Hi, I am currently building a DIY EEG circuit using the guide above. This guide is for when there are two inputs. However, how can I modify this so that I can also input two EMG signals too.
It is common knowledge that EEG's carry weak EMG signals with it. My idea is to obtain a clean EMG signal from the source, and also obtain a EEG signal (with the EMG noise) I would use the differential amplifier with both the EEG and clean EMG signal to effectively cancel out the EMG signal and get a more pure EEG signal.