photoplethysmogram circuit
does an ECG can detect heart rate using finger? im abit confuse there, because from what i see , the ecg using electrodes that connected to a certain point on the body something like Lead I , Lead II etc. , is it possible to get from the finger ? is there any circuit design schematics you could show me or recommend me ? for the PPG i could understand a bit because it is used on the index finger using infra red and photo transistor. thanks again