Groundloop

@nilrehob,

Thanks for the links.

I want to try to replicate the effect shown in the videos of the self
charging lead acid battery. As I understand it, the pulse width needs
to be approx. 2uSec. My switch is capable of switching down to 200nSec
so I'm not concerned about the mcu xtal frequency right now.

@nvisser,

Thanks. Do you have a link to the "Partic O kellys PJK book"?

I will try this on Ferrite core coil first. I use ultra fast diodes in
my design. (BYV29).

Thanks for helping.

Alex.

Hi Ash,

Making a 3 channel (or whatever number of channels) switch is easy.
What I need to know is the size, core used and number of turns on
the toroid transformer used by the guy who posted the videos of
the self charging lead acid battery.

BTW: My circuit posted here is open source. :-)

Alex.

Hi,

I was not sure where to post this but here is my version of a three
coil switch for lead acid battery charging. I'm not quite finished yet.
I have to make the coils and assemble the metal box. My switch use
a PIC16F84A-20 running at 20MHz. This gives me a switching time down
to 200nSec. I hope to get my coils done this weekend.



Attached is a link to the circuit drawings, the MCU program and some
images of my project. This is a zipped file.



I apologize if I posted this information in the wrong thread.

Regards,
Groundloop.