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Date:	Mon, 27 Jan 2014 17:47:48 -0500
Message-ID:	<CALSZ9gqspvwPBpzrvD6hw9s6GSQdkC4+7TwfFixYVE1xV=rX8Q@mail.gmail.com>
Subject:	Re: [geda-user] Best way to measure RPMs
From:	Rob Butts <r DOT butts2 AT gmail DOT com>
To:	geda-user AT delorie DOT com
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Thanks everybody!


On Fri, Jan 24, 2014 at 9:15 AM, Dave Kerber <
dkerber AT warrenrogersassociates DOT com> wrote:

> That would make sense if the rotation rate were (relatively) constant, but
> as a cyclist, I know that my cadence can vary significantly over the
> course of just one revolution.  If you were to measure the gear tooth
> period and convert that to rpm, I could see that working.
>
>
> > -----Original Message-----
> > From: John Doty [mailto:jpd AT noqsi DOT com]
> > Sent: Thursday, January 23, 2014 8:50 PM
> > To: geda-user AT delorie DOT com
> > Subject: Re: [geda-user] Best way to measure RPMs
> >
> >
> > On Jan 23, 2014, at 6:34 PM, Nathan Stewart wrote:
> >
> >
> >       The Cherry part I listed doesn't require an inductive
> > bridge, just a pullup resistor. I think counting gear teeth
> > is a good idea regardless of the sensing mechanism as it
> > gives you free resolution.
> >
> >
> >
> > At these speeds, you get the best resolution by measuring the
> > rotation period and dividing one minute by it.
> >
> > John Doty              Noqsi Aerospace, Ltd.
> >
> > http://www.noqsi.com/
> >
> > jpd AT noqsi DOT com
> >
> >
> >
> >
>

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<div dir=3D"ltr">Thanks everybody!<br></div><div class=3D"gmail_extra"><br>=
<br><div class=3D"gmail_quote">On Fri, Jan 24, 2014 at 9:15 AM, Dave Kerber=
 <span dir=3D"ltr">&lt;<a href=3D"mailto:dkerber AT warrenrogersassociates DOT com=
" target=3D"_blank">dkerber AT warrenrogersassociates DOT com</a>&gt;</span> wrote=
:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">That would make sense if the rotation rate w=
ere (relatively) constant, but<br>
as a cyclist, I know that my cadence can vary significantly over the<br>
course of just one revolution. =A0If you were to measure the gear tooth<br>
period and convert that to rpm, I could see that working.<br>
<div class=3D"im HOEnZb"><br>
<br>
&gt; -----Original Message-----<br>
&gt; From: John Doty [mailto:<a href=3D"mailto:jpd AT noqsi DOT com">jpd AT noqsi DOT com=
</a>]<br>
&gt; Sent: Thursday, January 23, 2014 8:50 PM<br>
&gt; To: <a href=3D"mailto:geda-user AT delorie DOT com">geda-user AT delorie DOT com</a>=
<br>
&gt; Subject: Re: [geda-user] Best way to measure RPMs<br>
&gt;<br>
&gt;<br>
</div><div class=3D"HOEnZb"><div class=3D"h5">&gt; On Jan 23, 2014, at 6:34=
 PM, Nathan Stewart wrote:<br>
&gt;<br>
&gt;<br>
&gt; =A0 =A0 =A0 The Cherry part I listed doesn&#39;t require an inductive<=
br>
&gt; bridge, just a pullup resistor. I think counting gear teeth<br>
&gt; is a good idea regardless of the sensing mechanism as it<br>
&gt; gives you free resolution.<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; At these speeds, you get the best resolution by measuring the<br>
&gt; rotation period and dividing one minute by it.<br>
&gt;<br>
&gt; John Doty =A0 =A0 =A0 =A0 =A0 =A0 =A0Noqsi Aerospace, Ltd.<br>
&gt;<br>
&gt; <a href=3D"http://www.noqsi.com/" target=3D"_blank">http://www.noqsi.c=
om/</a><br>
&gt;<br>
&gt; <a href=3D"mailto:jpd AT noqsi DOT com">jpd AT noqsi DOT com</a><br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt;<br>
</div></div></blockquote></div><br></div>

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