Written by knopsl

Resonant 12db LPF

I’ve been searching for filter designs I can put in a box and take with me and found this one some time ago. It is a resonant 12db LPF that works with 9-12V.

It says 5V but I didn’t test that one out because I want it to be modular compatible – and it is when run with 9-12V.

The schematic is pretty straight forward. You need a 100K dual pot tho
The build before I snipped some parts off and fit it in the box
The final box that is compact and sturdy.