My first H2O splitting experiment

[gast]

After complete my selfmade square-wave generator (pulsing DC, max. 30V/48W/f=approx. 100Hz - 20KHz/duty cycle adj. approx. 35-65%) and doing some other experiements with selfmade transformers I tried to set up an H2O-splitting experiment.

I used a powerful 9V battery from an cordless screwdriver and 2 zinc coated metalplates (nothing different was available).
The plates had a distance of ca. 4mm. I used tap-water with a little pinch of cooking salt (nothing different was available :-) ).

I started the generator and test it on several frequencies. The max. ampere consumption was about 300-500 mA depending on the frequency.

But whatever frequency I used, the splitting activity was not better than a pure DC-electrolyses (tested by connecting the battery directly to the plates).
On some frequencies the splitting activity was lower than a DC-electrolyses, but never better.

What's wrong? Do I need more Voltage? (I tested this setup with another battery with 18V (also from an screwdriver), but same result. Okay, altogether more bubbles, but also in plain DC-mode more bubbles. :-( )

Thanks for your hints.

Bye, Gast

[hartiberlin]

Yes, you must use staircase waves for better efficiencies !

[gast]

staircase waves?

You mean something like this?

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What amount of voltage I need for a good result?

Hmm, do you have any suggestion for a proper circuit?

Regards, Gast

[hartiberlin]

Yes, this type of waves or direct a bigger step after the othe and no 0 volts between..
Inverters have this type of waveforms.Just rectify an inverters output with a graetz bridge..

Try around 700? Hz or double, so around 1500 to 1500 Hz.
A guy named Bob has tried it on the oupower.com forum and had success..

Try with higher amplitude voltages like 120 Volts or so..
Regards, Stefan.

[gast]

Stefan, thanks for the infos.

But to go for sure (I don't know the voltage curve of an inverter in the moment  ):

I think you mean this a) or maybe this b)

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