Olimex Support Forum

DUINO => SHIELDS => Topic started by: danvol23 on May 14, 2019, 11:28:38 am

Title: Single lead ECG measurement with Olimex EKG Shield
Post by: danvol23 on May 14, 2019, 11:28:38 am
Hello,

I would like to ask you about single lead ECG acquisition from Olimex EKG Shield. I would like to acquire data just between RA and LA without the reference. Instead of the reference electrode, I would like to connect it to the virtual ground made of a voltage divider between supplying voltage and ground. Is it the correct procedure? I just want to make me sure. If there is any other way to do it, please do not hesitate to tell me.

Thank you very much,
Daniel
Title: Re: Single lead ECG measurement with Olimex EKG Shield
Post by: LubOlimex on May 14, 2019, 12:55:39 pm
You always measure the potential difference between the right electrode and the left electrode - this is the essence of the design. The voltage reference is used to lower the noise, it is not a data signal, just a noise compensation.