Electrocardiography for Cheap: DIY ECG Uses One LM741 Op-Amp, Five Resistors, and 'Penny Electrodes' « Adafruit Industries – Makers, hackers, artists, designers and engineers!
DIY Sensor as Analog Input to Arduino - Project Guidance - Arduino Forum
How to Build an Electrocardiogram Machine (EKG) | PCB | Maker Pro
card10 - ECG usage
DIY ECG with AD8232 and Sound Card - YouTube
DIY ECG using a Analog Discovery 2 and LabVIEW - Hackster.io
Build DIY ECG Monitor with Digilent Analog Discovery Studio and NI LabVIEW -
Electrocardiography for Cheap: DIY ECG Uses One LM741 Op-Amp, Five Resistors, and 'Penny Electrodes' « Adafruit Industries – Makers, hackers, artists, designers and engineers!