Re: [LAU] A crazy idea

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To: <linux-audio-user@...>
Date: Thursday, March 4, 2010 - 6:14 pm

On Thu, 04 Mar 2010 10:27:43 +0000
Jonathan Gazeley wrote:

> On 04/03/10 10:20, James Morris wrote:

Instead of directly trying to measure RPM, measure milliseconds per
rev. then invert it. Once you have your first reading, then start to
average over 2/3 revs. gives you a pretty fast responding figure with a
simple setup.

Also, use a short range photocell on the spokes (say 50mm). Easy to
mount, reliable results with minimal effort. As these can usually
respond up to 10-30kHz you won't have to worry about pedalling too
fast :)

--
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
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Messages in current thread:
[LAU] A crazy idea, Jonathan Gazeley, (Thu Mar 4, 9:48 am)
Re: [LAU] A crazy idea, Joseph Sheedy, (Fri Mar 5, 7:15 am)
Re: [LAU] A crazy idea, andy baxter, (Thu Mar 4, 6:35 pm)
Re: [LAU] A crazy idea, Charles Henry, (Thu Mar 4, 3:04 pm)
Re: [LAU] A crazy idea, Charles Henry, (Thu Mar 4, 3:34 pm)
Re: [LAU] A crazy idea, Rick Green, (Thu Mar 4, 1:57 pm)
Re: [LAU] A crazy idea, Paul Davis, (Thu Mar 4, 3:00 pm)
Re: [LAU] A crazy idea, Rick Green, (Thu Mar 4, 11:13 pm)
Re: [LAU] A crazy idea, Paul Davis, (Thu Mar 4, 1:10 pm)
Re: [LAU] A crazy idea, Jonathan Gazeley, (Thu Mar 4, 1:16 pm)
Re: [LAU] A crazy idea, Karl Hammar, (Thu Mar 4, 12:37 pm)
Re: [LAU] A crazy idea, Gabriel M. Beddingfield, (Thu Mar 4, 2:09 pm)
Re: [LAU] A crazy idea, James Morris, (Thu Mar 4, 10:20 am)
Re: [LAU] A crazy idea, Jonathan Gazeley, (Thu Mar 4, 10:28 am)
Re: [LAU] A crazy idea, Folderol, (Thu Mar 4, 6:14 pm)
Re: [LAU] A crazy idea, Rick Green, (Fri Mar 5, 12:30 am)
Re: [LAU] A crazy idea, michael noble, (Fri Mar 5, 4:52 am)
Re: [LAU] A crazy idea, Jonathan Gazeley, (Fri Mar 5, 10:13 am)
Re: [LAU] A crazy idea, Gordon JC Pearce, (Fri Mar 5, 7:40 am)
Re: [LAU] A crazy idea, Rick Green, (Fri Mar 5, 6:41 am)
Re: [LAU] A crazy idea, , (Thu Mar 4, 11:32 am)
Re: [LAU] A crazy idea, Jonathan Gazeley, (Thu Mar 4, 11:39 am)
Re: [LAU] A crazy idea, , (Thu Mar 4, 11:54 am)
Re: [LAU] A crazy idea, Karl Hammar, (Thu Mar 4, 1:00 pm)
Re: [LAU] A crazy idea, Giso Grimm, (Fri Mar 5, 8:54 pm)
Re: [LAU] A crazy idea, Karl Hammar, (Fri Mar 5, 11:11 pm)
Re: [LAU] A crazy idea, tdrecordable, (Thu Mar 18, 1:31 am)
Re: [LAU] A crazy idea, Nick Copeland, (Thu Mar 4, 9:00 pm)
Re: [LAU] A crazy idea, , (Thu Mar 4, 9:30 pm)
Re: [LAU] A crazy idea, Nick Copeland, (Thu Mar 4, 10:13 pm)
Re: [LAU] A crazy idea, Jörn Nettingsmeier, (Fri Mar 5, 9:10 am)
Re: [LAU] A crazy idea, Arnold Krille, (Fri Mar 5, 8:29 am)
Re: [LAU] A crazy idea, Jörn Nettingsmeier, (Fri Mar 5, 9:12 am)
Re: [LAU] A crazy idea, Julien Claassen, (Thu Mar 4, 10:24 am)
Re: [LAU] A crazy idea, Jonathan Gazeley, (Thu Mar 4, 10:31 am)
Re: [LAU] A crazy idea, Julien Claassen, (Thu Mar 4, 10:40 am)
Re: [LAU] A crazy idea, Julien Claassen, (Thu Mar 4, 10:09 am)