Found in a 90s Electronic Design, this circuit can be used as a shield in current projects. The circuit provides three levels of signals for triggering loads.
This circuit was obtained from the September 1971 issue of Radio Electronics magazine. The power...
This filter for interference generated by motors via the power grid was found in the June 1972...
This simple photometer uses a 0-200 µA galvanometer as indicator. The sensor is a common LDR and...