ericmulk wrote:
ffmedic84 wrote:
You’re right they should stop rolling out new features. Better GPS, mapping and connectivity are all wins. This isn’t a watch marketed directly at triathletes. A built in pulse ox is awesome for high alpine climbing and mountaineering.Anyone have any ideas on how they measure the O2 in your blood from the skin level, i.e. w/o actually sticking a probe into a blood vessel???
Light source , light detector. And some signal processing. Same as optical HR. Edit: that's how clothespin on your finger O2 sat detectors work in hospitals.
They could have saved themselves a lot of R&D and simply added this to their code:
int random = rand();
If (random) printf ('99%') else printf ('100%');
And have the O2 sat bounce around between 99% and 100%. That's all it will ever do on a sportswatch….