Hi all, tito, it sounds like you're talking about an auto-transformer or like the configuration in the older oil filled ignition coils.
peace love light

"in a core there should only one coil but in 75% of the coil should be an extra coil and part of the one coil and the 25% of the coil is the input, so when electricity enters at the 25% of the coil, the 75% is energized because it is inside of the magnetic field of the 25% of the coil so then if we make and brake it the power then will grows very fast. then that's it. is it very hard to understand friend. "

So, the 3th is 3x the 2 ... if using...
no need for avr to charge battery...(just add collectors) a very simple design...
no spark, just pulse it...
0.500v , 75 ma, charging 9.5v bat... discharge  is mini tini...just re..re do it, re fill it ...to keep it alive...

you are telling all !!! can't you see?

Quote from: Tito L. Oracion on September 30, 2016, 04:56:46 AM

I am not exactly sure what you are talking about.


Well, some says i'm a good teacher but some others don't.
What do you think? 


in a core there should only one coil but in 75% of the coil should be an extra coil and part of the one coil and the 25% of the coil is the input, so when electricity enters at the 25% of the coil, the 75% is energized because it is inside of the magnetic field of the 25% of the coil so then if we make and brake it the power then will grows very fast. then that's it. is it very hard to understand friend.

one coil : and one coil transformer gives by google enter:
https://www.google.pt/search?client=opera&q=one+coil+transformer&sourceid=opera&ie=UTF-8&oe=UTF-8


auto - or self-transformer  
In an autotransformer, portions of the same winding act as both the primary and secondary sides of the transformer. In contrast, an ordinary transformer has separate primary and secondary windings which are not electrically connected.

                                                                   coaxial
https://worldwide.espacenet.com/publicationDetails/mosaics?CC=DE&NR=4318270A1&KC=A1&FT=D&ND=&date=19941208&DB=&locale=


but amplifying only gives not the wished result ,here 10X : 30W in and 300W output by 20 Hz:
https://worldwide.espacenet.com/publicationDetails/mosaics?
CC=FR&NR=667647A&KC=A&FT=D&ND=3&date=19291018&DB=EPODOC&locale=en_EP
google translated
The accompanying drawings (which are only one example of implementation of this inven tion) represent a small machine-type for single phase in approximately 20 -périodes, a power- -Efficient 300 watts, supplied by a low battery 6 volts 5 amps (that is to say, a growth medium and then 30-watt, that is to say a 10-fold that can be aug mented further.
The same principle applied to a system of 3 identical machinery ticks, properly combined and com mended by an appropriate unique rotary switch allows -Produce three-phase 50 or 60 periods (identical to the three-phase alternators) with convenience and high economy.
in this new principle, ii no transferable inactive power. the required power depends only on the dimensions of the machine. the accompanying plans are only matic Route map, they are shown in Fig. 1 and 2 (inductor body in longitudinal and transverse views.

Thank you for answering to this Newbie!

I think you're the best teacher, because you always tell the truth and give us your knowledge for free. Thank you very much.

I know it is very hard to understand this kind of knowledge like yours, I wish, but that is a gift from God!

I had to read your book too many times to understand just a little bit.
I'm really confused in this last part, I mean no av-p? just as autotransformer