Joule Thief

[Mk1]

@dog812

Find a cheap one for now . It should have at lest volts and amps .

You did some great work so far , i cant wait to see you with tools , you will be flying !

Mark

[gadgetmall]

I just made 2 similar JT's one basic with 6 paired windings, 2n2222 and 1K resistor.. and one using the same # of turns , same torrid size.. everything but using this schematic.. http://www.instructables.com/files/deriv/F2I/ZRXQ/FR0ZHOS5/F2IZRXQFR0ZHOS5.MEDIUM.jpg  adding the 22n cap..

I didnt notice any change in brightness..  And i have no voltmeter yet.. so i dont know if it is any better.

Still searching for way to light these led's up brighter.

Hi . you 2n2222 is not very good amplifier . try a 2n3904 in place of your design .


@jeanna .HI !! Very Nice out of the box thinking . I like it . It Does appear to have GAIN . Hey More leds brighter and less ma is GAIN . You can't get that with a regular one transistor Voltage amplifier circuit . look at all the experiments in this thread no way . I am waiting for some torroids of a know value and will replicate ya !! .

@Mark . Send me one or at least pm me about Em . Nice work
Al

[jeanna]

Yah makes sence.. haha.
What is a good cheap meter to get?

dog812,
If you are in the states, allelectronics has one for $9.00.

I am glad to see you have 2 similar toroids.

Did you say you wound a secondary on your toroids?
and the leds?

I was playing with caps a little and sometimes, they really do make a nice sine wave out of a nasty bunch of spikes, but then, the voltage takes a big hit.

Do you have a pic so we can see? We like looking at people's lights! 

cool,

jeanna

[jeanna]

@jeanna .HI !! Very Nice out of the box thinking . I like it . It Does appear to have GAIN . Hey More leds brighter and less ma is GAIN . You can't get that with a regular one transistor Voltage amplifier circuit . look at all the experiments in this thread no way . I am waiting for some torroids of a know value and will replicate ya !! .

Oh wow thanks gadget,

(known value... you mean not out of the junkyard... oh.  )
It will be part of what I am doing, but just get a few that are the same from  the goldmine, (NOT the bad blue or hi perm)
The medium is ok. That is the ferrite that was in the 1st tier that may have been responsible for melting the black plastic on the neg battery lead. They are 5/$1. The minimum order is $10, so pick up some filters and a meter or buy some leds too.

yeay!

thank you,

jeanna

EDIT the "same" part is not really necessary, but it could get really wild if you use too many different components and turns and turns ratio...

[Pirate88179]

@ All:

Yet another cheesy video I just posted on youtube:

http://www.youtube.com/watch?v=XYhNw6SuTfA

I call this one "Wilby's Bird Experiment".  Here I use the standard JT circuit with ultraviolet leds attached to plastic tubing coated with black light paint powered by three supercaps energized by an AA battery via Wilby's Bird. (The legendary drinking bird)  This allows me to pulse the supercaps without spending ANY energy as the bird is self-energized through evaporation.  It is still running in my kitchen and I love this little bird.

Thanks again to Wilby for his very inspired idea.  I still have some tweaking and adjustments to make and I am not convinced this will make the battery last longer but, it is cool and it just might.

@ Jeanna:

Very good work over there.  Thanks for posting those concise instructions on your experiment.

Bill