Re: [LAU] A crazy idea

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To: Karl Hammar <karl@...>
Cc: <Linux-audio-user@...>
Date: Thursday, March 4, 2010 - 2:09 pm

On Thu, 4 Mar 2010, Karl Hammar wrote:

> Why don't you put an inductive sensor [1] at the pedal gear teeth?

This is a good idea... as long as your sensor and your uC
can keep up with the pulses. I didn't look into the sensors
that you picked, but they usually publish their response
times... so you need to check that out.

How many teeth does a typ. sprocket have? Say about 40T.
Lance Armstrong spins his cranks at 80RPM. That would be
53.3 pulses/sec (or 1 pulse every 18.75 ms).

Sometimes the sprockets have spokes or holes in them to make
them lighter. Like 6 or 8. Perhaps sensing those would
provide a more sensible signal if 18ms is too fast for your
sensor/uC.

-gabriel

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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)