Application idea: Bicycle computer
openmoko at mazikeen.demon.co.uk
Tue Dec 4 17:32:11 CET 2007
On Tuesday 04 December 2007, hank williams wrote:
> On Dec 4, 2007 7:39 AM, Neil Davey <neil at daveytronics.com> wrote:
> > If you are referring to the signal from the Polar straps, it is not
> > really a protocol...
> > It is just a magnetic pules transmitted when the heart beat occurs..
> so is there a receiver chip one could buy to detect these magnetic
> pulses? I'm not quite sure how one goes about capturing that.
Not sure about the Polar units, but for things using ANT like the suunto
cheststraps there are these:
Everything from chips to complete USB sticks. No linux driver for the USB
stick yet, but they may be willing to release enough info for one to be
developed. USB is probably easiest for connection to the Neo, while the
modules should be fine for a wireless cadence sensor. Adding a wheel pulse
should be fairly easy if you aren't happy with GPS speed. If you're feeling
really adventurous you could strain gauge the crank to give you torque
measurement, but that might eat your batteries.
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