Claimed OU circuit of Rosemary Ainslie

[fuzzytomcat]

Fuzzy:

It is just applied knowledge, simple as that.  There is nothing to reference.  I wouldn't be supprised if Poynt would graciously "open source" the setup - Gotoluc has one of his own already.

MileHigh

Your telling me the applied knowledge your refering to .... no one ever in history has documented this measurement process ??

Fuzzy 

[Rosemary Ainslie]

Ok I will reply here to conserve the "Internet trees."  (lousy joke but at least no singing)  Yes I am happy that Glen did a straight replication, absolutely.  More interesting buzz has been generated in the past week than the previous six weeks.

So nice MH.     But I really do need you to explain this - if possible.  Just concentrate on that ridiculously long spike that Fuzzy gets on the drain.  And then - why does the switch lose it's duty cycle setting?  This latter seems to be a critical condition to getting this effect.  Come on MH.  This is where you're really good.  And I really need to know before I can possibly work out a counter argument.  Truth is that I'm still getting my mind around conventional analysis - and your summations here are my text books.

And I'm so sorry you don't play bridge.  You use the contract terms so freely.  It's probably in everyday parlance.  I didn't realise.

BTW - I added you to my tribute list.  It's posted over in 'furry land' - where all the best people live.

[poynt99]

I'm sure I already posted this at OU some time ago. It is posted at EF here:
http://www.energeticforum.com/61265-post140.html

So it has been "open-source" for a while.

In the one I just built, the input and output caps are 10,000uF, 63V, and the current sense resistor is a non-inductive ceramic 1 Ohm, 1%, 12W resistor, P/N: MRA12-1.0-1%. Digikey P/N: MRA12-1.0.

MH,

I've already used this yesterday when I posted a quick measurement of 8.4W power output from my supply. The measurement technique works extremely well, and should work equally well with both battery and lab supply sources. Again I give aethertech credit for suggesting this to me. As a side note, the current measured with the current sense resistor in this little power supply add-on, correlates very well with the supply's own built-in current meter. The outboard filtering provided by this add-on helps the supply's own internal regulating circuit perform better and read more accurately on it's meters with transient-type loads such as this is.

.99

[MileHigh]

Fuzzy Glen:

V = Q/C - the voltage across a capacitor is directly proportional to the charge and inversely proportional to the capacitance.  Charge is current times time.  So when current is going out of and into the capacitor, the voltage will go up and down.  However, if you make the capacitance very large, the voltage will only have a barely perceptible ripple.  So the current flowing between the first capacitor, across the resistor into the second capacitor will have a barely perceptible ripple, it will be almost pure DC.  If Poynt measures a DC voltage, that is telling you that current at 12 (or 24?) volt potential will be flowing into the second capacitor to compensate for the net current that is flowing into the circuit at the same potential.  You know the voltage and you know the current, therefore you know the power that is being consumed by the circuit.  The second cap powering the circuit will look for all practical intents and purposes like the battery powering the circuit, with the added bonus that you know the current.  It will not be identical - the output impedance of the cap will be much lower than the already low output impedance of the battery.  The low output impedance of the cap simulating the battery is what makes the spikes disappear and just become the barely perceptible ripples that I already referred to.

Rosemary:

I think your question was answered by Hoppy (I think).  I think he said the high drain spike gets coupled into the 555 output through the MOSFET.  So that disturbs the pretty robust 555 and causes false triggering of the 555's voltage comparators, or something to that effect.  The voltage comparators then freak out the output flip-flop.  It sounds perfectly reasonable to me.  Sorry, I know that might be too techie but I am out of steam.

Also thank you for putting me on your tribute list.  If there is ever a gathering I will wear my Groucho Marx glasses.  lol

By the way, there is going to be a big mechanical capacitor discharge in a few hours when that probe smashes into the moon at high velocity.  E = 1/2 M v-squared.  Woo hoo!  lol  Let's hope they find water in mass quantities.  If they do then in 30 years they might have a moon colony.   (Jeeze a PC bot - I'll try Spanish "sexo") in one-sixth 'g' would be amazing!  lol

Poynt:  Blast that baby into action!

MileHigh

[poynt99]

Here is Glen's setup with the "Quantum" resistor he made.

His temperature measurements were taken of highest reading on the components. Both resistor ends are partially blocked, the upper one by a stopper, and the lower by having it nearly sitting on the bench surface.

My resistor is suspended about 8" above the bench surface, and both ends are completely open, as shown in a previous post.

.99