This work origins from a bachelor thesis in physics and teaching at the University Salzburg, Austria. The repository provides the necessary information to set up an ecg measurement with a raspberry pi. Additionally, the full thesis with detailed instructions as well as educational resources (only in german) is available on Research Gate
Ecg measurement and characteristics of the Author: Christoph Schranz, September 2017. Please respond in case of suspicious patterns! ;)
On the right side there is the FFT (Fast Fourier Transformation/fequency spectrum) of the measurement. See the maximum amplitude at a frequencey of around 80 beats per minute.
Note: This self-made ecg is intended for educational purpose and is therefore not suited for medical treatment.