17 Mar
2010
17 Mar
'10
10:31 p.m.
Might be handy somehow.
http://www.larsby.com/johan/e-bike/
On Sat, Mar 6, 2010 at 10:10 AM, Karl Hammar <karl(a)aspodata.se> wrote:
Giso:
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.
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 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-lac200…
Regards,
/Karl
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