This 1/2 hertz high selectivity filter was found in the December 1990 issue of Radio Electronics magazine. The source must be symmetrical. The capacitors can be changed for other frequencies.
Found in an English Maplin documentation from 1983, this circuit generates separate frequency...
This powerful inverter provides a high-quality sine wave signal. I found it in a Radio Electronics issue...
Circuits and devices can be tested using the tester. The visual indication of the state of the...