Video demonstrating how and why those red and green LEDs measure heart rate and SpO2, and why they need to flash

https://bit.ly/3iocUdp

Smartwatches use a flashing green light to measure your heart rate and a red and infra-red light to measure your oxygen saturation. The way it works is really clever, and this video demonstrates that.

See https://youtu.be/BFZxlauizx0

#technology #health #smartwatches #heartrate #SpO2

source https://gadgeteer.co.za/video-demonstrating-how-and-why-those-red-and-green-leds-measure-heart-rate-and-spo2-and-why-they-need-to-flash/