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.
This circuit provides a good audio power from a signal at least 1 V of amplitude. The MOSFET must...
This switched stepdown regulator was found in a 60s documentation. It makes use of unusual...
This ultra-simple circuit has the frequency determined by the LC network. Any general purpose JFET...