[LAU] A crazy idea

[Giso Grimm]

Karl Hammar wrote:
> Fons:
>> On Thu, Mar 04, 2010 at 11:39:40AM +0000, Jonathan Gazeley wrote:
>>
>>> Nick Copeland suggested simulating the force applied to the pedals by 
>>> calculating the rate of change of the cadence. I reckon that might do 
>>> the trick.
>> It doesn't. Just consider going uphill 5% or downhill 5% at
>> the same and constant cadence. Makes some difference to your
>> legs and to a motor.
> 
> 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

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...

Best regards,

Giso

> 
> Regards,
> /Karl
> 
> [1] http://en.wikipedia.org/wiki/Accelerometer
> [2] http://www.st.com/stonline/products/literature/ds/12726/lis302dl.htm
> 
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> Karl Hammar                    Aspö Data               karl at aspodata.se
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