Forums Focus Products EEG Developer Kit Electrodes output reaches up to 5V when they're held in the air. Reply To: Electrodes output reaches up to 5V when they're held in the air.

#13345
insaf.bouguezine1706
Participant

I would like to further explain my question.

Is this the common mode voltage? and is it normal that it would be this high?

Note that my initial problem is that I cannot seem to detect the eeg signal.

NOTE: I’m only using the pair of electrodes that I’m driving into a differential analog input of an ADS1298 which is then connected to a raspberrypi. Note that my code includes a 8-12Hz filter which should eliminate the 50 Hz component but I’m still not getting any eeg signal.

Do I have to use the bias output to obtain a signal?

Thanks in advance.

Regards,

Insaf