Big Joule Theif

[Vaporizer]

Hi NickZ & all,
Thanks for the links. I've seen cores listed and some do not adhere to the standard we see in this chart. I prefer seeing the "J" & "W" with the permeability ie "W=10,000" listed this way. Let's not forget the "H" @ 15,000. From what I've read the "H" isn't that popular to find and are costly. I'd still like to try one if it's 3X a "J". lol I wish I knew the permeability of many thing I've tried that have worked so well. Finding data on things like a Fuji transformer...pretty slim from what I've found looking. They still amaze me for their size vs output.

Some places reference permeability using the "AL" number. Like AL is 6.3 permeability? I haven't seen a comparison that appears to be a standard although I'd expect one to exist. Maybe just some simple thing I've missed. If anyone finds or sees the calculation to get from one to the other, I, and I'm sure many would appreciate it.

Agn, nice link. That one gets a bookmark for sure.

[Tectalabyss]

Thanks

I saw those Tec. If its just a bad brightness control on my scope I'll try a few.

Hello Vaporizer and All.
Thank you I appreciate it.
@NickZ Thank you for the Link very helpful. Tec

[NickZ]

Guys:
This is a link to the big ferrite toroids, with their values for permeability.
This was past along by Osiris at OU.com.
Ferrite Toroids | Magnetics®

[Vaporizer]

I saw those Tec. If its just a bad brightness control on my scope I'll try a few.

[Tectalabyss]

Vaporizer

Hello Vaporizer.
Hope you are feeling better.If you have the time can you please buy this coil from BG micro pictured below.When last I looked it was 1.95 each They are 3 inch OD.I have a few of them and they clean up nice I have two that I am testing JT's on but can only do voltage tests and I thought since you had a scope you could run some tests and tell me how they do if its not to much of a bother.Thanks. Tec

[Tectalabyss]

Enjoyed your video.

you know if you dont want to have to take forever winding recoveries on toroids you can just wire a regular bedini SG circuit set to oscillate from 1.5v and give that the recovery winding which is a lot easier.

YouTube - SS Bedini Joule Thief

im using regular steel as the core on this coil.
im sure there may be an influential difference in doing this but from what i can tell it works the same.. i cant light a floro simply because i dont have enough turns on the recovery, but i can light about 5 neons bright in parallel maybe more.

any ideas as to what the differences really are between this and a normal JT?

Hello Magneticitist.
I Enjoyed your video and sounds like a good Ideal Has for your question I am NOT Sure. Thanks for the Vid. Tec

[Magneticitist]

bedini JT

you know if you dont want to have to take forever winding recoveries on toroids you can just wire a regular bedini SG circuit set to oscillate from 1.5v and give that the recovery winding which is a lot easier.

YouTube - SS Bedini Joule Thief

im using regular steel as the core on this coil.
im sure there may be an influential difference in doing this but from what i can tell it works the same.. i cant light a floro simply because i dont have enough turns on the recovery, but i can light about 5 neons bright in parallel maybe more.

any ideas as to what the differences really are between this and a normal JT?

[Watson]

Hello Vaporizer and all.
Sorry I couldn't be of more help.Nickz could be right ? One thing I did want to share was BGmicro Has some great deals on Toroid s, Transistors check them out. I've bought from them and they are OK.My power has been going off we are in the middle of a winter storm I've had something like Vaporizer's Trouble but for the life of me I cannot remember what it was Thanks. Tec

I just checked BGmicro and found only five toroids, They categorize them as ferrite, but if I remember correctly, the T means it's iron core, not ferrite. Of the five, only one was suitable for JTs, the COL1074 at three for a buck (actually 99 cents), but that's not really a bargain. And the size is rather large for a JT, I stick with the 3/8"or 9mm, or the half inch O.D. cores.

I got a bunch of 1 inch cores for 5 for a dollar from surplussales.com, and they're high permeability, which is good for a JT. I can wind a coil of a few turns of heavy wire and it's got plenty of inductance.

I found that if I buy a few from a surplus sales, it's most likely they won't have any more of that type after they have sold out. And I often find that I can get parts cheaper from a distributor such as Mouser. I got the Fair-Rite 2673002402 cores from them for 12 cents apiece, and they work great for JTs.

I didn't see any transistor bargains ar BGmicro, except for the house numbered 2222's at 1000 for $13, but their leads are all chopped off.

[cikljamas]

What do you say about this :
this device drains 9 mAmps from 12 V battery, is it good result
IYHO ?

http://www.energeticforum.com/attachments/renewable-energy/7208d1292478272t-stingo-solid-state-battery-charger-battery-saving-brigtly-device.jpg

Let see if we could see this picture better like this :

http://www.energeticforum.com/attachments/renewable-energy/7208d1292478272-stingo-solid-state-battery-charger-battery-saving-brigtly-device.jpg

[Galvatron]

@ Galvatron,
That's it!

Thanks man! I got sucked into this energy craze and i'm hooked.

[Vaporizer]

@ Galvatron,
That's it!

prio,
I haven't done anything since my last post except sneeze and blow my nose.
I will read the links. Thanks!

Edit: I had read that , pulled my old BK scope out and the brightness control seems bad. I'm going to put a bridge rectifier on the core secondary and see what it reads. Thanks agn.

[Prio]

@ Vaporizer

Did you tune your toroid?

check at:

Jule Thief reply 13424
Jule Thief reply 13458, ..59

Good luck!

[Galvatron]

Actually, you can use the PNP by reversing the battery and the LED.
I saw a pic on it. I'll see if I can find it. The coil doesnt mind, its the semiconductor parts that have to flow the right direction.
The NPN is used normally because it's more efficient.

Thanks for the link. Funny thing is, I am a picture person. I'm a graphic artist and I think in hieroglyphics not words. Some kind of right/left brain thing.
Anyway here is my translation of what you guys said. Is it correct?

As for efficiency I figured from my searching people have this thing nailed down pretty good. I just want to take good notes, I'm still learning.

[Tectalabyss]

I didn't take it that way

I didn't mean it to sound bad Tec. Since most don't have a background in the field and all you see are NPN...it would be a fair assumption.
I had forgot that the efficiency of NPN's were better......lol
I would look it up, but I'm sure the purists have and thats why they are die hard NPN'ers. Even if you gave up 5% for a PNP, that's still 5%.

I read some last night and I found that every 2" & larger use 20 winds each side for the primary. 40 total. Hmmmmm.....much more than my small ones took. That will kick the current up to a workable level but the ratio will drop the overall volts. So....I may be doing a 3 or 4th layer.

@Vaporizer.I really didn't take it that way.And I am glad you made it a lot clearer than I tried to.I am here to learn and help but if I tell something thats not right I'll be the first to admit it. Tec

[Vaporizer]

I didn't mean it to sound bad Tec. Since most don't have a background in the field and all you see are NPN...it would be a fair assumption.
I had forgot that the efficiency of NPN's were better......lol
I would look it up, but I'm sure the purists have and thats why they are die hard NPN'ers. Even if you gave up 5% for a PNP, that's still 5%.

I read some last night and I found that every 2" & larger use 20 winds each side for the primary. 40 total. Hmmmmm.....much more than my small ones took. That will kick the current up to a workable level but the ratio will drop the overall volts. So....I may be doing a 3 or 4th layer.