Look at my reply in the other forum about the common mode cancellation signal that is missing in your circuit and where the three probes should be connected on the patient.
If you want to measure heartbeats on a finger then use an IR LED and IR detector that "sees" blood flow pulses.
Hi Audioguru I really appreciate the quick reply! Yes, I am aware of having three probes to measure ECG. It will give a better reading. I came across this product called Alivecor (
https://www.alivecor.com ). I was intrigued by it and so I was interested in building a two finger ECG. This is the completed circuit the talented people from cs.washington.edu came up with. They were able to get the trace from their input. The resulting oscilloscope is reading is here too. I have attached the photos with this thread. Once I get back from work I can post my completed circuit and the oscilloscope reading.
I am not sure what mistake I am making. All the connections were fine. Maybe my body signal is too weak. Is there any way on how I can improve on this circuit to get a better ECG. Thank you!