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Overunity Machines Forum



DDS based function generators

Started by MeggerMan, September 08, 2007, 03:11:24 PM

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MeggerMan

#20
November 12, 2007, 05:47:32 PM
Photo showing DC socket in place.
Also have the LED on/off rocker switch in now, just the BNC sockets to go.


Bruce_TPU

#21
November 12, 2007, 06:53:26 PM
Hi Rob,

I could not help but to comment on the expert craftsmanship of your controller and case!  ;D

I am eager to see it hooked to a coil soon.  I know that you will contribute greatly in our quest to see this device work in overunity mode.  Great progress and thank you for sharing! 


Warm regards,
Bruce



1.  Lindsay's Stack TPU Posted Picture.  All Wound CCW  Collectors three turns and HORIZONTAL, not vertical.

2.  3 Tube amps, sending three frequency's, each having two signals, one in-phase & one inverted 180 deg, opposing signals in each collector (via control wires). 

3.  Collector is Magnetic Loop Antenna, made of lamp chord wire, wound flat.  Inside loop is antenna, outside loop is for output.  First collector is tuned via tuned tank, to the fundamental.  Second collector is tuned tank to the second harmonic (component).  Third collector is tuned tank to the third harmonic (component)  Frequency is determined by taking the circumference frequency, reducing the size by .88 inches.  Divide this frequency by 1000, and you have your second harmonic.  Divide this by 2 and you have your fundamental.  Multiply that by 3 and you have your third harmonic component.  Tune the collectors to each of these.  Input the fundamental and two modulation frequencies, made to create replicas of the fundamental, second harmonic and the third.

4.  The three frequency's circulating in the collectors, both in phase and inverted, begin to create hundreds of thousands of created frequency's, via intermodulation, that subtract to the fundamental and its harmonics.  This is called "Catalyst".

5.  The three AC PURE sine signals, travel through the amplification stage, Nonlinear, producing the second harmonic and third.  (distortion)

6.  These signals then travel the control coils, are rectified by a full wave bridge, and then sent into the output outer loop as all positive pulsed DC.  This then becomes the output and "collects" the current.

P.S.  The Kicks are harmonic distortion with passive intermodulation.  Can't see it without a spectrum analyzer, normally unless trained to see it on a scope.

MeggerMan

#22
November 13, 2007, 08:16:11 AM
Hi Bruce,
It's not brilliant,some of the holes were out by about 1mm, I cut the window for the LCD larger than needed because I took a chunk out when the router was slowing down and decided to cut I nice curve into the side. Should have held it firm until the router had stopped.  (mental note: get workshop assistant).
The rocker switch is very large for the case size and I will mount the next one on the side next to the DC socket.
I scratched the anodized case a few times during drilling - swarf under the workpiece. I got around this after the event by covering it with pvc tape.
The good news is the 3mm foam stuck on the inside pushes the LCD module onto the board and clears up the missing segment problem.

@Ward,
Its taken a few hours to make this one, but it is a prototype and I am getting some special milling drills for cutting the larger holes in the case.
The routing of the LCD window took about 10 minutes, so I am pleased with that. The next one will be a bit neater.
BNC sockets;
1. Square wave
2. Sine wave
3. Programmable pulse width square wave

I have not built the circuit for the last output yet, but this will be to drive the DS1023-100 chip using a PIC to give a pulse from 3ns to about 255ns(I think) in 1ns steps.

Also I will be doing some artwork to print onto tech sheet via laser printer and glue to the case to provide legends for the controls.
I have 4 cases to drill/mill and mark up for you.
I will be leaving the black trim off because it fouls the screws, but more important it is too close the sine wave amplitude control.

Regards
Rob King
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