Big Joule Theif

[slayer007]

Great Video Lidmotor.

Thats a Very Big spark from a 1.5v battery.

@All

If you dont have a SCR you can use two transistors to do the same.
A PNP and a NPN will do the same thing.

Here is a link showing how to wire the transistors for a SCR.

The Silicon-Controlled Rectifier (SCR) : THYRISTORS

[jeanna]

YES!!
The toroids samples came this afternoon and I tested the inductance of 1-10 turns and compared the W with the J permeability on the biggo and also on a smaller one that is 2 1/2 inches diameter.
I made a pdf from the spreadsheet.
Please let me know if you cannot see it.

jeanna

[Lidmotor]

Mini Lightning Maker----A Kooler Joule Thief.

@ Kooler
I built your ignition coil circuit but I didn't have the right SCR nor capacitor. It worked but not exactly right so I ordered parts. I stumbled upon another way to get Jeanna's circuit to drive the ignition coil. It was an idea from another circuit that I found which is like a Tesla coil circuit. It uses a spark gap to trigger the cap instead of the neon/scr method. It is a crude way to do it and it doesn't run fast but makes nice "mini lightning". Here is the video.

YouTube - Mini Lightning Maker.ASF

@ Slayer
The crossover between the joule thief and SEC is very interesting. I will have to try your new method.

@ Jeanna
Any luck yet finding a new source for the big toroid cores?

Cheers,

Lidmotor

[CosmicFarmer]

Hey guys !

I wound a trifilar JT with about 40 wraps on both A and B coil. Recovery wind C had about 200 wraps of fine wire. Flyback toroid. I was able to light up over 20 LED's from one single AAA battery, using a transistor I took out of some junk.

TRANSISTOR N brand
NT
2222A
33c (or 330) (or 336) the number is faded
(only one I had)
And like a smarty I blew the transistor with a 9 volt. It was working fine untill I tuned it low audible and I guess amps got out of control and I heard a POP ... no smoke. Genie got out of something. Coil's fine. Potentiometer's fine. Connections OK.

So I replaced the transistor with everything I have, different 2n2222's, MJL21194, etc, and out of all of them, none preformed as well as that A33C (or A330) . I gather its the best to use for low voltage Joule Theives, as I was able to light up a whole bunch of LED's while the rest of the transistors I tried struggled with 4 or more. The MJL did the best, lighting up 7.


So just a little discovery, I think that transistor might be the best for this application,

I'm looking but I couldn't find. Still will look though.

Thanks.

[slayer007]

In this video I have a Joule Thief running a SEC 15 and lighting a 4w CFL off a 1.5v AA battery.

The transformer is from an old PC power supply.
I have three small magnets on top of the transformer to help with oscillation.

The BEMF from the JT is going into the big cap and running the SEC 15.

Here is the video.

YouTube - Joule Thief Running SEC 15 & lighting 4w CFL.mov

[SkyWatcher]

Hi folks, This is for anyone that may try greater voltages of 12v or higher with the joule thief circuit and have problems with transistor heating, use this circuit, it is working very well.

http://www.energeticforum.com/renewable-energy/366-bedini-solid-state-oscillators-2.html#post18246

hope i did that right.

http://www.energeticforum.com/renewable-energy/366-bedini-solid-state-oscillators-2.html#post18246

[SkyWatcher]

Hi folks, Has anyone used 12volts or greater with the Joule thief circuit? Reason I ask because I cannot seem to prevent heat buildup with this circuit at 12v or higher. Bedini spoke of something called cross conduction currents and that this may be the reason for the heat, though I placed the diode from base to emitter and still same heat. Though in his circuit, running the feedback wire that normally connects to positive rail, in his it's connected to ground and this along with resistor from collector to base prevents almost all heat. Any thoughts appreciated.
peace love light
Tyson

[kooler]

ign coils X2

lidmotor
i went ahead and done a couple demo's
just to show how simple this is...
two ign coils and then a micro transformer...
the power of single cell batt or is it magic...?

YouTube - joule thief HV X2

have fun

danger high voltage

[Vortex]

Could not the toroid ferrite core be replaced with a coil?
Use a coil for the core?

YouTube - Electric motor [ 4000-foot Winding ]

just thinking
randy

[kooler]

neons??

nah.. you can do alot with this circuit
run microwave transformers ...
another jeanna style jt... for more voltage to run a third stage...
you can run it wireless like a sec...
it just needs more hz to lite cfl's
if i could get 40 more hz i think i could lite 3 cfl's of the 9-13 watt range

if you don't like a shock .. i wouldn't play with this
i still get my self.. ever once in a while
hahaha

[Lidmotor]

Thanks Kooler

@Kooler
Thanks for the quick circuit posting. This is like your 1.5 volt stun gun circuit that you posted back on page 17. I had alot of fun with that one. I figured that this new circuit used a neon triggered SCR also. Next step is to go get a million neon bulbs.

Lidmotor

[kooler]

@lidmotor & all

[Lidmotor]

Really kool experiment & video

my last video of my high voltage joule thief car coil thingy
i used jeanna's toroid setup

YouTube - joule thief hv

please don't make fun of my messy table...haha

Thanks for posting this. I watched your video about four times. What a neat application of Jeanna's big toroid circuit. It looks like you went from the toroid secondary into a large bridge rectifier, put a high voltage cap on that, and then went to the car ignition coil? Then I get lost. Does the neon trigger the car coil to fire or does the cap? If you get a chance, let us know how this last part is wired. Thanks. I am somewhat of a "Blue spark" addict and love playing (carefully) around with that stuff. I even like the sound it makes. Mini lightning and thunder ----but watch your fingers boys and girls.

Lidmotor

[kooler]

car coiling

my last video of my high voltage joule thief car coil thingy
i used jeanna's toroid setup

YouTube - joule thief hv

please don't make fun of my messy table...haha

[CosmicFarmer]

I got one of those LED chains, but it is in a net formation. Un even number of colors and the last one at the end does have 3 or more connections. Knowing that might have saved me a day of noodling around ;-)

Interesting to have a wall of light to play with