Rosemary Ainslie circuit demonstration on Saturday March 12th 2011

[neptune]

Hi Rosemary , I did not realise there was a report on your Blog . I will take a look . Thanks .

[powercat]

Here is a list of circuit test videos on YouTube, some are from members on this forum
http://www.youtube.com/results?search_type=videos&search_query=Rosemary+Ainslie+circuit&search_sort=video_date_uploaded&suggested_categories=28&uni=3

[neptune]

Dear Rosemary [ I know you don't like @Rosemary] I have read the report on your blog .I have to say that I found it very informative .I was amazed the you could make the magic oscillation last for 2.7 MINUTES and not 2.7 seconds as I previously misread . One other thing .For that to happen , your function generator was running at6.172 millihertz .Hell . I could imitate that with 2 torch batteries and some jump leads and a stopwatch! Seriously , what I am saying is that even with my poor eyesight , I could build a mechanical pulse generator using a motor driven cam and some torch batteries And incorporate variable voltage offset.That way, it eliminates all the uncertainties of 555 timers . I also think , that almost any oscilloscope would do if its sole purpose is to look for the magic oscillation .I might well give it a go yet .

[WilbyInebriated]

@evolvingape

Hi,

I was not being facetious and suggesting that load testing was exact. What I was trying to do was formulate an approach that would indicate whether or not there was net drawdown on the battery bank as Mark so rightly pointed out. No assumptions or claims can be made at all until this issue is resolved!

i wasn't suggesting you were being facetious. i was attempting to nip in the bud a foreseen point of contention. thanks for the reply but you didn't answer my question.




@ poynt

Method to determine if the proposed alternative to measuring current has any significant effect on the wave forms and values:

Select a MEAN measurement in the scope for the CSR channel. This is equivalent to determining the average value using the RC/DVM method. Note the measurement in the scope.

Keep the scope probe attached to the CSR, and attach the RC filter and DVM as I outlined. Note the MEAN value the scope is measuring to see if it has changed. Note the CSR wave form to see if it has changed. Note the voltage reading on the DVM and compare with the scope measurement.

.99

PS. If you can find a 24-bit scope, I'd be quite happy to discuss it. 

thanks poynt! and how can you be certain your scope has enough resolution to see a difference? an 8bit oscope has a crap ADC (only 256 'steps') and i've haven't even touched on the noise (from the 'front end' of the DSO) nor the fact that accuracy (most DSOs quote 3% to 5% DC accuracy) isn't even usually regarded as important for most oscilloscopes.

p.s.  it was a jest poynt... that's why i winked at you. a poynted one raising the issue of exactly how scopes "scope", their inherent inadequacies (ADC converter) and how nice it would be to have something with a bit more resolution than 8, 12 or 16bit...   and please ask humbooger to 'buck up' a little bit and quit being so emotional. it was a simple question i asked of him, he didn't have go all sophomoric...

[poynt99]

https://www.techni-tool.com/content/resources/articles/Agilent-Tips-LowCurrentMeasurements.pdf