Akula0083 30 Watt Self Running Generator.

[JohnnBlade]

Did you notice that two, but not all, of the potentiometer cases are soldered into the circuit? Why do you think that is? Why do any, or why not do all.... ??
   

Maybe he tunes/changes that so much that the pots come off ( but why not use multiple turn pots for finer adjustments) , cause he first had the pot a few lines on the circuit board as you can see 2 holes made into one. But he then figured out that his pot wont fit in there. So he had to move his pot more to the left end of the board.

( i know some peepz could think he added a tiny batt in there )

And if its a joule thief, then its a damn ugly ass joule thief with to many components.

But the circuit is still interesting to test, and in this circuit he removed 1 mosfet driver, and added 1 cap, 3 diodes and a switch, cause in the other clip where he uses that step-down thing he doesn't use those cap and diodes.  There he found out he did not need the step down thing at all.

Im not sure, but the circuits posted on page one of this thread i think its wrong, it doesn't match the way i see the circuit ( after checking out this circuit a million times, and now still seeing it when my eyes are closed : )

I think later i will fix those 2 signal gens the way its in the movie, and test for my self why that other sig gen is setup like that. 1 runs the small 7 turn coil ( fundamental ), the 2e runs the 12 turn coil ( harmonic), and the other is just the pick up.

And has it even been confirmed that he is using 2 tl494?  ( looks like it, but the label printed on it i havent seen on any tl494, or its some russian variant.


But all i can say is, i just have to build and test this circuit, and if no special effects, then ima continue with my other projects : )

Greets JB

[wattsup]

@TK

Yeh, don't know what it is but I will use my other older scope for two ch screen comparisons.
I put 4 images below at 1, 5, 50 and 500KHz. Starts well but ends bad. Probes have been calibrated and both channels are set identical.

@JohnnBlade

Those are good questions.
Too bad we cannot do the same for the AK30. All there is a circuit photo.

@MH

You still have to first pave the road to then look back upon it.

And no, this cannot be found by accident so why should 100 years of EE have discovered it before, just by chance pulsing a coil at freq.x? It takes much more premeditation then just falling onto it by chance. I am sure some great minds already know all this. So there are too many critical effects that need to come together for anyone to just say, "then why hasn't EE found this before".

wattsup

[verpies]

On the circuit of the lantern no3 there are 2 tl494 but why does 1 have
Pin 1 going to pin 16 and pin 16 goes to 13 and the other does not have that

And the other has
Pin 2 going to pin 15 and pin 15 goes to pin 14 and 13

Pins 15, 16, 1 & 2 are the comparator/amplifier inputs.
They are wired differently because  feedback loops are different for these two chips.

[MenofFather]

I dont think you would need a schematic for the lantern no 3, since all info you have is on the board.

Count all the holes in the board, every section has 5 by 5 holes in it in sections.
The when akula turns his board around you can see al the solder lines, just follow then and coordinate them.

Take piece of paper with small squares, and draw the solder lines first matching every square on the paper with a hole on the board. Then turn that paper around and draw the components, then when holding the paper in  light so you can see the back true the front side and yll get all paths and components.

Just take small time to reverse engineer as much as possible instead of checking to many circuits.
Once you have yr own circuit you can compare against other circuits and see which matches the most.

Or just try to build it yrself and test the hell out of it

Greets JB

Schematic of 1 W divice not neaded baisicly, because he seems give all informatio, that here two generators. One frenquency is feroresonance frenquency about 1-3,5 megaherc (just need use 200-400 kiloherc to put short pulses), other is standar transformation frenquency of about 18-35 kiloherc. Sincronisation of two generators must be made by first fronts. And if not work, try diferent cores, because Akula also sometimes can not get succes.

[MenofFather]

....And has it even been confirmed that he is using 2 tl494?...

Not be confirmed.
But in one question ask how TL can make 1,3 megaherc, then akula answer, that he with TL get 10 ns pulses in one setup if I good remember, something like this be dialog. And need use fast transistors, who fast closimng at opening, for example, fast transistor is IRFB4019.
IRFB4019
Turn-On Delay Time_____7.0 ns
Rise Time_____________13.0 ns
Turn-Off Delay Time_____12.0 ns
Fall Time______________7.8 ns
Or
IRFZ24N
Turn-On Delay Time_____4.9 ns
Rise Time_____________34 ns
Turn-Off Delay Time_____19 ns
Fall Time______________27 ns
This transitors in my opium is inaf fast for 1 W lantern.
And this is fast: PIRF2807