This circuit was obtained from a Radio Electronics from the 90's. The circuit limits the strength of an audio signal preventing saturation. Equivalent operational amplifiers can be tried.
This small circuit for the medium or short-wave range, depending on the coil, was found in a...
Pressure switches are used in this circuit that quickly turns off the supply of a load if...
This circuit will trigger an audible warning signal after the end of the pre-programmed timing. Using...