Thread: N900 as bike computer?
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dormant is offline dormant
2009-10-21 , 20:08
Posts: 332 | Thanked: 76 times | Joined on Oct 2007 @ St. Augustine, Trinidad and Tobago
#3
Originally Posted by kotzkind View Post
As the n900 has a infrared sensor, i'm asking myself, how hard it is to build a small device that has a magnet sensor, for the magnet in the spokes of a bike and a infrared led to send a signal per turn of the wheel.
Probably quite easy. But why not go for a retro solution?
  1. Clip playing card to forks so that it makes a nice noise when a spoke hits it.
  2. Use microphone on N900 to pick up noise and software to count hits
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