Audio Detector with LM324N


Posted on Dec 5, 2012    9365

Here is one that uses a single IC (LM324 quad op amp) and a handful of parts. This circuit is for detecting one of those 3.6khz



1. the capacitor and resistor on the output of the peak detector are selected to give a reasonable decay time. I.e. so a single pulse doesn't stretch out and be miss-interpreted as an audio signal. I think I sample the output at 100ms intervals and s




Leave Comment

characters left:

New Circuits

.

 



Top