I had a project kit for the above project and it used a pulse rate sensor that was clipped to the ear lobe for sensing. I think the sensor had some IR reflection type sensor, its damaged now. I want to try making a sensor myself, but dont have much idea about this, can anyone help me with some start off information.
https://www.sparkfun.com/products/11574
Look at the schematic and comments.
http://dlnmh9ip6v2uc.cloudfront.net/dat … ematic.pdf
Also read the design blogs …