How to troubleshoot my Band pass filter circuit. In need of suggestions

[xRimAzX]

I need help as i am doing a project based on capturing eeg signals that is between 0-30 Hz.

Some Description:
Theoretical Calculations
fixed gain second order HPF
Cut off for HPF => 0.502 Hz


fixed gain second order LPF
Cut off for LPF => 62.5 Hz

Í put a 1.5 V reference to offset the output so that it lies in the range of 0 to 3V.

 

[ericgibbs]

hi,
Download this free Filter designer from TI, recommended.
Active Filter Design Application - FILTERPRO - TI Software Folder

 

[audioguru]

Although I did not calculate to see if the frequencies are correct, you made good Butterworth second-order highpass and lowpass Sallen and Key filters.

 

[crutschow]

Is the filter not working? If so what are the symptoms.