STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[wings]

How useful will a PC based Oscilloscope using a  be for the task at hand, http://www.micahcarrick.com/06-06-2006/pc-sound-card-oscilloscope-linux.html

A buffer hardware circuit could be used to buffer the probe similar to a true oscilloscope and protect the PC's Line In from excessive voltages.  Would I need the buffer hardware circuit, or could I get by with just protecting the PC Line In with a Voltage Divider.

I don't have the money to buy the real thing.  I know being cheap isn't the best thing, but it has to be better than nothing and doing it totally blind.  Any thoughts?

Thanks,

GB

@gb
VA is FREE real time program which simulates a set of electronic instruments, Such as:

   Detailed Features about:

   1.      Oscilloscope (dual channel, xy, time division, trigger);
   2.      Spectrum Analyzer with amplitude and phase display (linear, log, lines, bar, octaves band analysis 1/3, 1/6, 1/9, 1/12, 1/24);
   3.      Wave-form generator with "custom functions", triangular, square, sinus, white noise and pulse generation (NO ALIASING);
   4.      Frequency meter (in time and frequency domain) and counter; in time domain by means of a real time zero crossing algorithm;
   5.      Volt meter with DC, true RMS, peak to peak and mean display;
   6.      Filtering (low pass, hi pass, band pass, band reject, notch, "diode", DC removal);
   7.      Memo windows (data log) for analysis and storage of time series, spectrum and phase  with "triggering" events; possibility to save in various formats and display them with a viewer;
   8.      A TRUE software digital analog conversion (for complete signal reconstruction using Nyquist theorem) ;
   9.      Frequency compensation: one can create/edit a custom frequency response and  add it to the spectrum analyzer spectrum ; added standard weighting curves A,B,C in parallel with custom frequency response;
  10.      Support for 8/16/24 bit soundcard by means of API calls;
  11.      Unlimited frequency sampling (depend from the capabilities of your soundcard);
  12.      Cepstrum analysis;
  13.      Cross Correlation;
  14.      Extended THD measurements, with automatic sweep and compensation.
  15.      ZRLC-meter with Vector scope, automatic sweep in time and frequency for automatic measurement.

http://hacca.altervista.org/

original site:

http://www.sillanumsoft.org/prod01.htm

[Jimboot]

Holly Smokes!!! I just did some quick COP measurements, and when subtracting electrical resistance losses, it is showing my tiny "orbo replication" is way over COP 1.

Some real quick numbers just to get this post out:


Power input from inductance input: 12.9 mW

Power output in joule heating from rotating device: 32 mW

COP: 2.5


If that's not enough, I am not even considering that nearly all of the energy that goes into inductance can be captured back, at least according to Steorns recent inductance measurements on their Orbo. So lets take that into consideration -->


Power input from inductance input: 0.258 mW (258 uW)

Power output in joule heating from rotating device: 32 mW

COP: 124


If that is not enough, I did not even take into consideration all of the joule heating.


It's possible I could have made a calculator error. We'll have to see, but so far so good. Also, remember these are quick measurements, so it could be off a bit. IMO the COP is higher than 2.5. What's interesting is that this is very close to Steorn's COP claims. Note that Steorn also does not capture the toroid losses.


I hate to get everyone's hopes up, but this is a very sincere post. IMO this tiny orbo is over COP 1 when not considering electrical resistance from the wires and mosfet.

Holy crap Batman. Waiting for my Metglas! Well done.

[gauschor]

Indeed most interesting! That would be really awesome if it turns out to be working and be replicateable. Since Steorn business won't go public, the community is all on what we can hope Please keep up the good work!

[teslaalset]

@PaulLawrence:

Impressive analysis Paul. Thanks for sharing.

In your enthusiasm you might have overlooked the option I proposed earlier to recycle the current that is stored in the coil.
If you mount a (fast) diode in parallel to the coil you re-use another wasted energy source.
The coil holds P=0.5*L*I^2 W. The diode will push that energy to the coil after switching off.
In this way you can switch off earlier in time and thus use less power resulting in same mechanical output.

What your view on this?

[PaulLowrance]

Well Sean & Steorn shot down TK's & everyone elses voltage & current scope photos, except mine so far. TK's scope photos are nothing like Steorns in terms of the RL rise times, as Steorn's is a square wave. So it looks like the metglas cores are the hot ticket.

Good luck on your replications boys & girls.