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Author Topic: 3v OU Flashlight  (Read 563390 times)

lost_bro

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Re: 3v OU Flashlight
« Reply #375 on: April 30, 2014, 09:45:27 PM »
This would not fit with the other attachments:

take care, peace
lost_bro

TinselKoala

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Re: 3v OU Flashlight
« Reply #376 on: April 30, 2014, 09:48:20 PM »
Thanks, lost_bro.

In the "Formula" slide, what are the units of ID and OD? mm, cm, inches, furlongs?

I think that formula is for toroids but I can approximate a toroid with a rectangular shape, don't you think?

I believe my ferrite is the MnZi material, since it has 50 ohm/cm conductivity.


TinselKoala

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Re: 3v OU Flashlight
« Reply #377 on: April 30, 2014, 09:56:30 PM »
Well, using the formula with cm as units gives me 29. And using mm as units I get 2.9. (I used 50 mm for OD and 25 mm for ID).

Are these Hz? Cycles per microsecond? What did I do wrong?

From the slide:

FMR = 5700/(3.142 * ((10 * OD) + ( 10 * ID)/2))



TinselKoala

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Re: 3v OU Flashlight
« Reply #378 on: April 30, 2014, 10:10:18 PM »
110mA at 3V is way too much. All you need is to generate spikes on driving transistor and shut it off as soon as LEDs get lit then wait until capacitor gets discharged and LEDs are in off state again before next pulse train...


I know that. Tell it to the circuit though! I can certainly get the current draw to go quite low, to 30 mA or less, with still pretty bright LEDs. This is driving the MC34063 chip +properly+ though, not with all the feedback and noise and undervoltage that this circuit provides. There is only one tuning pot, after all, and one simply forgets about waveform and cranks the pot a bit in the "dim" direction until one sees a current and brightness value that one likes.

I would appreciate seeing some valid measurements... and trustworthy ones... from Akula while he's making this same set of waveforms. That would be helpful, don't you think? Do you think we'll ever see such? I don't.

Quote
Also for resonance - the effect is same as per Lithuanian experiment just on much smaller scale which is not harmful to health. So you need to reach NMR conditions of black hard ferrite (won't work on greyish soft) to have additional energy input there;)

So you believe. Do you have any evidence for this belief?
Do you actually understand what Nuclear Magnetic Resonance means? Do you believe that this circuit depends on NMR in some way?

I operated a NMR spectrograph machine for the first time over thirty years ago, but there we were concerned mainly with flipping hydrogen protons at their resonant frequencies when bathed in an RF field. It's a chemical analytical tool. The power required is rather large, IIRC... and that's just affecting single, deshielded protons clinging onto the outside of larger molecules. (The frequency of flipping of a proton depends strongly on its immediate electron environment so much can be determined about molecule shape and composition by looking at the NMR spectrum of its hydrogen protons.) I have to admit that I know nothing of NMR in compounds made of large metal ions and alloys, but I suspect that there is nothing I can do in my laboratory that will affect the nuclei of these atoms. Your results may differ. May I see your data and demonstrations?




TinselKoala

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Re: 3v OU Flashlight
« Reply #379 on: April 30, 2014, 10:16:26 PM »
Yes, there is something wrong on the last page of the Akula0083 thread that is preventing it from loading. You can get to the last loadable page here:

http://www.overunity.com/14378/akula0083-30-watt-self-running-generator/1005/

lost_bro

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Re: 3v OU Flashlight
« Reply #380 on: April 30, 2014, 11:34:56 PM »
Hello All:

OK, trying to figure this out.


*Ferromagnetic Resonance is also called spin precession resonance.

*The loss factor, which is the normalization of loss tangent per unit of permeability, is a material property describing       the loss characteristics per unit of permeability.

*This remains true so long as the increase in height/length does not cause the core to be in dimensional resonance.


Dimensional Resonance is *DIFFERENT* from Ferromagnetic Resonance (spin precession resonance).


take care, peace
lost_bro

gyulasun

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Re: 3v OU Flashlight
« Reply #381 on: April 30, 2014, 11:36:06 PM »
Well, using the formula with cm as units gives me 29. And using mm as units I get 2.9. (I used 50 mm for OD and 25 mm for ID).

Are these Hz? Cycles per microsecond? What did I do wrong?

From the slide:

FMR = 5700/(3.142 * ((10 * OD) + ( 10 * ID)/2))

Hi TinselKoala,

I recall a similar formula which originally was given in a data sheet by Philips (acquired later by Ferroxcube) and the core material was 3R1 with square loop (nearly rectangular hysteresis loop) feature also for MnZn ferrite material.  However that formula from Philips did not include a 10 times multiplier in its denominator, and there seems to be a parenthesis shift at the end too in the formula you were given, see the Philips formula in Page 8 of the attached file.   

With your OD=50mm and ID=25mm, the mechanical resonant frequency for the core comes as 48.4 kHz from the Philips formula.

Maybe tuning the core to this frequency could give something useful...

Gyula

lost_bro

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Re: 3v OU Flashlight
« Reply #382 on: April 30, 2014, 11:58:51 PM »
Hi TinselKoala,

I recall a similar formula which originally was given in a data sheet by Philips (acquired later by Ferroxcube) and the core material was 3R1 with square loop (nearly rectangular hysteresis loop) feature also for MnZn ferrite material.  However that formula from Philips did not include a 10 times multiplier in its denominator, and there seems to be a parenthesis shift at the end too in the formula you were given, see the Philips formula in Page 8 of the attached file.   

With your OD=50mm and ID=25mm, the mechanical resonant frequency for the core comes as 48.4 kHz from the Philips formula.

Maybe tuning the core to this frequency could give something useful...

Gyula

OK,  just to clarify from the attached PDF file posted earlier:

take care, peace
lost_bro

Vortex1

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Re: 3v OU Flashlight
« Reply #383 on: May 01, 2014, 12:01:22 AM »
Took a few hours to build this Akula dual 494 switcher. I tested both channels independently with dummy resistor loads.

 Channel 1 Frequency range around 13 kHz to 400 kHz, duty cycle control, 0 to 45%

Channel 2 Frequency range  around 26 kHz to 800 kHz duty cycle control 0 to 90%

With five parameters and such wide adjustability, it would seem difficult to hit the sweet spot.

I used ten turn trimmers for good resolution of setting.

Note that one of the trimmers, the 10k hooked to pin 1 sets the voltage shutdown level.

Core and coil testing is the next phase.

Regards, Vortex1 aka ION from Overunityresearch.com

TinselKoala

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Re: 3v OU Flashlight
« Reply #384 on: May 01, 2014, 12:21:16 AM »
Took a few hours to build this Akula dual 494 switcher. I tested both channels independently with dummy resistor loads.

 Channel 1 Frequency range around 13 kHz to 400 kHz, duty cycle control, 0 to 45%

Channel 2 Frequency range  around 26 kHz to 800 kHz duty cycle control 0 to 90%

With five parameters and such wide adjustability, it would seem difficult to hit the sweet spot.

I used ten turn trimmers for good resolution of setting.

Note that one of the trimmers, the 10k hooked to pin 1 sets the voltage shutdown level.

Core and coil testing is the next phase.

Regards, Vortex1 aka ION from Overunityresearch.com
Good that you did it that way, it gives me a better idea for my own layout, which I'm starting to build.

Some questions if you don't mind.
1. What specific exact schematic did you use?
2. I see you are Miller-clamping both mosfets. What PNP transistors did you use here?
3. And... do you really really think you are going to need those large heatsinks? Let's see.... if a 9v battery is capable of supplying 9 amps into a dead short for a few minutes...  wow. You must be expecting some pretty serious overunity to need those big heatsinks.
4. What mosfet part number are you using? I will be starting with IRF3205 I think, which has such a low Rdss that it probably won't need a heatsink even with 9 amps DC flowing through it.

The device is supposed to use LEDs for the "load" isn't it? LEDs are very non-linear, they behave nothing like resistors. Your load resistors aren't going to give you a proper idea of the circuit's operation or performance.

I was expecting one of the 494s to have a much lower operating frequency.



How are you going to get batteries into those tiny trimpots? I think Akula is probably using button cells inside two of his potentiometers.  ;)



TinselKoala

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Re: 3v OU Flashlight
« Reply #385 on: May 01, 2014, 12:26:52 AM »
OK,  just to clarify from the attached PDF file posted earlier:

take care, peace
lost_bro

OK, using that formula I also get 48.4 kHz, which makes a lot more sense and agrees with the result Gyula posted. Units are important!

Thanks much.

However.... I am pretty sure that formula is for a one-piece toroid. The fact that we are all using multipiece cores will probably screw that up.

Vortex1

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Re: 3v OU Flashlight
« Reply #386 on: May 01, 2014, 12:44:26 AM »
The schematic was derived by a couple of fellows at Overunityresearch, I may not be at liberty to post their detailed work. I will check in with them, or since they read here,  they can chime in.

I'll see if I can post you a link: http://www.overunityresearch.com/index.php?topic=2420.msg38115#msg38115

The heatsinks are just insurance should I get into a saturation condition when I hook up the inductor, never hurts to have a little extra heatsinking, besides if this doesn't work as advertised, I would like to use the driver for other experiments. I will also be driving some larger ferrites, perhaps from a power supply so I can watch the power consumption as I tune.

I used 220 ohm load resistors so that I could observe the switching without a lot of ringing etc, it is just a first step to see if everything is working correctly, then I will build the rest, including putting in some of the transient protection diodes and a properly wound and gapped ferrite core, MnZn type.

I know about LED's non-linearity, they are not necessarily the only devices I will use as a load test.

I am well aware of the limitations of a 9 Volt battery, and I do not expect any serious overunity.

The Miller clamps are specified as 2n3703, but faster devices could be used if needed.

I'm using IRF530's because I have them on hand, 14A 100V, nanosecond switching ability 0.16 ohm rds(on)

Should I perhaps not be posting here? I haven't done so in a few years but was very active in the past.
« Last Edit: May 01, 2014, 04:08:59 AM by Vortex1 »

lost_bro

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Re: 3v OU Flashlight
« Reply #387 on: May 01, 2014, 12:55:41 AM »


However.... I am pretty sure that formula is for a one-piece toroid. The fact that we are all using multipiece cores will probably screw that up.

Good evening TK

Yes, you are correct... It is for a Toroid.

I guess I just wanted to expose the fact that the anecdotal information of * Core self-destruction* is not based on Fantasy or Imagination but does has a * rational * explanation.

We have to start somewhere with this.....

take care, peace
lost_bro

Cap-Z-ro

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Re: 3v OU Flashlight
« Reply #388 on: May 01, 2014, 01:33:00 AM »
The schematic was derived by a couple of fellows at Overunityresearch, I may not be at liberty to post their detailed work. I will check in with them, or since they read here,  they can chime in.

I'll see if I can post you a link: http://www.overunityresearch.com/index.php?topic=2420.msg38115#msg38115

The heatsinks are just insurance should I get into a saturation condition when I hook up the inductor, never hurts to have a little extra heatsinking, besides if this doesn't work as advertised, I would like to use the driver for other experiments. I will also be driving some larger ferrites, perhaps from a power supply so I can watch the power consumption as I tune.

I used 220 load resistors so that I could observe the switching without a lot of ringing etc, it is just a first step to see if everything is working correctly, then I will build the rest, including putting in some of the transient protection diodes and a properly wound and gapped ferrite core, MnZn type.

I know about LED's non-linearity, they are not necessarily the only devices I will use as a load test.

I am well aware of the limitations of a 9 Volt battery, and I do not expect any serious overunity.

The Miller clamps are specified as 2n3703, but faster devices could be used if needed.

I'm using IRF530's because I have them on hand, 14A 100V, nanosecond switching ability 0.16 ohm rds(on)

Should I perhaps not be posting here? I haven't done so in a few years but was very active in the past.


Glad You're back V...its been a while.

I look forward to reading more of your posts.

Regards...


Vortex1

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Re: 3v OU Flashlight
« Reply #389 on: May 01, 2014, 04:12:52 AM »

Glad You're back V...its been a while.

I look forward to reading more of your posts.

Regards...

Thanks Cap, yes time flies......