DIY Arduino Based Pulse Oximeter Part I (with video)
I recently completed the first half of my Pulse Oximeter. Already, one can see some wonderful information about one’s heart and blood from just your finger tip. So far, I’ve interfaced to the TSL230 light sensor, takinging readings, and displaying it in a Python based QT gui. It sounds complicated but its not. Its lots of fun. Check out the video to see the graph of my heart beating from light passing through my fingertip.
Part II is very delayed (and may never happen). I hope to have the heart beats detected so that I can calculate the heart rate. Also, I will be taking measurements from both LEDs and comparing them. By doing this, I hope I can extract the oxygen saturation (amount of oxygen in my blood).
Update: Since filming the video above, I implemented the heartbeat detection and heart rate calculation. In the image below, the heart rate is calculated and show in the upper right. Also, the heart beats are automatically detected and annotated with little hearts.
Screenshot showing automatic heartbeat detection and calculated heartrate (upper right corner)
Source Code
git clone https://code.google.com/p/avr-libarduino-pulseoximeter/
- or -
https://code.google.com/p/avr-libarduino-pulseoximeter/