Big Joule Theif

[SkyWatcher]

Hi folks, i've been watching some of your videos kooler and comments and such and have a better understanding.
Also, I have noticed the volts on my batteries tending to climb as well.
I plan to try some of my ferrite toroids next.
peace love light
Tyson

[SkyWatcher]

Hi kooler, thanks for the reply and suggestions.
I tried hooking another green led across the secondary and it did light up, but it seemed to spilt the output between the two leds. Which made the light dimmer.
I'm not sure if your suggesting changing something in the circuit or not connecting something else in order to run the led off the secondary at similar output levels.
At any rate this sure seems promising.
I wonder if this led can be lit at the brightness I'm seeing going direct to battery with resistor or some other way, while using such low power.
338 microwatts sure seems low power to be getting this brightness, that's why I'm wondering if this can be done in some more traditional way or this is something special possibly.
Have you tried powering anything else with this setup?
I plan on making more tests with this circuit, sure seems worthy.
peace love light
Tyson

[kooler]

skywatcher
looks good..
the cap is the freq..
and different transistors make huge jumps in draw..
the tip3055 has brighter flashes than any transistor.. when its turn down to microamp range.. but their getting hard to find..
if that spool of wire you got is trifillar with a core you can probably light the led on the secondary..

robbie

[SkyWatcher]

Hi folks, Hi kooler, thanks for sharing your latest work with your BWJT.
I built the circuit using a trifilar coil i had made before with 24 gauge which has a cylinder ferrite core and each coil strand is 4.2 ohms, of course only used 2 strands.
I used a green christmas led using 2 AA nimh at 2.7 volts.
I used a 330 picofarad capacitor.
used a 1 megaohm resistor.
used a 2n2222 npn transistor.

It's oscillating, since i can't light the led straight from the battery using the 1 megaohm resistor.
It is using 125 microamps at the 2.7 volts for 338 microwatts.
I'd say the led is 15-20% of full brightness.
Here is a pic of it running



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peace love light
Tyson

[kooler]

just wanted to see how low i could light a led..



YouTube - microamp bw jt

[mbelur]

I have made the big joule thief successfully I have BUX48A as BUX80 was not available. I stay in a village and the power outing is very high, hence i wanted to know the following information:
1. When I operate the big joule thief on 6v smf what is the maximum load it can handle?
2. What is the protection I can use to protect the O/P and the battery?
3. How can I get max benefit from this circuit in the village?

Joule thief is not producing sufficient current when powered with 12v battery to light 25w bulb.

I have made a 6v smf battery charger that was given in LED automatic emergency light. There is not way to read the status of the battery in this circuit. Please provide me with a simple battery condition indicator circuit that i can use with this circuit.

Best regards
Belur

[mbelur]

Big Joule Thief

I have made the big joule thief successfully I have BUX48A as BUX80 was not available. I stay in a village and the power outing is very high, hence i wanted to know the following information:
1. When I operate the big joule thief on 6v smf what is the maximum load it can handle?
2. What is the protection I can use to protect the O/P and the battery?
3. How can I get max benefit from this circuit in the village?

I have made a 6v smf battery charger that was given in LED automatic emergency light. There is not way to read the status of the battery in this circuit. Please provide me with a simple battery condition indicator circuit that i can use with this circuit.

Best regards
Belur

[SirFerret]

Hello SirFerret & All.
@SirFerret.
Sorry for the delay Haven't been feeling well.I have not tried the CFL I mostly work with led's and lower voltage's due to my grand kid's.I hope you had good luck with your projects.and again sorry for the delay I will include a picture of one of my coils. Tec

@Tectalabyss

No worries, I've been busy feeling like I've been run over and trying to keep my almost 6 month old happy. This is no simple task, I assure you.

Anyway, I haven't had time to try either of them out, though I did strip one down already. I'm hoping to get some tests done with it sometime today. Looking to try out my 2N3904 and 2N3906's before I change over to the trusty Tip120 Darlington. (Uses a bit more power, but I don't have to worry about burning them up.)

I figure I'll start off with my 26g wire and go with 4 wraps base, 10 trigger and see what I can get out of 10 turns on the secondary. I wish those LED's I bought off of EBay would hurry up and get here from China, that way I'd have something fun to play with and wouldn't have to worry about the extreme voltages needed to light a CFL.

@All

For anyone interested, I had a DeWalt 18v battery charger I recently pulled apart. This thing has about 8 2N3904's and a couple 2N3906's in it, along with a load of 4007 diodes and a couple of really huge diodes as well. If you have any friends with fried chargers or can find them at garage sales, I'd recommend grabbing them up. Plenty of transistors and diodes in them to make it worthwhile.

Later all,

Tony

EDIT: Had the wrong number on those transistors, 3094/6 == 3904/6.

[Tectalabyss]

Sorry for the delay

Thanks for the info Tec. I'll give a go with maybe 10 windings and see what kind of output I get before I strip it. Will have to wait though, maybe until the weekend...
How many wraps did you wind up putting on it before you could light a CFL?

Thanks in advance.

Tony

PS-Sorry I forgot to sign original post.

Hello SirFerret & All.
@SirFerret.
Sorry for the delay Haven't been feeling well.I have not tried the CFL I mostly work with led's and lower voltage's due to my grand kid's.I hope you had good luck with your projects.and again sorry for the delay I will include a picture of one of my coils. Tec

[SirFerret]

Hello SirFerret.& All.
I Have tried them both ways.I've not had any luck with the windings already on them.They clean up real nice.They are already coated.I've gotten them to work with 1.2 volt AA's and even 12 volt using a mje3055t Transistor.Good Luck. Tec

Thanks for the info Tec. I'll give a go with maybe 10 windings and see what kind of output I get before I strip it. Will have to wait though, maybe until the weekend...
How many wraps did you wind up putting on it before you could light a CFL?

Thanks in advance.

Tony

PS-Sorry I forgot to sign original post.

[Tectalabyss]

Tried them both ways

Has anyone tried the Thick Toroid from BGMicro yet? I received two of them yesterday but have not had the time to do any testing as yet. I'm wondering if the existing windings will be helpful or if I'll need to remove them and start from scratch?

Hello SirFerret.& All.
I Have tried them both ways.I've not had any luck with the windings already on them.They clean up real nice.They are already coated.I've gotten them to work with 1.2 volt AA's and even 12 volt using a mje3055t Transistor.Good Luck. Tec

[SirFerret]

Thick Toroid from BGMicro

Has anyone tried the Thick Toroid from BGMicro yet? I received two of them yesterday but have not had the time to do any testing as yet. I'm wondering if the existing windings will be helpful or if I'll need to remove them and start from scratch?

EDIT: -- Tony
(Forgot to sign. *sigh*)

[SkyWatcher]

Hi folks, I finished winding my first test bifilar coil that is wound on a wrapping paper cardboard tube and it slides easily, so maybe that could be useful for possible resonance tuning. First test bifilar coil is 18 gauge magnet wire and each coil strand is 600 milliohms. I will be testing this later today and see if it lights up a cfl or other type of fluorescent bulb. Here is a pic with the ignition coil secondary inserted into the primary bifilar coil tube.



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peace love light
Tyson

[SkyWatcher]

Hi folks, Hi vaporizer, thanks for that information, then i hope i'm fairly safe as far as arcing without having oil, since i don't think the coil will be outputting anything like what 12 volts input does. We'll see.
Hi NickZ, that's a nice setup you have there, what level brightness would you say the leds are at. As far as the Adams motor, I decided to revert that motor back to air-core, though i made the coil/cores more to adams specs, i still think there is something about the aircore motor with dual rotors enclosing the coils that has possibilities that others have not realized.
I found some cardboard wrapping paper tubing that fits perfectly over the ignition coil secondary and cut a few tube pieces, this way i can test different bifilar coil wire sizes and resistances and i can slide it back and forth on the secondary coil for a possible tuning method. I'll let you folks know how it goes.
peace love light
Tyson

[NickZ]

@ All:
Thanks for reactivating this thread, I was starting to miss it.
@ Sky, I think that it may be time to make our own caps and batteries, as they are both expensive, and hard to find the right ones.
Any luck on your Adams set up?
I've been working on the Captret-Jt, now lighting 12 leds without discharging the batteries by more than a volt or two. Some versions have been running for a week lighting a single led, or several leds, and are still at it.
I'll soon be making an antenna battery set up for testing on the Captrets. More on that later...
So, guys, lets keep this thread alive!!!
NZ