Barebones heart rate monitor

1

Hi all,

I’m looking to make a super simple heart rate monitor to wear on my wrist. I’ve set my mind on making this a nice introductory project that avoids any flashy upgrades. I’ve narrowed down my requirements to the following:

  1. Monitor Heartrate
  2. Beep if heartrate exceeds a set point for set amount of time
  3. On/Off switch to help conserve battery when not being worn
  4. Programmable button to silence the beeping for a set time

That’s really it. I don’t need a display, and I can just 3D print some type of shell and tie the whole thing to my wrist with string if need be haha, I’m really just focused on those few features and keeping it all as compact as possible.

Any suggestions on what parts could be used here?

2

Here are a few designs that you can follow.

You can implement the alarm system by your code but the basic can be made by following these designs.

3

For something like this that is really ‘super simple’ project, I think following a guide that has already laid out the ideas is probably the best step.

I think for getting started, both options that love312190 has highlighted would be good, but the second one, which can more easily be reached at this Instructables Page
, is the neater project. That being said, I really do love the LEDs on that first Heart Rate monitor.