[PD] [LAU] A crazy idea

[tdrecordable]

Pd and Arduino with bluetooth would be my first choice for ease. PD can
synthesize and sample and connects to arduino with few hassles.

t


On Fri, Mar 5, 2010 at 11:19 AM, Rick Green <rtg at aapsc.com> wrote:

> On Thu, 4 Mar 2010, Folderol wrote:
>
> > 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 :)
>
>   Sensing the spokes measures vehicle speed, not pedaling speed, you'd want
> your synth to drop to idle while you're coasting.  I'm for a photocell
> watching the crank sprocket teeth in the rear interval where there's no
> chain.
>   You also need to measure torque, or chain tension, to drive your synth's
> volume.  An idler with a load cell on the top of the chain between the
> crank and the wheel can be used for a single-speed or three-speed in-hub
> transmission, but if you have a rear derailleur, you'll need another fixed
> idler between the sensor and the rear wheel.  If you have a front
> derailleur as well, it just gets too complicated...
>   Maybe the accelerometer is simpler after all, even if you have to
> compensate for incline.  That's just math, not hardware.
>
> --
> Rick Green
>
> "Those who would give up essential Liberty, to purchase a little
> temporary Safety, deserve neither Liberty nor Safety."
>                                   -Benjamin Franklin
>
> "As for our common defense, we reject as false the choice between our
> safety and our ideals."
>                                -President Barack Obama 20 Jan 2009
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