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.
This circuit that uses only transistors indicates when the voltage in the circuit has the voltage...
This is the circuit of a robot published in the June 1992 issue of Radio Electronics magazine. The sensors...
This circuit was found in a 1980s documentation. It decodes by identifying a certain frequency tone...