We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has two integrated circuits, one of which is a preamplifier stage. The power supply must be dual.
This simple timer can be used in many applications such as egg timer. The LED glows up when S1 is...
We find this circuit in a 1980s documentation. The circuit is for SSB modulation and the...
This circuit was found in an old American documentation aimed at amateurs. The circuit generates...