This circuit was found in the August 1994 issue of Electronics Now magazine. The 4046 is uncommon these days and the frequency range is given by C1.
This is a typical symmetrical power supply configuration. The transformer voltage determines the...
This stereo meter-indicator was found in the August 1971 issue of Radio Electronics magazine. The...
This circuit was found in an American documentation from 1970. We can increase the number of...