3v OU Flashlight

[lost_bro]

This would not fit with the other attachments:

take care, peace
lost_bro

[TinselKoala]

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]

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:

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

[TinselKoala]

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.

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]

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/