Arduino Heart Rate Monitor. 6 Comments . by: Mike Szczys. September 25, 2011. Title: ... [Wolf] had a Polar brand exercise watch that wirelessly monitored a chest strap that sends it heart rate data.

Heart rate sensors available for DIY use employ photoplethysmography which illuminates the skin and measures changes in light absorption. These sensors are cheap, however, the circuitry required ...

For more details and full instructions on how to create your very own wearable Arduino heart rate monitor jump over to the Hackster.io website via the link below. Source: Adafruit: Hackster.io.

Most heart rate sensors on wearables are photoplethysmography (PPG) sensors, which use light to detect the rate of blood flow, and it shines through skin and tissue to get that data.