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<div dir="ltr" data-setdir="false">Michael,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Thank you for clarifying my thinking. I have been around solid state electronics so much I forgot about rotating machines. Yes we could arrange a strobe light to flash at a particular time in a sinewave voltage and match that with the shaft and protractor.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I especially like the ganged synchronous motor example.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Sound waves, well there is no shaft with a physical angle. After having proven that the math of sine waves works for rotating machines and demonstrating sounds with same wave shape, the concept of angle can be directly applied. I could imagine a device that had a knob that controlled electrical angle. The most tricky part would be finding a control that has 360 degrees of rotation. Not that that is impossible, just that most control devices don't have that less than a full circle of rotation.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Paul<br></div><div><br></div>
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On Saturday, April 25, 2020, 10:43:23 AM PDT, Michael Paoli <michael.paoli@cal.berkeley.edu> wrote:
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<div>> From: "<a shape="rect" href="mailto:paulz@ieee.org" rel="nofollow" target="_blank">paulz@ieee.org</a>" <<a shape="rect" href="mailto:paulz@ieee.org" rel="nofollow" target="_blank">paulz@ieee.org</a>><br clear="none">> Subject: Re: [conspire] Trig. - SAS and ASA, but no ... Re: <br clear="none">> Password permutations (was: Correction)<br clear="none">> Date: Sat, 25 Apr 2020 17:16:47 +0000 (UTC)<br clear="none"><br clear="none">> problems that didn't have anything to do with triangles. I'm still <br clear="none">> trying to find anything related to electricity that can be measured <br clear="none">> with a protractor.<br clear="none"><br clear="none">Hmmm, how 'bout with synchronous motor, variable phase delay, and strobe?<br clear="none">How 'bout ye oldeish engine tuning kit, and strobe, and measuring<br clear="none">dwell angle ... now, typically would use a protractor to measure that,<br clear="none">but ... uhm could (... sort'a ... wouldn't be as accurate, though).<br clear="none">How 'bout ganged synchronous motors - translates angle from one matching<br clear="none">to the other ... could always measure that angle with a protractor.<br clear="none">I'm sure lots of phase delay + strobe with circular motions, one<br clear="none">could use protractor to measure.<br clear="none">Sound oscillations and phase delay ... suitably set up with control<br clear="none">on the phase delay on control dial, so it was degree-for-degree match,<br clear="none">could measure that with protractor.<br clear="none"><br clear="none">Okay, sure, maybe not most common that a protractor could/would be used,<br clear="none">but those examples aren't exactly horribly contrived. There are probably<br clear="none">some more practical (though maybe obscure/rare) where a protractor would<br clear="none">or might be (more) commonly used, and related to electricity.<br clear="none"><br clear="none">I'm thinking also there are probably astronomy/navigation areas involving<br clear="none">electronics where a protractor could possibly be used ... but probably<br clear="none">more commonly (much) more accurate means of measurements are are used,<br clear="none">but still, degrees and angles and such. Heck, GPS ... but way more<br clear="none">accurate than protractor. ;-) Accurate enough one ought take<br clear="none">relativistic bits into account for particularly good accuracy.<div class="ydpfb5f46f8yqt1900996274" id="ydpfb5f46f8yqtfd44668"><br clear="none"><br clear="none"><br clear="none">_______________________________________________<br clear="none">conspire mailing list<br clear="none"><a shape="rect" href="mailto:conspire@linuxmafia.com" rel="nofollow" target="_blank">conspire@linuxmafia.com</a><br clear="none"><a shape="rect" href="http://linuxmafia.com/mailman/listinfo/conspire" rel="nofollow" target="_blank">http://linuxmafia.com/mailman/listinfo/conspire</a><br clear="none"></div></div>
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