Before saying that people don't share schematic ask !
that doesn't count for 2 or 3 person but most will be glad to help in any jt tread , i swear .

Anyone is welcome in mine !

Mark

[The Observer]

Rams,

Looks like the Joule Thief 101 (see above)  is a good resource for basic info and theory.
I am going to study this thread  today.

The Observer