We found this circuit for vocal effects in the September 1990 issue of Radio Electronics magazine. The circuit works with signals from two inputs of a stereo system.
Using an operational amplifier with FET, this circuit was found in an English documentation from...
With the first project we present, a relay is activated in the presence of light. We can use it as...
This AC amplifier has a gain of 40 dB. It was found in the May 1988 issue of Radio Electronics magazine....