Controller Version 3 - Hunting for more pulses using pulse train.

[Peterae]

I am in the process of testing out my new controller.

It is 4 channel each channel can delay from 0-255 nS and each can set the pulse width to 0-255nS.

I am using My digital Mono modules see circuit below which plug into the controller board.
I am also using an earlier controller to automate thumb switch flicking from 0-255 on the delay for 1 channel.

Notice on the scope trace there are 3 pulses, each is set to 255nS spacing and 32nS width, This is for LUC notice i am only scoping the Drain of the fet without anything connected and yet i get 20vpk pulses.I had the gate and source transposed.

[darkspeed]

Very cool! 

[szaxx]

Hi Pete,

This will be nice to see under a resistive load with a HV setup.

Keep up the good work.

Steve.

[Peterae]

Thanks guys, i was surprised to see the pulse on the drain without a voltage connected and a load, and have just won the idiot of the week prize, for some reason the foot print i used to make the pcb transposed my source and gate, which explains the massive pulse coming out the drain, i am driving the source with the gate grounded DOH.

[Peterae]

Pulse width of each channel is 32nS, my fet/coil psu is set to 30Volts.
Scope is 20V/div and 100nS per div.
Green trace across the diode and coil.
Yellow trace not used

ok i swapped over my gate and source and all is well, i constructed a coil consisting of 40 turns.
And run an initial 2 Channels to find the anomalous pulse and check i am able to produce it with just one fet system.

First run showed up another problem with my PCB, i always use a minimum etch method, when i ran the first test as the pulse appeared i could hear crackling underneath the board, it would appear the pulse does indeed increase the amplitude enough to cause this to discharge to earth LOL, with my trusted knife i cut more gap around the drain track and having changed the fet my first test was with good outcome.

It was always doubtful that it was possible to produce the pulse with a one Channel fet system for a number of reasons, first being whether the fet could switch on and off fast enough to allow the correct switching times to produce the pulse and secondly whether a 2 earth/fet wiring system was needed to create a ground loop to allow the pulse to form, this has all been put to bed now.

It is also interesting to note that the cpu crashes and violent noise bursts i had on my previous controller seem to have disappeared which would lead me to think they were caused by ground loops in the wiring.

Next up to add more delay stages to see how the pulse changes in amplitude on it's 2nd and 3rd creation.

My scope seems to have developed the jitters even with the probes disconnected, i have tried a recal with no luck, if anyone knows why a Hanteck might do this let me know, the yellow trace doesn't have a prob connected either in the above test.

Peter

[Peterae]

The next test was to add a 3rd Channel and i have run a quick test, i was hoping to produce a 3rd pulse with the 2nd pulse set for the anomlous pulse and was hoping to see the 3rd pulse even bigger in amplitude, but as it turns out the delay setting of the 3rd channel alters the delay setting of the 2nd channel so it's going to be hard work finding the delay setting for both that allows a 2nd and 3rd pulse to appear.

Interestingly with the 2nd Channel set for the pulse and then doing a scan of the delay on the 3rd Channel i reach a point where the fet and coil stage start to draw large current and at this point i get re triggering of the fets, as my psu is only capable of 1amp i am limited to the destruction that could happen and because my fet has a good heat sink i am able to run for some time, the net result was my lap top rebooted from the radiated EM, the coil also clicks and sings at the frequency to which i am driving.

I need to think on this, it's a chicken and egg situation, there must be a condition when 3 pulses are timed correctly that either causes an initial high current or an initial hi EM radiation which then starts the re-triggering which then compounds the problem, but something must start the process off, if it's a Radiant burst from an initial low current drain then i'm in luck i may have found the golden goose.

[Peterae]

A bit of light entertainment.

32nS pulses, 3 Chanel delayed, 2nd pulse creates the big pulse, 3rd pulse is set to create the re-triggering.

I tried my AG coil and being driven by 3 channels during re-triggering the wires of the coil jump around at high speed, unfortunately there's quite a lot of current flowing so i guess it's to be expected, the poor little wire is being pulsed with up to 1 amp and it's only rated for low current.

http://www.youtube.com/watch?v=O8GgiEeH1W4

[stprue]

Nice job Peter that looks like a fun test!

Amp pulses....I hope the insulation is still on that thin mag wire

[BEP]

Peterae,

Have you tried using a more physical approach?

ex. One FET simultaneously firing three coils? The last two coils being adjustable in position in relation to the previous coil? Or a TL used to delay one pulse to all three?

To me, the relaxation pulse appears to be a magnetic reconnection.

[Peterae]

Hi Wave
What an interesting idea 3 coils in parallel

Cheers, i willl give it a try

Peter

[Peterae]

With this controller i had a few things to checks out.

1) Could the pulse be produced using only 1 fet stage and this has proved i can.

2) Do i get re- triggering of the fet modules and i have found under certain circumstances i can get re-triggering of the fet modules, this proves that it was not a complex ground loop causing the re-triggering.

3) Can i produce explosions in the wire as i could with a dual fet stage and the answer here is a definite no.

4) Can i get even bigger pulses on the 3rd and 4th switch cycle of the fet module, the answer to this is that i have not been able to produce, a steady 2nd pulse it seems to alter the 1st pulse timing.

Using a magnet on the coil of the 2 fet system when i was close to getting explosions i could here them quietly with the magnet close, this allowed me to fine tune and get much bigger explosions without the magnet.
Interestingly also as the settings got close to cause the explosions in the 2 fet system i could here white noise(Audible hissing) also coming from the coil.

In the 1 fet system instead of this white noise i here the base frequency tone even during re-triggering.

My conclusion from the above means that it takes at least 2 fast pulses in one wire with possibly ground loops and critical timing to cause the explosions, probably meaning the re-triggering of both fet stages is randomly causing a crossover firing event of both fet stages, and that it takes much more than 2 random single separated pulse events in a single wire for the explosion to occur.

This is really good news, now i all i need to do is work out a system to record the timing of the re-triggering events of both stages to be able to create the explosions at will and study the conditions which causes them.

Peter
Just to recap
Here's the explosion video

Here's the pulse video

[BEP]

Hi Wave
What an interesting idea 3 coils in parallel

Cheers, i willl give it a try

Peter

Yes, three in parallel but each at slightly advanced location in relation to the previous coil. Best done on a toroidal core with movable coils. Coils can be in series as long as you consider which one sees magnetic buildup first (closest to power source).

In the past, I used a sheet of window glass for bench top. The glass broke when was banging hard against the glass. I use plastic now 

None of this makes sense unless you can produce incredibly fast transition times. (I know you can - just a warning for others)

[Peterae]

Sorry Wave
Not got round to doing it yet.

What i will say in response to your 3 coil system, a long time ago i did use 3 coils driven by 3 fet stages on a ferrite torroid, and using Fundamental on one fet, 2nd harmonic on 2nd fet and 3rd harmonic on third fet i was also getting the explosions in the ferrite but much quieter than using the wooden former and phased 2 stage fet system, the fundamental frequency used was 35khz.

Shame i didnt record any of my earlier stuff as i have seen a few strange things happen.

My objective now is to study this Explosion effect and unfortunatley no longer have a 2 stage system built for me to be able to reproduce the explosion effect, but today i cadded up a new board to start some tests again and ordered some bits.


Peter

[darkspeed]

Peterae - my current thoughts are - and this is just a best guess - 35khz is the prime frequency to produce an inter-winding static charge  - I tried to build a bifilar magnet coil and run it on 35khz and it did nothing but glow internally and dump huge amounts of ozone ( http://www.overunityresearch.com/index.php?topic=169.msg1433#msg1433 ). When I measured the charge on the outside of c-200 magnet wire it was way beyond the range of my 40kv probe - this may be the cause of your cracking / popping noise, your windings may be working like a capacitor and producing a static charge on the insulator - this would also account for the difference in the sound with different form material. some form materials dissipate static better..

DS

[darkspeed]

As to why it works that way - I think you are getting your delay correct to generate the needed harmonics to create a mode sum. The mode sum is the pulse and it is really high voltage. And yes it reeks of TPU  

[Peterae]

This is very interesting Ds

When i scan the delay in nS first off before i reach a delay that send all my digital equipment mad, i get the pulse that i also found this always occurs first on a very low phase delay between the pulses, i suspect this pulse is very sharp and goes way beyound even my 250mhz scope can manage, the reason i say this, with my sontroller 3 build i use a minimun etch style, and when i first ran it up i scanned and got my pulse on the scope but also got machine gun clicking from the arc over of the fet to the pcb ground, i was only driving with low Volts 30 i think it was, so the pulse was jumping at least a 1mm gap around the trace, i cut extra space around the fet and it stopped arcing.

When i had the loud explosions, i could not smell Ozone or if i put my finger on the coil could not feel discharges, being an old TV engineer i have a nose for electrical discharges, and tv repairs requires all senses, smell, hearing and good eyesight to diagnose a problem.
Ones ear gets trained to the type of discharge, wether DC AC ect, they all have their own characteristic envelope of sound and the loud explosion sound is best describded by me as an explosion, when i used the 3 coils around the ferrite i would call that a crackle inside the ferrite a different sound slightly.
The question i want to answer is for an explosion to occur, i think it must have been mechanical in nature, but how could this be, something happened faster than the speed of sound and was quiet violent, considering i am also getting laptops and digital chips behaving strange around this timing area i am edging towards a very large very fast EM burst, a large EM burst like this maybe enough to tug at the earths magnetic field and be enough if produced constantly to cause a wash board effect , you know where i am going with this  

Once i get my new controller going tests will start, i have the pcb etched, just need to wait for the parts.
I will need to first track why my fets retrigger, crazy really but i have not checked previously, i think it's noise getting to the chip rails despite all the coupling i have, i have not been worried before as it was causing the effect i wanted to study, but if i can stop it then i know the nature of the retrigger, next i need to find a way of triggering my scope by the explosion so i can grab the scope data just before the event occurs.

Remember the explosion requires 2 fet stages, but all each fet does is pull one side of the coil to ground so why 2 stages?, if 1 fet if on then the coil is grounded, and the second fet wouldnt do a thing if it came on, so the only thing i can think of is that my fet takes about 16-25nS to turn and off, this is too long so using 2 stages allows for instance 1 fet to turn off and then allows the other fet to turn on within at least 1nS, maybe even faster if it's the retriggering thats driving it to turn on may even be 10 pS that it needs for the explosion to happen.

This is of course all guess work right now.

Peter

[darkspeed]

Hmm.. Pulse like this could also cause inter-winding attraction / repulsion > 340.29 m / s ?


Second fet changes the resistance to ground?? changes the capacitance of the wire??



Have you ever crushed a can or shrunk a coin with a coil and capacitor ? does it sound like that ?

[Grumpy]

my explosions were at the transformer when using two spark gaps in series

hmmm