Regnum said:here you have another approach.
Always use some isolation circuitry to avoid frying your guinea pic
Charlie_Brown said:I dónt think hemon its a good ECG. I did it with a photodiode instead of the orp that appears in the circuit and it does´nt work, it have too noise and you do not detect the pulse you detect small movements of your finger. I think this one work better.
Clarification, folks. IR devices described above are called "pulse oxymetry" or "photoplethysmograph". They are no recording biopotential (electric signal), therefore they are very different from ECG in both principles of operation and clinical use.
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