Joule Thief

[Mk1]

@jeanne

Great work, And we need that attention to detail you bring , i get the same types of reading but, did not take time as you did to analyze it , Tell me have you had a chance to try other type of coil(brass, aluminum, or iron), now we have data with copper , and you seems on top of things (essential job), it may be a good thing to see comparative, i got a feeling that many things will be discovered .

Mark

[nievesoliveras]

@jeanna

To check the real amount of voltage ac and dc from your joule thief do the following:

Disconnect the LEDs
Put the meter on ac and measure from the collector to ground (with the battery connected to the circuit)
Then put the meter to dc and make the same measurement.

It should give more than 25v to be a good Joule thief.

Jesus

[Mk1]

@nievesoliveras

Thank you Jesus.

Mark

[Freezer]

Don't know if this ones been posted already, but it uses the kodak circuit. þage 109

http://www.instructables.com/id/How-to-build-the-Worlds-Smallest-Electronic-Shock/?&sort=NEWEST&limit=50&offset=50

[jeanna]

It should give more than 25v to be a good Joule thief.

Jesus

Thanks jesus,

I am afraid I don't get anything from that. I get 0.5vdc but there is no voltage AC.

But this  is to common (red?), ground (black?) shows nothing.

but, I think it is a good joule thief, don't you?

@jesus, can you tell me how to tell which is the collector, base, emitter when it is not marked?

I got these to work by flipping the transistors around. Now I am not sure.

thank you,

jeanna