BandPassFilters
Design by: 9877
Two Negative-feedback second-order multi-active band pass filters based on Sallen Key filters.
Multiple boards can be linked together for many different frequency filters. I created this board for my analogue audio spectrum analyser project.
In 1 is audio signal in.
In 2 is reference voltage 6.2V
Calculate capacitor values for different frequencies using calculator at;
http://www.ekswai.com/en_nbpf.htm
