Building a MicroPython heart rate monitor


#1

Pulse sensors have become popular due to their use in health-monitors like the Fitbit. The sensors used are cheap, simple and pretty reliable at getting a reasonable indication of heart rate in daily use. They work by sensing the change in light absorption or reflection by blood as it pulses through your arteries — a technique jauntily named photoplethysmography (PPG). The rising and falling light signal can be used to identify the pulse, and subsequently calculate heart rate.


This is a companion discussion topic for the original entry at https://www.pymadethis.com/article/wemos-heart-rate-sensor-display-micropython/

#2

Thanks for this awesome post. Just ordered all the materials. Can't wait to try this out with my son.


#3

That's great, let me know you get on!


#4

Thank you for the great post! Do you have experience in doing a 3 or 12-lead ecg? Is there a way to create such a thing with simple components like this? Again, amazing work, thank you!


#6

Hey Noel glad you enjoyed it! I’m familiar with 12-lead ECG but I’ve not tried to implement a system to do it myself — but it’s a good idea, will look into it :slight_smile: If you get anywhere yourself let me know


#7

For 12-lead you’d probably need to an filter/amplifier for the signal (sort of what’s built into the sensor here) one for each lead… definitely doable though.