Big Joule Theif

[Lidmotor]

Camera circuits ---been there done that

here are the tried and true diagrams or schematics of the camera transformers
.. more simple and alot with better results..
oh, 250 volts from a camera transformer is low compared to some of what you will see here..

Joule Thief Circuit Diagrams, Etc....

not trying to sound mean here but.. it seems like we build the same thing .. every year..
let me know if i am wrong

robbie

@ Robbie
You are sooo right about this. It has been done before. Over and over again. I have played around with the camera circuits also and it is old news. Just thought that Chillqueen's circuit was interesting in the way that he presented it and how he put the pieces together.
Thanks for the heads up on this and the link to the thread at OU where all the circuits are.

Lidmotor

[kooler]

sorry

i really i didn't mean to sound bad..
i always try to bring alittle something different in on the table..
i just didn't what to reinvent the wheel..
so i am sorry for sounding like a prick..
maybe i just need more sleep

out

robbie

[Lidmotor]

No No NO That was good thing!!!

i really i didn't mean to sound bad..
i always try to bring alittle something different in on the table..
i just didn't what to reinvent the wheel..
so i am sorry for sounding like a prick..
maybe i just need more sleep

out

robbie

Hey that was really helpful. Not a negative at all. Actually the circuits listed on that thread we should all look at again. Lots of good ideas there.
My farvorite saying (that was posted on the wall of my 7th grade drafting class) is: " Learn from other's mistakes because you will not live long enough to make them all yourself."
As I get older I undertand those words more and more. Life is short.

Lidmotor

[Lidmotor]

Chilliqueen replication

@ All
I went ahead and replicated Chilliqueen's last circuit and made a video of it. The main purpose was to see if I could remove the parts from the camera circuit board and then get them stuck back together into a running circuit. It wasn't easy. I went ahead and bought a desoldering tool to do it. It took 3 cameras to get it right. The first one had the wrong parts, the second one I broke the transformer, and the third one was the winner. The circuit is really nothing new but the method of removing parts and then reassembling them was new to me.

YouTube - Chilliqueen high voltage circuit using camera parts.ASF

Lidmotor

[jeanna]

I just figured out how to get a stand alone lamp stand that will work with any lamp that has an unmodified LoA bulb. The switch on this turns off completely and as there are 2 plugs available, yes, you can light 2 lamps. This is fully bright. When a second lamp shares the circuit with the other plug socket, this dims a small amount, but both lights are very bright and I believe all the spikes are being used (=fully efficient) with 2 lamps.

All I am showing here is what goes on the board and how it works.
To turn it off, the switch must be off, because the circuit is on even though there is no light.
That is because the transistor is on when the battery is in place not because there is anything connected to the secondary. Anything on the secondary is gratis.

No video today, just these 2 stills.

jeanna

[jeanna]

Big toroid availability and price

Hi everybody,

I have just received an email from the first distributor of large toroids I contacted.
They say they never quoted me a price on the large one since they never had it.
They have the 2 1/2 inch one which I recently used.
It is excellent but not strong enough... maybe for the big cfl. (But is for the 13w )
The one they have is epoxy coated and costs 12.40 so, in a way the 25 dollar minimum is easily met however the quote is for 3, so it is really around $36.
This is a retail sale and they will have them in stock soon.
So if you can get over the price surprise, I do recommend this.

=====
.....Concerning the cost and availability of OW-46113-TC (uncoated core), we do
not stock this core either, but we do carry ZW-46113-TC (and we will have
this core on Feb 05,2010). If you require the uncoated version, Dexter
Magnetics does have this core in stock. If you are able to use the coated
version, your price is as follows:

Part # ZW-46113-TC

3-24 : 12.4000
25-49 : 9.8700
============

I apologize for all this, and I hope this can help those who seriously want to make some with this.

jeanna

PS they also said the following:

With regards to OW48613TC, [The big gold] this is not a core that we normally stock. It is
available directly from the factory (but there is a high minimum order). [yup, I think $500 or $5000.]
This core is also available from Dexter Magnetics or Allstar Magnetics (they
are Magnetics other distributors).

With regards to the price, this core is a very large (and expensive) core
and it is unlikely that it will be available for the $2 range as the factory
distributor price is well above this range. If you only require a few pcs to
test your design, you may be able to request samples from the factory.

[Tectalabyss]

Way to go everyone

Hi Everyone.
I've been reading for a while to get caught back up on thing's.WOW all of you are doing great! Thank's. Tec

[Tectalabyss]

Desoldering iron

Hello All.
MPJA,Inc Has these.I own one and they work great.
40W DESOLDERING IRON
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Light weight, 40 watt desoldering iron. Built in solder sucker, 4ft, 3 wire line cord. Overall length of iron is 10-1/2". Ideal for general shop use. 115VAC/40W
L: 10-1/2 WT: .6
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Also you know how the florescent blub's have two wire's on each side.I found that if you only use one on each side they are a lot brighter,I know most of you knew this but thought I would share for any who didnt. Thank's Tec

[CosmicFarmer]

@Jeanna
Wow! Availabilities. I like that design that is available on my birthday!... Maybe I will get myself a present.

So just a little resonant math for you Jeanna, at a 3/9 turn ratio oscillator (or substitute what you think is optimal) how many turns on the secondary to recharge a AA cell with an MPSa06? (1.6v or more )

You don't have to be specific but I have a guess that the turns ratio is interesting. Just basically asking volts per turn at that core material ZW-46113-TC. What I work with has about what seems like .3 or .4 volts per turn or less.

Thank you for your private investigation into the factories!

[xee2]

low power CFL ciruit

This may not be something that should be posted here since it is not a big Joule thief. But, it is another way of lighting a CFL with a Joule thief and it only needs 22 mA at 1.5 volts to do it (and it is simple to make).

trigger coil = Ferrite High Voltage Inverter Transformer-The Electronic Goldmine

toroid = Medium Toroidal Ferrite Core (Pkg of 5)-The Electronic Goldmine

[Tectalabyss]

Thank's for sharing

This may not be something that should be posted here since it is not a big Joule thief. But, it is another way of lighting a CFL with a Joule thief and it only needs 22 mA at 1.5 volts to do it (and it is simple to make).

trigger coil = Ferrite High Voltage Inverter Transformer-The Electronic Goldmine

toroid = Medium Toroidal Ferrite Core (Pkg of 5)-The Electronic Goldmine

That's a simple and easy way to run a CFL with 1.5 volts Thank's a lot for sharing this ideal. Tec

[Lidmotor]

Thanks xee2

This may not be something that should be posted here since it is not a big Joule thief. But, it is another way of lighting a CFL with a Joule thief and it only needs 22 mA at 1.5 volts to do it (and it is simple to make).

trigger coil = Ferrite High Voltage Inverter Transformer-The Electronic Goldmine

toroid = Medium Toroidal Ferrite Core (Pkg of 5)-The Electronic Goldmine

I had the exact transformer from Electricgoldmine so I built this circuit and played with it ALL DAY!! The circuit that I have been working on over at Jonny's 'Simple SEC' thread kinda uses the same idea. On that one a 555 timer pulses the transformer but on yours the Joule Thief does it. Beautifully simple idea ---well done.
Putting the primary of the transformer in the circuit the way you did it works great. My 3.7v to 110v wall transformer running backwards worked also.
You can put a switching diode off the transistor collector and get a great BEMF charge at that point.
Thanks for posting this.

Lidmotor

[nvisser]

This may not be something that should be posted here since it is not a big Joule thief. But, it is another way of lighting a CFL with a Joule thief and it only needs 22 mA at 1.5 volts to do it (and it is simple to make).

trigger coil = Ferrite High Voltage Inverter Transformer-The Electronic Goldmine

toroid = Medium Toroidal Ferrite Core (Pkg of 5)-The Electronic Goldmine

Hi Xee2
Could you give me the size of the toroid core as I cannot find it on the goldmine website
Do you think a normal carcoil will also work as high voltage transformer?
Thanks
Vissie

[xee2]

@ nvisser

Hi Xee2
Could you give me the size of the toroid core as I cannot find it on the goldmine website
Do you think a normal carcoil will also work as high voltage transformer?
Thanks
Vissie

Toroid is 1" diameter (in small print on web page). I have used a small ignition coil with no internal resistor in place of the trigger coil and that worked very well. I have not tried a standard size car ignition coil, the internal resistor may degrade performance.

[SkyWatcher]

Hi folks, thought i would share what could be novel results, though would like to get some feedback as to whether others have seen similar effects and your thoughts. I am using 2 toroids tied together like another fellow did in a youtube video, though i am using one toroid made from steel enamel coated craft wire at about 4 inch diameter and the other toroid is from a computer psu at about 2 inches diameter, ferrite i think. And tied the 2 together with 24 gauge magnet wire with maybe 200 turns, then on the smallest toroid adjacent to 24 gauge coil i have the bifilar 18 guage self oscillator joule thief type setup, though wired bedini style. The result is that when a load is applied the input amps drop and when the secondary which is tied between the 2 toroids is shorted, it drops even further. Though this may be simply back emf fighting against my input voltage causing this, however when i put 6 leds as a load on secondary i can adjust input by lowering base resistance which increases leds brightness yet input amps stay the same and at some points, drops a little bit. At 6 volts and between 15-20 milliamps input, it lights up the 6 leds to almost full brightness. Your comments are greatly appreciated.
peace love light
Tyson