[LAU] A crazy idea

[tdrecordable]

Might be handy somehow.

http://www.larsby.com/johan/e-bike/

On Sat, Mar 6, 2010 at 10:10 AM, Karl Hammar <karl at aspodata.se> wrote:

> Giso:
> > Karl Hammar wrote:
> ... [pedalling up/downhill] ...
> > > Well, then you need an accelerometer [1]. [2] is said to be in the
> > > iPhone, but you probably want something easier to solder.
> > >
> > > With it you could get the inclination angle and then get the applied
> > > force. If you do it right you could even get a crashing sound when
> > > falling...
> >
> > I would recommend the 'bowsense' from Notam/Hans Wilmers:
> >
> > http://lad.linuxaudio.org/events/2009_cdm/Friday/12_Wilmers/index.html
>
> Fun project that also, but note, with Bluetoth they need long time to start
> the connection. And they don't explain in [3], page 18, why they add
> epsilon * a to the gravity estimater.
>
> > It can measure the acceleration (including gravitation) vector in 3D,
> > and can transmit it at a rate of 100 or 200 Hz via bluetooth to your PC.
> > There you can transform it into OSC messages to control your synth
> > (together with the pedal rate). And the included gyrometer might improve
> > the the falling detection...
>
> Isn't gyrometers a little expensive?
>
> > > [1] http://en.wikipedia.org/wiki/Accelerometer
> > > [2]
> http://www.st.com/stonline/products/literature/ds/12726/lis302dl.htm
>
> [3]
> http://lad.linuxaudio.org/events/2009_cdm/Friday/12_Wilmers/bowsense-lac2009-slides.pdf
>
> Regards,
> /Karl
>
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