I've made a lot of brainstorming about HHO circuit to improve efficiency reliability and ease of tuning. 

This is what I came up with. 

This is basicaly a DC circuit, with a higher voltage, around 120V, high frequency pulse from a custom made flyback transformer. 

It is somewhat similar to what Bob Boyce 100 plate design, it has a strong DC bias with a high frequency pulse riding on top.. Except he was using 3 frequencies, I'll be using just one. Also, my circuit uses a separate circuit to create the HF as he was pulsing on the same transformer.  This allow me to create a higher voltage pulse. Current from the DC side will be controller via:

*the number of turns on the chokes

*electrolyte concentration

*Pulse width and freq of the PWM: controls the amount of current that goes into the secondary, thus creating more or less ionisation of the water, that define the amount of current that'll flow from the DC side. I may have to add a voltage control (DC/DC circuit) before the PWM, to have more precise control of current.

Also, not drawn, is a diode on the + side, between cell and battery, to keep the HF pulse going back to the battery. Obviously, I've ommited to draw the relay, breaker and fuse piggy back that goes on the vehicle.

I didn't draw the diode cause I wanted to know what you guys think, if it'll be necessary or not. 

The cell is a 13 plates, 5 neutral, with a quarter inch gap. It's a wet cell, all plates are joint at the bottom of the cell, with an epoxy or urethane casting. So they are all free to vibrate, in as overhang fashion. 

It'll allow for acoustic, mechanical and possibly L/C resonances. 

Please tell me what are your thoughts about it.

Thank you. 

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