Overunity electrolysis - 31 times more effective gas production than with DC

[MarkE]

I am doing some research in this area and it seems I have found some interesting discoveries.
I've proved for myself that I can achieve better efficiency with short pulses and higher frequencies.
Also that AC voltage does not work nearly at all.
AC that is created with one switching transistor + transformer does not work nearly at all too. After adding diode it is like day and night.
For different transistor there are different frequencies to achieve the best results.
Faster transistors, better results (and higher current).
I am trying to stay around 10W and it seems I can create enough HHO to power tiny engine at real time with 2-plate cell and tap water.
I have not tested it with distilled water yet, but I can't wait to see result.

Data?  How much mechanical power can your system deliver at its output from the 10W electrical you supply at its input?

[ingyenenergiagep]

What is the best frequency for hydrogen generation?

I use about 340kHz with NE555 and IRFP150. I didnt find overunity. The bubbles are smaller.

[MarkE]

What is the best frequency for hydrogen generation?

I use about 340kHz with NE555 and IRFP150. I didnt find overunity. The bubbles are smaller.

340kHz is pushing an NE555 pretty hard.  You might want to use a TLC-555 instead.  Even Radio Shack sells them.  You might also want to add a boost driver between the 555 and your FET's gate so that you don't lose a lot of energy from the MOSFET turning on and off too slowly.  A PNP and NPN transistor pair will do: 2n2907a for the PNP / 2222A for the NPN or similar.  3906 and 3904's will work as well.  There are also lots of MOSFET driver ICs on the market. 

A lot of people have tried frequencies as low as 2kHz.   Les Banki claims to have good results.  You can look up his circuits.

[Paul-R]

What is the best frequency for hydrogen generation?

John Worrell Keely used 42.8khz.

[ingyenenergiagep]

Thanks.

Audible sound freqs (under 17kHz) gives bigger bubbles (PWM about 50%), not milk-like small bubbles.
Positive Ni plate wears brown powder coat, negative plate wears black(on solution)/white(on dry) coat.

With closer plates (0,5-1mm) i saw high-temp rainbow-like colors on plates (maybe H and O reaction).