Joule Thief

[TheNOP]

@jeanna
my example of the autotransformer might not be the best example.

Tesla is refering to his coreless transformer, it can step down as well.
but like the step up one, it need a higher frequency then those with cores.

[WilbyInebriated]

not quite a joule thief but made completely from 'junk'. a junk thief?
bulb is from a scanner that was tossed out.
circuit is a royer in resonance.
diffuser (needs work yet) is from a 100 stack of dvd's
power is a 3.7v lithium ion battery from a cellphone someone tossed out. it will also run on 2.4v from 2 rechargable aa's.
base and circuit /battery compartment is a 5 liter keg. lite beer required for the double entendre...
not shown is the circular solar cell for the top. i haven't got around to taking it all apart to add that to the circuitry.

cheers!

[Pirate88179]

Wilby:

You have invented light beer...ummm, I mean the beer light.  Great job man.  That looks very bright indeed.  Maybe I will attempt to replicate it.  The problem I see is that all of those sized kegs at the stores are all full of beer.  I would have to try to find a way to empty one and, also find something to do with all that beer. Hmmm, this is a real puzzler.  Wait!  I've got it!  It may be possible for me to empty it one glass at a time.  This will take a lot of hard work but, it will be worth it to have a light like that.  I may have to wait a bit after emptying the keg before doing any soldering, ha ha.

Seriously, very nice work.

@ Al:

Good job on the Earth battery.  Mine is still new, it will go up a bit over some time.  As for the car wheels, someone suggested that a while back on the Stubblefield topic.  The only problem I see is that i don't think they are anywhere near 100% magnesium.  Probably mixed with aluminum and who knows what else.  Still, there is a huge mass so, it may still work very well.  Your price is good on those supercaps.  Somewhere back in here, I posted a link to Maxwell (I can dig it up if you like) for their 3,000 Farad supercaps at about $100.00 ea. (can you get those at a discounted price?)  It will take me a while to save up for one of those after getting my scope.  Good luck on the lighting project.  I think I have like 5 projects going at once over here.  Maybe a 6th if I replicate Wilby's lamp.

Bill

[dog812]

Use only 1 led, because one is the same as 20 in parallel.
Add the turns carefully or add them til the light blows.
Then add resistance until the light doesn't blow anymore.

So when i am adding turns. I am adding bifilar turns? so instead of 6 it would be 7, and so on..

I can only fit 6 turns with the 22 ga.. Ill have to use that crappy 30 ga mag wire. I hate that stuff.. its so brittle.

[WilbyInebriated]

thanks bill. i think your glass by glass plan is a sound one 
yes it is very bright. i am still surprised. i used very low saturation transistors from zetex, ztx869
i am really excited about your EB projects, all of you that are doing them. i think bill's idea of using super caps off an EB is great and couple that to a jt to bump up the voltage enough to pulse charge a cell phone battery i think we can run one of these beer lights off an EB.
the sun doesn't always shine and the wind doesn't always blow but the EB is always there.