Turn FR into bike meter

arne anka openmoko at ginguppin.de
Fri Jul 3 14:26:06 CEST 2009

>> Hm, i was always under the impression that most bike systems use a
>> simple magnet and a reed switch (no need for hall effect sensor) for
>> both cadence and speed measurements. So any sensor from a regular
>> "bike computer" can be directly attached to the mic line of FR.
> They do, and they eventually fail


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