Joule Thief

[electricme]

@ The NOP and MK1

Over driving the base.

I could be wrong here and please put me right if you think so, but I think we need to look for a AVC or Automatic Voltage Control circuit to incorporate into the JT.

As our battery gets lower, so the amps to drive the circuit get higher, and the volts get lower further, its an automatic thing, but the output gets lower as well.

A bit like the AVC in radios, (Automatic Volume Control), once you set the volume, this circuit keeps the volume pegged at that level, it only gets lower, if the threshold is passed by the setting pot, (the volume knob), because the battery got even lower..

If we could come up with a small component circuit, to compensate for this, then we might be able to get better results.

jim

[electricme]

@altrez,
LED's in parallel and in series, there is a reason for connecting them this way?, yes, well if using them in the preferred manner.

The LED is a current working device, one has to limit the amount of grunt being supplied to it, or if the LED is over supplied, it well have its life reduced, or it will fail.
To try and stop this hapenning, a resistor is placed in series between the LED and the source of the power.

Now, if you have connected your LEDs in parallel, you may have noticed one or two have different light output, this is becaue they are not identically made, or not derived from the same batch, so to get an even brightness, you should put a variable resistor between the LEG and power source, and brighten it until it shows the same brightness. Measure off the resistance with a DMM and solder in a fixed resistor of the amont shown on the DMM.

LED's in series are another matter, generally 1 resistor is soldered at the end of the "chain" of LED's.
The LEDS should show an even brightness, but still could be effected by some being not so exact as others.

This being stated, I have also noticed that LEDs seen on the Joule Thief circuits, seem to operate very well indeed without resistors, even though in several cases here, they seem to be operating far in excess of voltages presented to them, they also seem to display different properties, under the power of the JT, which flys in the face of my above statement.

I can have a LED turn on in one direction, then flip it 180 degrees, and it will still work in the other direction.
The trick is not to be too concerned about this hapenning, as amazing as this may seem to be, but I think it is because of the very hi frequencies the LED is subjected too. DC and AC behave very fifferent to the normal DC and AC are all used to in everyday life, and this JT brings confusion when trying to explain this.

Just accept it and flo with it, see if other devices work differently.
For example, someone recorded they had a electric motor run clockwise, then it slowed down, stopped and started up going anticlockwise, hmmmmm time lol.

Had an idea, oppps,,,,,, the tiniest electric motor I have ever seen is on one of those radio controlled infrahred helicopters, it is the tail rotor with a tiny prop on its shaft, this might run on a earth battery copper rod setup....


Sorry about taking so long to reply.
jim   

[WilbyInebriated]

regarding being able to flip led polarity, here is a neat experiment.
i'm assuming the use of a 1K resistor on the base of the transistor.
raise the resistance on the base of the transistor to 2K, now flip the led, is it brighter, dimmer or did it go out?
lower the resistance on the base of the transistor to less than 1K and repeat led test.

[Koen1]

Google : Eddy current

The coils also induce electron movement in the core material (considered as core loss)

If the core material is electrically conductive, like pure iron for example, then yes.
But if you're using quite nonconductive ferrite cores, then there shouldn't be
any Eddies. Obviously.

[Koen1]

@all,
Gadgetmall has been very very sick, I last heard from him about a week ago, since then nothing.

Yes, starting to worry here... If anyone knows what's going on with him, please let us know?
Bill? If you manage to phone him, please tell him we're all quite worried about him?

@ Koen1,
240v query.
How did I know the difference between both power supplies? Well it's hard to discribe, this is over 50 years ago,.

All I could say is I felt the power in Lae as smooth and effective, the power in Australia felt like it was harsh, as though it had a wild beast inside it, with a sharp saw tooth about it, like I said, difficult to discribe.

Hmm yeah well I asked because I also got the impression that the grid output in some places is less "smooth";
I got the impression that the "harsh" current that some countries have is more like the non-smoothed AC
that many inverters put out, which is why I mentioned it.
I find that a bit odd still, for the places that had such "harsh" grid output that I visited also use high tension
lines to carry the power to the substations, and the substations look very similar to what we have around
here so it seemd strange to me that they'd put out so different a type of AC...
But then again, it could just be a matter of crappy workmanship... badly built transfomers or something...

Koen, your post on P(376) you mentioned also that the voltage is averageing out at 230v, funny that because in Australia this is also occuring, there was an article in the Silicon Chip about this, I wasnt aware of this situation until I read it last week, so I am confused like you hmmmmm, wonder whats going on here? Big picture wize.

Oh good, so I'm not the only one wondering.
We used to have a fairly steady 220V here, and all appliances clearly stated that, but over the past decades it seems to have shifted
to an average of 230V, and most appliances now state 220-240V... I suppose it may have something to do with the linking of our
national power grid to those of the surrounding countries...

No, the Grid is powered by Hitension AC, 33,000 volts, this drops down via transformers to different feeds to eventually 240v (230V) 50cycles (Hz for those who like Hz lol.) for Town and City usage
There is 3 phase power line poles along my street, there is a transformer on 2 poles about a 100 yards away from me, this supplies a 3 phase to the town, I'm on a single phase.

Ah yes, 3 phase. We have 2 phase here. We also do not have transformer boxes on poles, all our transformers are housed in little isolated boxes on the ground
or in slightly larger transformer shacks built of stone. All the wires run underground here, except of course for the high tension wires. Our telephone lines
also are underground. Makes for a lot less hassle with the weather; no problems with lightning hitting the poles or boxes, no poles blown over in a storm, etc.
I never really understood why some countries opted for 3-phase AC... I thought that was mainly usefull for higher tension? We have 3-phase on the industrial
lines over here, so factories, greenhouses, etc, they have a 3-phase higher tension feed that is on a seperate grid. But the average household only has 2-phase 230.

@ScienceMan/Boy
Sorry for the late welcome, but: Welcome to the thread

I think Jim gave some nice pointers. If you haven't done so yet, then i think it would indeed be a good idea
to read up a bit on Tesla. And Stubblefield, if you're interested in Earth Batteries. And well, kinda depends
if you're a reader or not, but if you are it might also be interesting to read some about Grey and his "splitting
the positive", Moray and his "radiant energy" amplifier, Kron and his "open path", Bedini and his "radiant energy
battery charging motor", and possibly Bearden's book "Energy from the Vacuum".

Besides the method of pulling energy from the air as Jim described, you could also do it differently;
http://www.rexresearch.com/tate/tate.htm and http://www.angelfire.com/ak5/energy21/ambientpower.htm
as well as this thread on the forum http://www.overunity.com/index.php?topic=6972.msg162822#msg162822
describe a way to pull energy from the air using a few diodes, capacitors, and an antenna.
The antenna does not necessarily need to be high up in the air, a number of people claim to have
gotten similar output from an "antenna" stuck in the ground.

Not sure aboutthe chamtrails though... Jim, what's that about?

Kind regards,
Koen