Joule Thief

[jadaro2600]

I I wound yet another toroid, the largest one that I have and used a NTE210 transistor ( higher voltage and current )

Using a previous setup, I was only able to get a 12 or so volts out of a 1.5v input, 50v out of a 2.5 volt input and 240v out of a 9v..which is when the transistor started to heat up...I was indeed able to light up a 6 inch florescent tube with the 9v battery - but that's just not what this thread's about.

I need some tips on winding the toroid to achieve maximum volts from the 1.2 volt rechargeable battery.  I only tested the above to prove to myself I could get 200+ volts out of my transformer.

I suppose what I need is the mk1 or 2 - I've tried this method, but not in locations like are marked in the other thread pirate posted.

*edit; at one point the toroid was singing - but it went away after adding the capacitor.

[hazens1]

You want extreme voltage from a single AA battery?

Just grab the coil from a Gas Grill Ignitor like this one at Walmart..

http://www.walmart.com/catalog/product.do?product_id=8587363#Features+%26+Specifications

I think this generates 25k volts from a single AA.

[electricme]

@ist Post 365,
                     Ha ha ha, heeeee haaaa, you are right ist.

Very early on, way back in the beginning of this thread, I mentioned about using a valve with the JT, in other words, replace the transistor by a valve.     

It will need a hi voltage (400v-600v)on the grid or plate, well some of us have been getting JTHT, but no current, so it could be useful.
We probably will need a valve with a 1.5v heater, this will need some research.
I can see it now, Valve radio powered by the Joule Thief.

We need a chassis, which can be a flat board, say 12" by 12" or there abouts to attatch the workings to.
We will need a valve
We will need its matching vave base, as valves are a plug in device.
We will need "condensors" haaaa, capacitors
We will need resistors
We will need to research up on valve circuits, so I sugest SILICON CHIP magazine for a start, they have had a valve radio restoration section for decades.

Last year, I contacted a number of valve "jocky's", got a couple of replies, but didnt present them as I thought no-one was interrested.
   
A VALVE does the same thing as a Transistor, or, if correctly said time line wise, the Transistor does the samething as a VALVE.

Valves have a "A" battery and a "B" battery.
Why!!!!!!

One battery powers the filiament's the other supplies HV to the valve plates to attract the electrons off the cathode heater, arrrr ha.
I'm getting wayyyyy ahead of you all, cmon ist, lets get started on this.

OK if there are any valve jockies reading this, please, if you know of a valve whos filament is 1.5v or lower, please post the valve number, where to get it and how much it might be to buy. 

ist, would a microwave valve work?

I had better get back to reading up the posts, I'm like 3 days back.

jim

[Koen1]

Alright people, I'm back

So, I did a little testing this weekend.
Built a fresh toroid, and wound 6 coils of 4 turns each on the ring core.
Two of these are placed exactly oppositely of eachother,
these were used as the basic two JT coils.
The other 4 coils were pickup coils.

Output per pickup is too low to light a LED. If I connect 2 of the
output coils in series, they will light LEDs. If I connect all 4
output coils in series, they will light an equal number of LEDs.
If I connect a capacitor to these output leads via a rectifier bridge
made of 4 Germanium OA90 diodes I see voltage accumulate
on the cap, quickly rising to 25V.
If I connect LEDs over the cap, I get a total number of bright LEDs
that is just about one LED more then what I can light from the
secondary directly, which in turn is about 1 LED more than I can
light from the JT base circuit if I don't use the pickup coils.
With the LEDs connected over the cap, I do see a constant cap
charge of about 5.5V while the LEDs are lit up.

This clearly shows that the voltage of the pickup coils is related to
the number of turns they have in respect to the number of turns on the
JT coils.
It also seems to indicate that, although the individual coils clearly do not
produce enough output to light the LEDs properly, the pickup
coils wired in series and via diodes to a cap do appear to enable lighting
of an additional LED.
I cannot conclude that I am getting OU at all, based on this. I cannot conclude
that there is definately no OU going on either.
All I can conclude is that I am getting voltage on the cap, but that could just as easily
be fully accountable since I'm not measuring the input wattage and output wattage yet.

I have now shorted a rechargeable battery so that it should be empty when I get home,
and then I plan to hook the empty battery to the capacitor and a half empty one
to the input side and just leave it to run untill the source is empty. Then I'll check how
much charge the other battery has, and if that is more than the source had at start,
then there might be chance to conclude possible OU effects.

Another idea I had but haven't tried yet, is to not use the battery connection all the time.
Say we were to charge a capacitor from the battery, then disconnect the battery, then
discharge the cap over the JT... If we do that once, the output capacitor should now
store a charge, and it should be easy to see if the charge is higher or lower than the input
charge, as long as we use two identical caps... right?
I suspect this will not work, as I suspect we really do need that battery amperage for the JT
transformer action to work properly...

Well ,anyways, so far I'm still not seeing any power gain, just seeing one or two more LEDs
light up and volts stored on the cap, but since the input feed is not being monitored
there is no way to relate it back to the input so no way to be sure that we're not just
feeding all that output in from the battery.

I'm starting to feel a little disillusioned here... Here IST and a few others have been getting very
excited over their output, seemingly suggesting that they're getting more out than they're
putting in, but after all this time and all my whining there's still only those claims by
the same few, and I'm not seeing anything of the sort in my little tests.
It can't be that difficult, can it? Should be quite simple: either more comes out than goes in,
in which case it is a mystery why nobody has yet charged more batteries than it takes
to run it, or a little less comes out than goes in, in which case it is very understandable
why nobody has yet charged more batteries from one source battery.

So what is it now?
Is ANYONE really getting out more energy (so that's joules or watts and not just volts)
than is put in with any form of JT-based circuit ??
Or was that all just hot air?

Kind regards,
Koen

[electricme]

@Koen

I'm going to puff a bit of hot air HOT HOT HOT lol

If you want to get some useful energy (wattage or Amps) from a JT you need to parallel up JT.

Ie, make a dozen identical JT's
Connect all the transistor BASES (b) together, all other connections go to each seperate JT itself.

Then each seperate JT has to have it's own secondary.
Put a rectifier on each secondary output, you will need say 12 bridge rectifiers.

Connect all the negative outputs together
Connect all the positave outputs together

That will give you Output GRUNT

Now, you will have OG at whatever the secondary is supplying.
To get more, wind extra seperate secondaries with fewer turns, this lowers the voltage to what ever amount you want.
Play with it.

I'm going to bed, my eyes are droooooooooping, my mind is sloooowing downnnnnnnnnn.
I tink I is tired out.

Its a bit like pluging a power pak into the power point, it puts out say 12v at 1 amp
Plug in another plugpak next to it, then connect the outputs in parallel, you have 12v at 2 amps now
Do the same with a third one, now you got a 3 amp output
Do it again with a 4th one, now you got 4 amps output, but still at 12v

Hope that explained it.

night night all

jim