Claimed OU circuit of Rosemary Ainslie

[S.Roksund]

Hello all,

Again, this has nothing to do with this thread - but since Groundloop and I has left
information of my circuit here, I will comment on my promises to post the schematic
and news in Overunity.com.

I have done preliminary testing with two batteries according to Groundloop's suggestion,
and found that I have no overunity. My own measurements showing overunity was false
since I do not have suitable measurement-instruments. It was also my intention to get
other qualified opinions that made me post here initially.

However, my circuit is near 100% and will suit my own application in other ways for the
commercial product that I am working on. Also my circuit is operating in a similar way as
Gotoluc's - in the thread "Re: Effects of Recirculating BEMF to Coil".

My work is continuing, and I will have private contact with Groundloop after his vacation.
I have other ideas on how to get OU. When I am ready to reveal some news I will make
a new thread in the forum.

This is all for now.

Have a nice summer!

Best regards S.Roksund

[TinselKoala]

Thanks, S.Roksund, for your candor. I know your are disappointed but I hope you have better luck in the next project.

However, I think it would be helpful to others, if you could share with us some details of your experience. If it's not too much to ask, could you please describe (in general terms, or in detail) a few things? I think it would be good to know the general idea of the circuit;  how you were first led to believe it might be OU; the kinds of tests you did that were mistaken; and how you finally determined the actual performance.
We need more stories of this kind, so that others may learn from our mistakes.
Electrical measurements can be particularly tricky and any help would be appreciated, I'm sure.
Thanks, and keep trying!
--TK

[TinselKoala]

Well, AT LAST!

Another consummate scientist, Joit, has made and posted a video showing scope traces from an Ainslie circuit build.

No--wait--what's that huge toroidal transformer doing there? And isn't this the same Joit that actually built the 555, showed a screenshot of its trace, and _still_ got the duty cycle issue wrong...?

Something tells me he's not too sure about how to use that fancy digital oscilloscope. I sure am not able to get much information from what he's showing here. Of course, I have no idea what the message is--but Rosemary seems to like his video more than she likes any of mine.

I'm jealous...what's Joit got that I haven't?

That really should be telling you something, I think. What, I'm not sure.

http://www.energetictube.com/play/Energy__Unsorted/Torroid%20Coil%20pulsed%2012V%20DC

[jibbguy]

TK i do not understand how you can appear to agree with me about the Fluke 199's input circuit then go on about the possible "ground loop"... Because the Fluke acts as a fully Differential / Isolated device, it is then a moot point and THERE WAS NO GROUND LOOP POSSIBLE when using it (*unless the ground was coming through the signal generator instead).

Also, for the same reason, the reading directly across the resistive element would not show the 25V DC batt voltage riding on it and would only show the voltage dropped across the element.  These things you supposed in your last 2 videos can happen only when the scope has a "SINGLE ENDED TO GROUND" input circuit. The Fluke does not; because it has no resistive connection to "wall-power" AC Ground; it can be considered "Differential / Isolated"

Thanks for showing the Fluke's wall wart PS as it answers that Q, and you are correct that the missing third prong in the wall plug matters in this case. The wall wart very likely acts like a isolation transformer then, de-coupling the little PS/charger from Earth Ground even when in "charge / AC power mode" (...as it certainly is while in "battery powered mode"). 

BTW: Many peeps try to "cheat" with their "Single-Ended" scopes by cutting-off the third prong of the power plug, to "float" the chassis... This is DANGEROUS, because if your home wall power socket was wired backwards (and this happens all the time), you will get a serious shock if you touch the scope's chassis or anything metal attached to it.

Now it is also within the realm of possibility that a "ground loop" situation could occur through the Wavetek with your setup... Which also has a "Single-Ended to Ground" output. And i believe that the "Signal Low" of the SG's output could tie everything to "Earth", and there be no outward signs seen (but such a situation could also suppress transient spikes). The only way to know for sure is the measure with a DMM between the "Battery Low" and the wall-power Earth ground, with and without the wavetek or any other bench equipment at all hooked up. 

Again, for those who didn't read the other forum explanation, as this a VERY IMPORTANT POINT: The reason "Single Ended To Ground" (the input circuit most "CRT" scopes without batteries use) is serious a problem for reading off-ground circuits is this: There is only RESISTANCE between the Signal Low of the scope channel, and the power supply Ground of the scope (which is also closely tied to Chassis/ Earth Ground through the third prong of the plug)... IT IS NOT "ISOLATED". So if you try to put the ground lead of the probe on a point that is NOT at ground potential, it will try to MAKE it ground potential, lol... Sometimes with disastrous consequences. Also, a voltage will be seen across this internal resistance of the scope's input circuit, and if current flows there, you will likely smoke the instrument. If in question, use a DMM to measure between wall-power Earth ground and the point in the circuit you wish to put the Signal Low of the scope probe on FIRST. Most of the scopes i repaired over the years were damaged from making this mistake (putting the ground lead of the scope probe at a point with off-Ground voltage potential)... And most of the Data Acquisition systems i have seen that were damaged beyond repair happened the same way as well.

Waveteks (sig gen's), bench meters of all types, Calibrated DC Power Supplies, and nearly all wall-powered Data Acquisition devices and bench equipment are "Single Ended to Ground". Hand-held DMM's are not, and are truly Isolated, because they are BATTERY POWERED and have no connection with the wall power Earth ground. It is possible to buy truly Isolated bench-type scopes but they are much more expensive... That is why these batt powered scopemeters are worth the money if you want to read Differentially / Off Ground voltages (such as across coils, which are nearly always "floating").

Another alternative solution is to buy external Signal Conditioners ("amplifiers"), with Isolation, as a "front end"... And then run the output to the scope or data acquisition sys.

[xenomorphlabs]

If resolved before in this thread, apologies and disregard this post.
From TK´s videos i extracted the info that Ainslie´s 555 circuit can´t produce correct duty cycles.
The reason for that might be a little deviation from the recommendations of 555 circuit modification to achieve low duty cycles. I might be wrong though, need to simulate it in spice to be sure.
There is only  one bypass diode in there and in her diagram´s she displays 2 in opposite directions.
Low 555 duty cycles are explained here: http://www.edn.com/article/CA238425.html

Never did it before like that, but with only one diode i can go pretty low on the 555 duty cycles.