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Pulse Necklace 08July2009
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==Pulse Choker Hack Notes, July 8th, 2009== * we found 4 different LED/phototransistor parts which would make suitable sensors * we found axial LEDs * ordered both of above from digikey * tested epoxy job on sm led from last time - still quite weak (but much stronger than crimp bead effort) * new epoxy job on radial LED legs, with more surface area we're hoping for a much stronger bond. If this works, axial LEDs will be perfect. * also trying sm epoxy again Found a series of useful webpages on sensing heart beat: [http://www.emant.com/694006.page Optical Heart Rate Monitor] [http://electronicdesign.com/Articles/ArticleID/6343/6343.html Build Your Own Optical Heart Rate Sensor] [http://members.shaw.ca/novotill/IrPulseMonitor/index.htm Earlobe Heart Rate Sensor]
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