I am currently working on a sensor that visualizes an ECG signal and visualizes its data. Its principle is that it has 3 electrodes that must be placed in specific parts of the body .... I would like to know, please, is a sensor can work on some people and not work on others (because I tested it on a lot of people and it never returns the right signal except in one and only one person, I find it very bizzare)

  • $\begingroup$ Either you are doing something wrong or you ECG equipment is broken. $\endgroup$ – JRE Apr 8 '19 at 8:15
  • $\begingroup$ Not knowing anything about your setup it is impossible to help you / or answer your question. $\endgroup$ – Irreducible Apr 8 '19 at 8:41
  • $\begingroup$ Yes I understand. What can you tell me please about the fast Fourier transform method because in using it it sends me complex numbers and I do not know exactly what they are referring to and how they are interested. $\endgroup$ – DamiaMHD Apr 10 '19 at 9:28

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