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From: Dave Kerber <dkerber AT warrenrogersassociates DOT com>
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Date: Fri, 24 Jan 2014 09:15:54 -0500
Message-ID: <785805c7d29f9d0b6bdd902cdf3e851d@mail.gmail.com>
Subject: RE: [geda-user] Best way to measure RPMs
To: geda-user AT delorie DOT com
Content-Type: text/plain; charset=ISO-8859-1
Reply-To: geda-user AT delorie DOT com

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
>
>
>
>