spectrum analyzer

This 3 channel 15 LED spectrum analyzer is the perfect addition to any audio amp project. It produces fantastic displays on three LED bars that can be individually adjusted for any particular frequency range. The circuit will take line level output from most any audio source, and operates on 12V...

Awhile back when I was looking for simple electronics projects, I found this Easy LED Color Organ project. It was easy enough to breadboard, but the results weren't very interesting since it was just on or off for bass, treble, etc. Then I found this Audio Spectrum Analyzer project, and that...