FYI - I’m not suggesting you build this instead but, perhaps worth consideration…
I made several Pulse Rate monitors using variety of sensors from homemade with IR, LED’s, OPAmps…etc. All were a good bit of Fun and all required dialing-in.
When I finished, I tried out some sensors from Amazon and decided because (at the time) they were only $3, it made sense to buy a box of them and forgo making my own (for about the same cost).
The units I bought (3 yrs ago) are TooGoo brand and there are several clones available (from a few dollars to rip-off prices). Screenshot… I made a 3D-printed enclosure for the sensor. Screenshot
I designed the electronics with Fritzing (that’s why I’m posting here) using Arduino Nano’s. Also used Nokia and TFT displays but prefer the Nokia 5110 INK LCD.
I use the “Pulse Sensor Playground” library for Arduino.
Fritzing file and Screenshots below… Yes, my pulse really is low 50’s bpm.
Pulse1_wTooGoo.fzz (47.1 KB)
