Big Joule Theif

[Inquorate]

Chaos

Sounds like a chaotic system :-) the pattern will never repeat. That's cool.

[Joit]

Sounds like a chaotic system :-) the pattern will never repeat. That's cool.

Not so bad.
Led goes stable flickering at a certain Point,
just at start it does like 1-5-1-4-1-6 Pulses.
Seems more like, it has to settle down.
But otherwise its a cool Way to make pulsed DC from continues DC.

[slayer007]

Here's another joule thief in a 2" ferrite core.
The joule thief has 20 turns and the extra pickup coil it has 160 turns,its 3 layers thick.

When its ran off a 12v battery it can light a CFL off the extram pickup coil.

Here is a video of it.

YouTube - Joule Thief Big Pickup Coil

[Lidmotor]

2" Ferrite ring JT

Here's another joule thief in a 2" ferrite core.
The joule thief has 20 turns and the extra pickup coil it has 160 turns,its 3 layers thick.

When its ran off a 12v battery it can light a CFL off the extram pickup coil.

Here is a video of it.

YouTube - Joule Thief Big Pickup Coil

Wow good one!!
I think that this is a "Must do" experiment replication as soon as I find a ferrite ring big enough. Any tips on where I can find one? I tried a speaker ring magnet but had very poor results. What is the amp draw on this when the CFL is on? Paul's rendition of this JT/CFL was drawing 800Ma at 10volts but he wasn't using secondary pickup winding. This 8:1 winding ratio seems to work just fine. Are the primary and secondary wires the same thickness?
Thanks,

Lidmotor

[DavidE]

Slayer007

Now... you are cookin with GAS!

[slayer007]

The ferrite toroids I bought off ebay.
The wire is 23ga. there both the same.
I did want to use a biger wire for the pickup but didn't have enought.

I think it could use more windings on the pickup coil allso.

[slayer007]

The amp draw with the cfl off was 140Ma to 600Ma.
With the cfl on it was 200Ma to a little over 1 amp.

It ran the brightest at 600Ma to 800Ma.

[jas_bir77]

hi @
slayer007
Lidmotor

[jas_bir77]

reading and trying your stuff.
keep up the good work
best of luck.

[Joit]

About Ratio
Maybe the golden ratio 1:1,61 is better, as Ash mentioned at the TPU? thread.
But just a guess.

[Inquorate]

@ jas_bur77



Welcome aboard!

[Lidmotor]

The ferrite toroids I bought off ebay.
The wire is 23ga. there both the same.
I did want to use a biger wire for the pickup but didn't have enought.

I think it could use more windings on the pickup coil allso.

OK Thanks. I found the 2" toroid core on Ebay and orderd it. While I'm waiting for it I'll wind a "test" coil on a steel washers core and see if maybe I can get it to run. When the ferrite core arrives I'll wind a correct second toroid and compare the two. The amp draw you listed is about what I expected. It looks good to me. No more ignition coil.

Lidmotor

[slayer007]

I wanted to see how many 1.2v AA batterys it would take to light the CFL up.
One just wasn't quite enought to light it up.
So I tried two and it light up.
Its not nearly as bright as it was off 12v but its not bad for just two batterys.

Heres a video of it lighting off two 1.2v batterys.

YouTube - Joule Thief Lighting CFL off two 1 2v AA

[redeagle]

Bucking coil joule thief

I am thinking about using a joule thief circuit to run a cap pulse to the charging battery for my bedini. I have my four pole stator from one of my fans that I had a failed experiment. All poles are in series with clockwise rotation. 30ga trigger and 26ga power. I lost count of the turns but i know it's around 100 on each pole. I know this is called a bucking coil, and i have heard that it is supposed to increase the inductance in the coil. Has anyone tried this type of setup already?

Matt

[Lidmotor]

Failed 1st attempt

I wanted to see how many 1.2v AA batterys it would take to light the CFL up.
One just wasn't quite enought to light it up.
So I tried two and it light up.
Its not nearly as bright as it was off 12v but its not bad for just two batterys.

Heres a video of it lighting off two 1.2v batterys.

YouTube - Joule Thief Lighting CFL off two 1 2v AA

Gosh I want to get your results soooo bad but I will have to wait for my ferrite toroid core to arrive in the mail. My first attempt at this failed miserably. I tried to use a stack a 3 steel washers as the core and it didn't work. You need a ferrite core. Also-- winding a toroid with 160 turns on a secondary pickup coil was hard and took along time. It ened up not even and messy and I think that contributed to the failure. Any tips on how to wind this? Is your JT circuit standard and what transistor are you using? I finnaly got the "washer" toroid to run but only poorly and got nothing out of the secondary. This is a proof of the statement: "Garbage in-- Garbage out". Follow the instructions of the inventor if you expect to get his results. Sometimes you can get away with subsitutions but not on this design.
I really really want to replicate this. Especially now that I see that it will run on 2AAs.

Lidmotor