> Also, does anyone know how to pick up the signals from those chest > straps that come with the Polar (or other) wristwatches that measure the > pulse? Use a moving coil microphone! The chest straps seem to use the heartbeat to modulate a 5kHz (yes, kilohertz) carrier. Rather than use a mic (susceptible to interference) an audio transformer can be used. I guess Polar manufacture/license a suitable transducer but I don't know where you can get it (anyone else know?). cheers, Cliff http://wearables.cs.bris.ac.uk/ -- Subscription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org please, Please, *PLEASE* don't subscribe through a forward/false domain
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