Complete information on working SM style device.

[duff]

@zerotensor

Spherics states:

All coils [norths] need to point to a central 3D location.

Place identical coils orientated so that the poles point to the dead center of the tetrahedral.

The top coil (coil A) will be pointing downwards and the other 3 coils (X,Y,Z) will be pointing to wards the center BUT note the three coils will not be in a horizontal plane; they will be pointing 30 degrees upwards.

-Duff

[Earl]

I do not understand why people want to make things so complicated.
In this thread at
http://www.overunity.com/index.php/topic,4297.msg83397.html#msg83397

I gave the simple way to do things.  For precise timing, one does not use counters and state decoders, nor microcontrollers, nor DSP.

One uses a shift register where all stages are clocked synchronously.  Nothing else.

Simple, cheap, fast.
A 74HC164 will clock at 50 MHz or higher.  If you build the shift register from discrete NXP 74AHC74 dual F/Fs, it will clock to 170 MHz or higher.  I have seen SMD gates oscillate up to 400 MHz.

Use the KISS principle to go farther, faster.
A HC or AHC IC can directly trigger a bipolar transistor avalanche generator giving HV pulses with sub-nanosecond rise times.  Only a handful of standard components are necessary.  Impossible to build it any simpler or faster, or less expensive.

Tesla said use the highest voltage swing you can, and most importantly the fastest transition times.  Follow him or stay behind.

Earl

Circuitry :
Make a decoded digital count to 3 and reset counter w/CMOS or equl.
Phase the circuit dimensionaly too.

Looking at the picture, the duty cycle of coil A is about 31% (8/26). That means you could for example use a 74HC4017 with Q9 connected to MR so that it divides by 9. Then Q1, Q4 and Q7 provide pulses for coils X, Y and Z, and for coil A you use an OR gate like the 74HC4075 (or 3 diodes and a resistor) connected also to Q1, Q4 and Q7 to get about a 33% duty cycle. Then you could use a programmable clock generator module based on CY27EE16 or ICS307 or similar that is connected to a PC to generate exact frequencies, or use some other higher frequency oscillator .

At room temperature the HC4017 might be fast enough for a divide by 9, but these are relatively high frequencies, and the OR gate also introduces a slight delay/phase shift. Dividing by 3 would allow to generate a higher output frequency but it would require to form short pulses from long pulses.

Most flexible would probably be to have a microcontroller or DSP that has several programmable counters that are directly connected to output pins. That would allow to change the duty cycle and also to compensate for hardware tolerances and especially if its connected to a PC all parameters could be recorded and reproduced exactly and also of course control them dynamically.

Maxim even has an IC (DS1094L) that can generate 3 phases but it might not be flexible enough.

[sparks]

  Mother nature's tetrahedral tpu.  Maybe a little ammonia little rf lots of hydrogen.   Need to fill her up.  Just pee in the tank.   All kidding aside what is the nmr of nitrogen.   Jiggle that element in the middle and break the hydrogen bonds. 

[MeggerMan]

Hi Earl,
I have looked at shift registers but thats not the end of the story.
As I understand it you can clock the input and data pins and get a series of pulses to ripple along the pins.
So the pins will look like this:11111111 after 8 pulses, when what we want is 00100000

What I think is needed is about 3 flip flops connected to some nor gates and nand gates.
So output:
001____Q1 on (!1 and !2 and 3)
010____All off
011____Q2 on (!1 and 2 and 3)
100____All off
101____Q3 on (1 and !2 and 3)
110____All off
111____Reset

3 F/F for a 50% duty cycle.

Or use 2 F/F for no duty cycle then drive the output to a delay line chip or like you say use an avalanche circuit (bit of coax and a high speed power mosfet).

Regards
Rob

[Earl]

Rob,

a suitably connected SR will give you one single bit gliding from stage to stage.
All stages are logic zero except one.

connect
Stage 1 - avalanche generator 1 / coil 1
Stage 2 -
Stage 3 - avalanche generator 2 / coil 2
Stage 4 -
Stage 5 - avalanche generator 3 / coil 3
Stage 6 -

I haven't had time to look at coil 4, but don't see any major problems.

Then you program your synthesized clock generator to start at X and end at Y with step of Z and dwelling time of Q.

Lay down horizontally with food and drink, watch the oscilloscope and with-in a day or week depending upon your luck, you will find the desired frequency.  Start with a larger step and if not found reduce step size and sweep again.  Continue until the bank of incandescent lamps shining on your eyes wakes you up, hehehehe

We have no idea yet how wide the sweet spot is.  1 Hz? 10 Hz? 100 Hz? 1kHz?

I know someone sweeping an entirely and totally different FE configuration who told me his sweet spot was only 100 Hz wide.  No gradual rise or fall, no Gaussian curve, just wham bam:  full there or not at all.  Blink your eyes and you don't see it.

Regards, Earl