Meyer's WFC concept analysed

[aussepom]

hi for those of you that want to follow the Meyer tube units have a look at this  this is my improvement.
Ravi said to look into the BEMF so I have installed protection diodes and diodes to direct the BEMF
aussepom

[Farrah Day]

The Buz350 does not, but many other MOSFET'S  have that zener protection built-in, which is worth noting if you can't get hold of Buz350s.

I have a few RFP40N10 Mosfets knocking about, which I will use. They have the built-in zener. They are rated at 40 amp, but only 100V (compared to the Buz350's 200V), so only time will tell if the lower voltage rating becomes an issue.

I don't see anything wrong with the diode 1N1007.  It is actually the one you want to use, it has a 1000V reverse voltage rating. What value are the zeners? And why two?

Farrah Day

Just did your simple test Hairbear. Spent 1/2 hour puting together the simple cct you mentioned using a 6 volt battery.  I didn't feel so much disappointed as rather foolish for wasting time on this when the results were just as I predicted they would be. How can there be no voltage drop and no current flowing?? Guess the it's all in the 'dinkin'! 

Do this test yourself again and see if you can achieve what you said you could. If you can, please let us know how to 'dink'.

[aussepom]

Hi I missed a couple of thing of the last drawing
Faraday asked a question
You could use one zener or even three depending on the rating two 75v in series will give you 150v  that means any voltage above 150v will be by pass the mosfet providing you rat the wattage high enough. You could use one at 150v.
Do no rely on any protection in the mosfet, the higher voltage you use the better 400v is safer  you may look at the 12 v  but when the mosfet turns of the collapsing coils can put out a high voltage if you are not using the coils don't bother.
The IN4007 in the position that it was is not good it will direct the collapsing coils voltage into your timing circuits; it may not be rated enough for taking all the power to your cells.
The other diodes will direct the collapsing voltage and current back around through the cell.
Make sure that the coils are connected with the starts as shown, as one will boost the other.  I said to try them on a toroidal as I believe it would be better that the ferrite rod, make sure that the windings are evenly spaced over the coil even if you have two layers or more.
aussepom     

[HeairBear]

I apologize for my hasty explanation. The test requires a voltage of 2.5v or so. Since tap water is different for everyone, the exact voltage will vary. With my tap water, I could go up to about 2.7v before current would flow. Just before that point where the circuit remains open, the plates still have a voltage potential across them. Even though there is no current, you will still make a tiny amount of gas. If your tubes or plates have an oxide coating, the voltage may be a bit higher before it starts to draw current. With a pulsed current, the voltage should go even a little higher.

I also forgot to mention that I used a 2k variable resistor for a wider voltage range to test. 2 to 3 AA's are all I have that will do that low of a voltage so thats why I said to use those. 6v is a little high, but I think we can get up to that easily without any current if we try a little harder. How much current did Stan's device/s use? I thought I read 500ma. Can anyone confirm this? I also wonder if the initial startup current is higher and then it lowers after the balance is found.

Cheers!

[Farrah Day]

Hairbear, as it takes between 1.5 and 2 volts to initiate normal electrolysis, is all that is happening you would be 'hovering' around this point. Just below it and no current will flow, just above it and current will flow. A bit of a balancing act then.  Any small abount of bubbles on the plates will be created by free oxygen in the water reacting with the plates.  If you put a ss plate in tap water you will find that you do get some bubbles formed on the metal surface even without any power supply.

At no point will the voltage drop to zero. That is, unless you had a short circuit across the plates, which would obviously cause high current flow.  Low voltage electrolysis is more Kanarev's field and does not really apply to Meyer, which I think everyone accepts was based on high voltages.

If you can recreate this experiment, and at any point achieve no voltage drop across the electrodes (without them being shorted), I would be very interested to know how you did it. All due respect, but I won't be holding my breath!

Farrah Day