How to Construct a Low-Pass Filter Circuit on a Protoboard - YouTube
Trouble with breadboards... any advice? - Project Guidance - Arduino Forum
Low pass filter -- how hard can it be? - General Electronics - Arduino Forum
Low Pass Filter Project
URGENT!: A diode ladder filter fully assembled on a protoboard (breadboard style layout) hasn't functioned yet, and only about a day left before I need to pack to go to another country.
Experiment 01- Second order Low pass filter - YouTube