Breadboard Day: 400 Hz Audio Bandpass Filter

[@KA9DSL]

A biquad filter is very sharp. The ringing can sometimes be irritating.

[@t1d100]

👍👍👍

[@jeffreyfrancis42]

What web site did you use to calculate the component values?

[@garyramsey4275]

I shouldn’t promote someone else’s website, but a quick search reveals that there are many similar resources out there. I simply chose one at random.