3v OU Flashlight

[dewetw]

Here is some fuel for our solid state fire: http://www.google.com/patents/US20110044419

The capetonian

[tysb3]

there is what we see on Akula's scope:

[Vortex1]

TK said:

I made a bobbin using a brass tube for the center and a couple of plastic discs for the ends. The tube fits nicely over the ferrite core.

You might want to consider that the brass tube bobbin will act as a low ohmic shorted turn and soak up a lot of your switchers energy. It will need a vertical slot to avoid this. Best to use something non-metallic to avoid this and eddy losses.

(old switchmode designer)

[mscoffman]

hi scratchrobot,

...

Do reveal to us if your replication is a success since you have the exact same Russian made ferrite pot core.

I have read this somewhere in internet it looks some of the old soviet made ferrite core are irradiated as part of the manufacturing process."Sorry i am unable to validate if this is true".

I am just thinking if this irradiation process do play a important "OU" role from the particular Russian Yoke to this recent ferrite pot core.

...

---

I really am talking quite outside my area of expertise. But nuclear irradiation per sei is a valid manufacturing process,
I think going by the name of "activation". One common product I know is activated is heat-shrink-tubing. I believe
florescent light & CRT phosphors are activated, and maybe piezo elements. It may be that only "select personnel"
would know what is actually going on in an activation manufacturing step.

It's important to remember that only *Neutron radiation* makes normal materials radioactive through
neutron synthesis. Other form of radiation won't and might be useful for other reasons in modifying material
characteristics. I believe it is fairly easy to intentionally filter out most neutrons from an activation beam.

One important reason for activating plastic is changing the chemical cross linking pattern of it. So if plastic is
included in the construction of a fly-back transformer it could very well be that they are using irradiation to
modify it. The inside of a TV CRT support circuit is a nasty location because high voltage present creates
ozone, a highly reactive chemical and the HV field present cause other chemicals from the air to condense
there. So I would expect that they maybe trying to get a leg up by hardening plastic in a way it will eventually
experience within the TV circuit. But I would probably consider neutron activation of components irresponsible.
Remember too before we had semiconductors, we had 0A2 vacuum high voltage rectifier tubes apparently a
potent source of x-rays operating in that same circuit. So long live, LCD's Liquid Crystal Displays.

:S:MarkSCoffman

[TinselKoala]

TK said:

You might want to consider that the brass tube bobbin will act as a low ohmic shorted turn and soak up a lot of your switchers energy. It will need a vertical slot to avoid this. Best to use something non-metallic to avoid this and eddy losses.

(old switchmode designer)

Yes, I know. Don't the specified foils in Akula's coils also have this effect? I think they are continuous wraps all the way around.

I reasoned that the specific material (copper) is likely a small Red Herring, just a minnow, but the known electrical properties should be approximated if possible,  so I simply used the brass tube as a substitute, performing dual function of physical support and electrically connected "copper foil". Since I don't have any copper foil or tape in stock at the moment. For the other "foil" I used aluminum duct tape. But I'm told I have it connected incorrectly. Strange, considering my scopeshots.

Do we really think that these foils are the key to keeping the LEDs lit when the power is disconnected? Slot, eddys, or not?

I have learned a lot from my experimentation over the past day, and having slept on it, I am starting to come to some conclusions that might not be obvious to people who are only theorizing about things like magic radioactive Soviet ferrites without actually having done any comparison testing.

For example.... mull on this. In my apparatus the bursts of oscillations from the MC34063 chip are creating the sinusoid from the transistor side, by transformer action .... not the other way around, as I thought at first. When the chip is precisely tuned, it picks up ambient LF EM and makes rail-to-rail noise bursts, which override the chip's normal nicely rectangular pulsetrain output. This rail-to-rail noise is transformed by the coils into a sinusoidal response which is amplified somewhat by the transistor. There is a complicated feedback relationship, but the result is easy to confirm... once you have the burst oscillations and the sinusoid established by careful tuning of the trimpot, you can _remove the core_ from the coil set (or I can, anyway)... and you can then, by carefully re-tuning.... re-establish the exact same burst oscillations from the 34063 but of course now there won't be any, or very little, transformer effect so there won't be a sinusoid and the transistor or mosfet won't switch.

At the moment I am certain that my apparatus is responding to the mains powerline LF EM when precisely tuned. Sure, this is a "resonant" effect. But not having to do with the core, since it can happen without the core at all! The question then becomes, what in Akula's environment makes the 270 Hz LF EM that his circuit seems to be responding to? I am 99 percent sure that his board is also picking up and responding to ambient EM in this manner. This isn't the secret to keeping the LEDs lit after removing the obvious power wires, though! At least I see no way for this behaviour to couple power into the capacitors so that the chips and LEDs will keep running when the primary power is removed.