URGENT! WATER AS FUEL DISCOVERY FOR EVERYONE TO SHARE

[bxngoc]

Hi Groundloop,
I tried your circuit but got no spark. I used a good telephone transformer from Tamura (P/N: T1104) and SCR p/n: BT151. I hook input trigger coil of the transformer to pin RC0 of a PIC and wrote a small program like this

Code Select Expand


void main() {
    PORTC = 0;
    TRISC = 0;

    delay_ms(50); // Charge capacitor for 50ms
    while(1) {
        PORTC.F0=1; // Discharge capacitor for 1ms
        delay_ms(1);
        PORTC.F0=0; // Charge capacitor for 50ms again
        delay_ms(50);
    }
}

I measured output pulse at secondary coil and adjusted pot to got 0.9V between G and K pin of SCR. Then I supplied 110 VAC to the circuit. Nothing happened. I slowly adjusted pot back and forward but nothing happened too.
All components that I used are working with mechanical relay circuit of Luc.
Hope to get your solution. Can we use an optocoupler instead of transformer because the transformer makes trigger pulses distortedly?

[xbox hacker]

@Dread:
I use 300VDC. My latest jig is a 3/4" PVC TEE, so what ever the volume of that is... My old jig was a 3/4" PVC tube about 5" long...so what ever the volume of that was...LOL

My setup is 110VAC mains going into a voltage doubler = just over 300VDC...that then goes into a 270uF 400V cap

[Dread]

Thanks X-box

The pressure test results:

I have a problem with the relay not being able to cope with much more that 100V with any consistency but I managed.

OK. Volume of combustion chamber 100ML (+/- 4 OZ)
Single shot @ 35PSI and 125V from the variac,  Adjusting anode and cathode screw heads for bigger and smaller gap, Using tap water.
The best pressure change was +1 PSI.


The results are disappointing. However, I now have a baseline. I know I need a more robust relay and much more voltage.
I will repeat test with electrolyte once I have replaced the components.   

Rgds
D.

[Dread]

@ Foxwhisper

Have you tried heavier gauge wires? I found my 600V spec wires if used on both electrodes make a measurable improvement.

Hope this helps
D.

[Groundloop]

bxngoc,

It did not work because you did not build the circuit as shown in my drawing.
Look at the data sheet for the TIC106D and then look at the data sheet for the BT151.

The BT151 needs 2 mA to 15 mA (max) at 0,6 volt to 1,5 volt (max) to trigger the gate.
The TIC106D needs 60 uA to 200 uA (max) at 0,4 volt to 1 volt (max) to trigger the gate.

You MUST use the TIC106D or a 100% simmilar LOW gate current trigged SCR.

EDIT: Another issue. You do need to time discharge timing in your PIC program. You only need a
pulse (trigger pulse to the transformer) that is long enough to trigger the SCR. The discharge time
will be controlled by the size (value in uF) of the capacitor used. When a SCR triggers, the current
through the SCR will go on until there is no more current possible from the capacitor. The SCR will then
close. It is not like a MOSFET where you can switch off the device by will. Set the discharge time in
your program a little bit higher than the SCR will stay open. The PIC program will then look like this:

1. Wait until capacitor is fully charged. This can be done by actually measuring the voltage over the capacitor
    with a oscope and find the time it takes to charge the capacitor.
2. Send ONE pulse that is long enough to trigger the SCR. Found by exprimenting.
3. Wait until capacitor is fully drained and the SCR has closed. Found by oscope measuring the capacitor.
4. goto 1.

EDIT2: Yes, it is possible to use a opto coupler. I'm currently working on a circuit that will take the power from
the 120 volt rail to power a pic and opto coupler. This circuit (posting very soon) will be able to use other SCR
like your BT151 because we can adjust the gate power needed by changing a resistor value. Stay tuned.

Groundloop.