Joule Thief

[jadaro2600]

@ All

My latest goal is get efficiency 1 or >1, - not lighting a LEDs. (corrected for Jeanna)
I think , I'm close to gadgetmalls idea. He was trying to charge another battery, I'll try to selfcharge running battery.
I don't want to do traffic on this tread.
I want to move to gadgetmalls Second Stage Joule Thief Circuits. If nobody against? , somebody is inerested in my works ?
If not, - I can be  quiet.
Now this tread is still.
I wish gadgetmall comeback.e

Keep in mind the notion that loading the circuit will create different operating conditions that not loading it, I've found that without a load, the circuit consumes more energy.

[tysb3]

[quote A=jadaro2600 link=topic=6123.msg236456#msg236456 date=1270518993]
Keep in mind the notion that loading the circuit will create different operating conditions that not loading it, I've found that without a load, the circuit consumes more energy.
[/quote]

Thanks, jadaro2600,
I'm familar with  "2 connected cans" tricks.
Soon I'll finish first experiment of brake OU from first assault  )))) and post some results.
It's nothing special but I'll withstand from it.
I still have tooooooo mach place for improve - 2 JTs !!!!!    )))
seconds JTs  coil pull some amperage..... (that's for reserve)

[Mk1]

@all

I made some videos of the anomalies found while working on my new coil ...

http://www.youtube.com/watch?v=cJsz2Kd4R7o&feature=channel

http://www.youtube.com/watch?v=NfT83_X2B1M

http://www.youtube.com/watch?v=A2r5npBpWpg&feature=channel

[jadaro2600]

Things got quiet here,

Hopefully I'll have more time to work on some alternative circuits in May ..after all these finals get done with.

[conradelektro]

To the Joule Thief Masters in this Forum!

I just built my first Joule Thief (and I know you moved way beyond that beginner level).

May be one of the experienced Joule Thief experimenters finds the time and has enough pity to give me some advice?

Attached find a cope shot and and some information about my Joule Thief.

I wounder whether the 15 KHz indicate that everything works well? I only get 2 Volts over the LED from a 1 Volt AAA battery. Chanell 1 is the measurement over the LED and Chanell 2 is the voltage over the battery. It does not work with a 0.5 Volt battery, but a 0.8 Volt battery is enough to light the LED.

The Joule Thief is now running about 4 hours and the transistor 2N3904 stays cool (AAA battery about 1 Volt).

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The big question:  Did I put too many or too few turns over the Toroid?
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Greetings, Conrad